Introduction to joining mechanical fastening mechanical fasteners and joining methods adhesive bo... more Introduction to joining mechanical fastening mechanical fasteners and joining methods adhesive bonding process welding as a process the metallurgy of welding brazing soldering other joining processes joining of metals alloys and intermetallics joining of ceramics and of glasses joining of polymers joining composite materials joining dissimilar material combinations.
Boletín de la Sociedad Española de Cerámica y Vidrio, 2017
Amorphous lithium phosphorous oxynitride film was coated directly on pre-treated lithium metal as... more Amorphous lithium phosphorous oxynitride film was coated directly on pre-treated lithium metal as anode of lithium air battery by radio-frequency sputtering technique from a Li 3 PO 4 target. The structure and composition of modified anode was analyzed before and after charge/discharge test in a lithium-air battery, which comprises 0.5 M LiNO 3 /TEGDME as the electrolyte and super P carbon as cathode. Batteries were galvanostatically discharged by an Arbin BT-2000 battery tester between open current voltage and 2.15 V vs. Li + /Li at various current regimes ranging from 0.1-0.4 mA/cm 2. Compared with fresh lithium, LIPON-coated anode exhibited better electrochemical performance. Good charging efficiency of 90% at a narrower voltage gap with high ionic conductivity of 9.4 × 10 −5 S/cm was achieved through optimizing lithium pre-treated conditions, sputtering N 2 flows and suitable solute for electrolyte.
Heavy-metal-oxide (HMO) glasses attract much interest in many applications such as Faraday rotato... more Heavy-metal-oxide (HMO) glasses attract much interest in many applications such as Faraday rotators, current sensors, etc., in the area of magneto-optic effects due to their unique magnetic-optical property, high refractive index and other interesting properties. However, during the melt-quenching process of these glasses, the high corrosive nature of the melt to the crucibles makes the fabrication of HMO glasses complicated and the properties of the obtained glasses show strong dependence on the crucible materials. Literatures reported that the gold and platinum crucibles are not suitable due to their contamination to the melt glasses, ceramic crucible was considered suitable for the melting of HMO glasses. In this work, magnetic-optical glasses within the system of PbO-Bi 2 O 3-B 2 O 3 have been prepared using different kinds of ceramic crucibles for the aim of finding the most suitable crucible for melting HMO glasses. The glass properties in terms of Verdet constant, thermal stability and UV-Vis-IR transmittance in function of different crucibles were studied and reported. It was found that the same batch of glasses prepared under same conditions (melting temperature, melting time and annealing process), but in different ceramic crucibles (coded as C1, C2 and C3) showed significant difference in properties such as glass forming ability, thermal stability, optical absorption in UV-Vis-IR and Verdet constant (0.0812-0.1483 min/G•cm). The ceramic crucible made of 25% Al 2 O 3 and 75% SiO 2 (C2) was found to be the most suitable for PbO-Bi 2 O 3-B 2 O 3 glass preparation, compared with platinum, gold, C1 and C3. Glasses melted with C2 exhibit good performance in magneto and optical property, as well as good thermal stability.
Diamagnetic TeO 2-PbO-B 2 O 3 glasses were meltquenching fabricated and characterized for Fe 3 O ... more Diamagnetic TeO 2-PbO-B 2 O 3 glasses were meltquenching fabricated and characterized for Fe 3 O 4 /Ag nanoparticles doping through radio-frequency sputtering and thermal treatment techniques. The surface plasmon resonance influenced structure, composition, optical, and magneto optical properties of Fe 3 O 4 /Ag doped glasses were investigated through XRD, SEM, XPS analysis, and Faraday rotation measurement. The optimized sputtering and thermal conditions Fe 3 O 4 and Ag nanoparticles were obtained. Under the optimized conditions, a great enhancement of Faraday rotation, thermal property, and big UV cutoff red-shift due to the excited surface plasma's resonance effect was achieved in diamagnetic glass.
Boletín de la Sociedad Española de Cerámica y Vidrio, 2017
High heavy metal oxides (60-100 mol.%) ternary PbO-Bi 2 O 3-B 2 O 3 (PBB) glasses were fabricated... more High heavy metal oxides (60-100 mol.%) ternary PbO-Bi 2 O 3-B 2 O 3 (PBB) glasses were fabricated and characterized. Using a homemade single lightway DC magnetic setup, Verdet constants of PBB glasses were measured to be 0.0923-0.1664 min/G cm at 633 nm wavelengths. Glasses with substitution of PbO by Bi 2 O 3 were studied in terms of their Faraday effects. PbO-Bi 2 O 3-B 2 O 3 = 50-40-10 mol.% exhibited good thermal stability, high Verdet constant (0.1503 min/G cm) and good figure of merit (0.071). Based on this glass, a magneto optical current sensor prototype was constructed and its sensitivity at different currents was evaluated to be 8.31 nW/A.
ABSTRACT A diamagnetism TeO2-PbO-B2O3–SiO2 glass system was fabricated and characterized for magn... more ABSTRACT A diamagnetism TeO2-PbO-B2O3–SiO2 glass system was fabricated and characterized for magneto optical current sensing application. Thermal and magneto optical properties were investigated using a home-made optical bench. The highest Verdet constant of the TP18 glass was measured to be 0.2 min/G · cm at 632.8 nm. Two robust magneto-optical current sensor prototypes, based on light reflection and light transition respectively, based on TP18 glass as sensing head, were constructed and evaluated in terms of sensitivity to different currents and stability to different temperatures. A silver layer was deposited on fabricated glass acting as a mirror to reflect the light by Radio Frequency sputtering for light reflection prototype. Obtained result indicated that the light reflection prototype exhibited better performance than that of light transition, showing high sensitivity and good stability for current sensing applications.
A rare earth doped heavy metal PbO–Bi2O3–B2O3–CeO2–TbO2 system was fabricated and characterized f... more A rare earth doped heavy metal PbO–Bi2O3–B2O3–CeO2–TbO2 system was fabricated and characterized for waveguide fabrication. A glass host was selected among 11 heavy metal oxides candidates for rare earth doping and photosensitive study in visible range. The influences of rare earth contents on spectral and properties of glasses were investigated. Glass Pb50Bi20B30 + 1 % Tb + 1 % Ce was found to be ideal for laser irradiation multifunctional waveguides material which exhibited good thermal stability, high absorption and big refractive index change (7.9 × 10−3) at 1553 nm after visible laser exposure at 10,000 pulses for 60 s.
ABSTRACT We report the 1.5 μm emission band broadening of Er3 + observed in multicomponent SiO2–G... more ABSTRACT We report the 1.5 μm emission band broadening of Er3 + observed in multicomponent SiO2–GeO2–B2O3–Na2O glasses. The largest bandwidth Δλeff = 95.6 nm was obtained in glass with a composition of 66.75% SiO2–13% GeO2–6% B2O3–4.45% Na2O in wt.%. The band broadening was found to be dealt with: 1) high Er3 + concentration broadening; 2) Yb3 + co-doped broadening; 3) B2O3 broadening; and 4) the reduction of Na2O content broadening. FT-IR spectra showed that the network structure of glasses changed with the glass compositions, which was proven by the significant change of the vibration band of Si − 1 3 +
Open Journal of Inorganic Non-metallic Materials, 2011
MAGNETO-OPTICAL current transformers (MOCT) based on the Faraday Effect provide numerous advantag... more MAGNETO-OPTICAL current transformers (MOCT) based on the Faraday Effect provide numerous advantages over the conventional transformers. However the commonly used materials in MOCT are crystals that are very expensive and temperature dependence thus will cause many problems for the output signal. Cost efficient diamagnetic PbO-Bi 2 O 3-B 2 O 3 (PBB) glass system is fabricated in this study, for the aim of obtaining a good candidate glass with high Verdet constant and good temperature resistance to replace crystals. A home-made optical bench was setup, calibrated and used for measuring the Verdet constant of the fabricated glasses. Glass with composition of 50%PbO-40%Bi 2 O 3-10%B 2 O 3 in mol showed high Verdet constant (0.1533 min•G-1 •cm-1) and good value of the figure of merit (0.02635 min•G-1), which can be considered as the ideal candidate for MOCT applications.
The fabrication and characterization of a tellurite based high numerical aperture magneto-optical... more The fabrication and characterization of a tellurite based high numerical aperture magneto-optical glass fiber are presented. Different glass groups were investigated in terms of their structural, thermal, mechanical, optical and magnetic performance as a core/cladding pair and their refractive index contributions to the numerical aperture. A well matched core/cladding pair was selected: 75%TeO 2-20%ZnO-5%Na 2 O (mol.%) for core glass, 42%TeO 2-18%ZnO-15%K 2 O-20%Ge 2 O-5SiO 2 (mol.%) for cladding glass. The fibers have a good cross section and a numerical aperture as high as 0.9. The Verdet constant of this high numerical aperture fiber was close to that of bulk glass.
The Faraday rotation influence factors in tellurite-based glass and fibers were studied by experi... more The Faraday rotation influence factors in tellurite-based glass and fibers were studied by experiments and simulations. TeO 2-ZnO-Na 2 O-BaO glass family was fabricated and characterized in terms of the thermal and magneto-optical properties. Two core-cladding pairs for two fibers were selected from fabricated glasses. The Verdet constants of the glasses and fibers were measured at different wavelengths using a homemade optical bench, and the Verdet constant of fiber was close to that of the bulk glass. The influence from external factors (wavelength, laser power and magnetic field) and internal factors (thermal expansion coefficient difference, refractive index and Verdet constant of core and cladding) on Faraday rotation in fibers was investigated and discussed, and the purpose of this study is to improve the Faraday rotation in tellurite fibers for MO device applications both from internal material property match and external parameter configuration in measurement.
Seventh International Conference on Photonics and Imaging in Biology and Medicine, 2008
Micro-channels were fabricated in sodalime glass through imprinting, and then joined to a glass s... more Micro-channels were fabricated in sodalime glass through imprinting, and then joined to a glass slab by thermal assisted direct bonding (TADB). These techniques are simple and low cost, suitable for mass production of micro-fluidic devices. The joined samples were characterized before and after TADB by optical microscopy, profilometer, SEM, shear strength test and Vickers hardness test. The integrity of channels
ABSTRACT Laser writing attached many attentions for fabrication micro-channels in microfluidics d... more ABSTRACT Laser writing attached many attentions for fabrication micro-channels in microfluidics devices and lab-on-chip devices for biomedical applications. In this study, micro-channels were fabricated on different materials as masters using nanosecond diode-pumped solid state (DPSS) laser writing for imprinting on glass and polymer microfluidics devices. Good quality microstructures were fabricated on silicon, nickel alloy, cooper/brass and alumina, respectively by laser writing which proved that the nanosecond DPSS laser is suitable for rapid prototyping and rapid manufacturing of surface microstructures on different substrates as mask-less exposure system of imprinting.
Introduction to joining mechanical fastening mechanical fasteners and joining methods adhesive bo... more Introduction to joining mechanical fastening mechanical fasteners and joining methods adhesive bonding process welding as a process the metallurgy of welding brazing soldering other joining processes joining of metals alloys and intermetallics joining of ceramics and of glasses joining of polymers joining composite materials joining dissimilar material combinations.
Boletín de la Sociedad Española de Cerámica y Vidrio, 2017
Amorphous lithium phosphorous oxynitride film was coated directly on pre-treated lithium metal as... more Amorphous lithium phosphorous oxynitride film was coated directly on pre-treated lithium metal as anode of lithium air battery by radio-frequency sputtering technique from a Li 3 PO 4 target. The structure and composition of modified anode was analyzed before and after charge/discharge test in a lithium-air battery, which comprises 0.5 M LiNO 3 /TEGDME as the electrolyte and super P carbon as cathode. Batteries were galvanostatically discharged by an Arbin BT-2000 battery tester between open current voltage and 2.15 V vs. Li + /Li at various current regimes ranging from 0.1-0.4 mA/cm 2. Compared with fresh lithium, LIPON-coated anode exhibited better electrochemical performance. Good charging efficiency of 90% at a narrower voltage gap with high ionic conductivity of 9.4 × 10 −5 S/cm was achieved through optimizing lithium pre-treated conditions, sputtering N 2 flows and suitable solute for electrolyte.
Heavy-metal-oxide (HMO) glasses attract much interest in many applications such as Faraday rotato... more Heavy-metal-oxide (HMO) glasses attract much interest in many applications such as Faraday rotators, current sensors, etc., in the area of magneto-optic effects due to their unique magnetic-optical property, high refractive index and other interesting properties. However, during the melt-quenching process of these glasses, the high corrosive nature of the melt to the crucibles makes the fabrication of HMO glasses complicated and the properties of the obtained glasses show strong dependence on the crucible materials. Literatures reported that the gold and platinum crucibles are not suitable due to their contamination to the melt glasses, ceramic crucible was considered suitable for the melting of HMO glasses. In this work, magnetic-optical glasses within the system of PbO-Bi 2 O 3-B 2 O 3 have been prepared using different kinds of ceramic crucibles for the aim of finding the most suitable crucible for melting HMO glasses. The glass properties in terms of Verdet constant, thermal stability and UV-Vis-IR transmittance in function of different crucibles were studied and reported. It was found that the same batch of glasses prepared under same conditions (melting temperature, melting time and annealing process), but in different ceramic crucibles (coded as C1, C2 and C3) showed significant difference in properties such as glass forming ability, thermal stability, optical absorption in UV-Vis-IR and Verdet constant (0.0812-0.1483 min/G•cm). The ceramic crucible made of 25% Al 2 O 3 and 75% SiO 2 (C2) was found to be the most suitable for PbO-Bi 2 O 3-B 2 O 3 glass preparation, compared with platinum, gold, C1 and C3. Glasses melted with C2 exhibit good performance in magneto and optical property, as well as good thermal stability.
Diamagnetic TeO 2-PbO-B 2 O 3 glasses were meltquenching fabricated and characterized for Fe 3 O ... more Diamagnetic TeO 2-PbO-B 2 O 3 glasses were meltquenching fabricated and characterized for Fe 3 O 4 /Ag nanoparticles doping through radio-frequency sputtering and thermal treatment techniques. The surface plasmon resonance influenced structure, composition, optical, and magneto optical properties of Fe 3 O 4 /Ag doped glasses were investigated through XRD, SEM, XPS analysis, and Faraday rotation measurement. The optimized sputtering and thermal conditions Fe 3 O 4 and Ag nanoparticles were obtained. Under the optimized conditions, a great enhancement of Faraday rotation, thermal property, and big UV cutoff red-shift due to the excited surface plasma's resonance effect was achieved in diamagnetic glass.
Boletín de la Sociedad Española de Cerámica y Vidrio, 2017
High heavy metal oxides (60-100 mol.%) ternary PbO-Bi 2 O 3-B 2 O 3 (PBB) glasses were fabricated... more High heavy metal oxides (60-100 mol.%) ternary PbO-Bi 2 O 3-B 2 O 3 (PBB) glasses were fabricated and characterized. Using a homemade single lightway DC magnetic setup, Verdet constants of PBB glasses were measured to be 0.0923-0.1664 min/G cm at 633 nm wavelengths. Glasses with substitution of PbO by Bi 2 O 3 were studied in terms of their Faraday effects. PbO-Bi 2 O 3-B 2 O 3 = 50-40-10 mol.% exhibited good thermal stability, high Verdet constant (0.1503 min/G cm) and good figure of merit (0.071). Based on this glass, a magneto optical current sensor prototype was constructed and its sensitivity at different currents was evaluated to be 8.31 nW/A.
ABSTRACT A diamagnetism TeO2-PbO-B2O3–SiO2 glass system was fabricated and characterized for magn... more ABSTRACT A diamagnetism TeO2-PbO-B2O3–SiO2 glass system was fabricated and characterized for magneto optical current sensing application. Thermal and magneto optical properties were investigated using a home-made optical bench. The highest Verdet constant of the TP18 glass was measured to be 0.2 min/G · cm at 632.8 nm. Two robust magneto-optical current sensor prototypes, based on light reflection and light transition respectively, based on TP18 glass as sensing head, were constructed and evaluated in terms of sensitivity to different currents and stability to different temperatures. A silver layer was deposited on fabricated glass acting as a mirror to reflect the light by Radio Frequency sputtering for light reflection prototype. Obtained result indicated that the light reflection prototype exhibited better performance than that of light transition, showing high sensitivity and good stability for current sensing applications.
A rare earth doped heavy metal PbO–Bi2O3–B2O3–CeO2–TbO2 system was fabricated and characterized f... more A rare earth doped heavy metal PbO–Bi2O3–B2O3–CeO2–TbO2 system was fabricated and characterized for waveguide fabrication. A glass host was selected among 11 heavy metal oxides candidates for rare earth doping and photosensitive study in visible range. The influences of rare earth contents on spectral and properties of glasses were investigated. Glass Pb50Bi20B30 + 1 % Tb + 1 % Ce was found to be ideal for laser irradiation multifunctional waveguides material which exhibited good thermal stability, high absorption and big refractive index change (7.9 × 10−3) at 1553 nm after visible laser exposure at 10,000 pulses for 60 s.
ABSTRACT We report the 1.5 μm emission band broadening of Er3 + observed in multicomponent SiO2–G... more ABSTRACT We report the 1.5 μm emission band broadening of Er3 + observed in multicomponent SiO2–GeO2–B2O3–Na2O glasses. The largest bandwidth Δλeff = 95.6 nm was obtained in glass with a composition of 66.75% SiO2–13% GeO2–6% B2O3–4.45% Na2O in wt.%. The band broadening was found to be dealt with: 1) high Er3 + concentration broadening; 2) Yb3 + co-doped broadening; 3) B2O3 broadening; and 4) the reduction of Na2O content broadening. FT-IR spectra showed that the network structure of glasses changed with the glass compositions, which was proven by the significant change of the vibration band of Si − 1 3 +
Open Journal of Inorganic Non-metallic Materials, 2011
MAGNETO-OPTICAL current transformers (MOCT) based on the Faraday Effect provide numerous advantag... more MAGNETO-OPTICAL current transformers (MOCT) based on the Faraday Effect provide numerous advantages over the conventional transformers. However the commonly used materials in MOCT are crystals that are very expensive and temperature dependence thus will cause many problems for the output signal. Cost efficient diamagnetic PbO-Bi 2 O 3-B 2 O 3 (PBB) glass system is fabricated in this study, for the aim of obtaining a good candidate glass with high Verdet constant and good temperature resistance to replace crystals. A home-made optical bench was setup, calibrated and used for measuring the Verdet constant of the fabricated glasses. Glass with composition of 50%PbO-40%Bi 2 O 3-10%B 2 O 3 in mol showed high Verdet constant (0.1533 min•G-1 •cm-1) and good value of the figure of merit (0.02635 min•G-1), which can be considered as the ideal candidate for MOCT applications.
The fabrication and characterization of a tellurite based high numerical aperture magneto-optical... more The fabrication and characterization of a tellurite based high numerical aperture magneto-optical glass fiber are presented. Different glass groups were investigated in terms of their structural, thermal, mechanical, optical and magnetic performance as a core/cladding pair and their refractive index contributions to the numerical aperture. A well matched core/cladding pair was selected: 75%TeO 2-20%ZnO-5%Na 2 O (mol.%) for core glass, 42%TeO 2-18%ZnO-15%K 2 O-20%Ge 2 O-5SiO 2 (mol.%) for cladding glass. The fibers have a good cross section and a numerical aperture as high as 0.9. The Verdet constant of this high numerical aperture fiber was close to that of bulk glass.
The Faraday rotation influence factors in tellurite-based glass and fibers were studied by experi... more The Faraday rotation influence factors in tellurite-based glass and fibers were studied by experiments and simulations. TeO 2-ZnO-Na 2 O-BaO glass family was fabricated and characterized in terms of the thermal and magneto-optical properties. Two core-cladding pairs for two fibers were selected from fabricated glasses. The Verdet constants of the glasses and fibers were measured at different wavelengths using a homemade optical bench, and the Verdet constant of fiber was close to that of the bulk glass. The influence from external factors (wavelength, laser power and magnetic field) and internal factors (thermal expansion coefficient difference, refractive index and Verdet constant of core and cladding) on Faraday rotation in fibers was investigated and discussed, and the purpose of this study is to improve the Faraday rotation in tellurite fibers for MO device applications both from internal material property match and external parameter configuration in measurement.
Seventh International Conference on Photonics and Imaging in Biology and Medicine, 2008
Micro-channels were fabricated in sodalime glass through imprinting, and then joined to a glass s... more Micro-channels were fabricated in sodalime glass through imprinting, and then joined to a glass slab by thermal assisted direct bonding (TADB). These techniques are simple and low cost, suitable for mass production of micro-fluidic devices. The joined samples were characterized before and after TADB by optical microscopy, profilometer, SEM, shear strength test and Vickers hardness test. The integrity of channels
ABSTRACT Laser writing attached many attentions for fabrication micro-channels in microfluidics d... more ABSTRACT Laser writing attached many attentions for fabrication micro-channels in microfluidics devices and lab-on-chip devices for biomedical applications. In this study, micro-channels were fabricated on different materials as masters using nanosecond diode-pumped solid state (DPSS) laser writing for imprinting on glass and polymer microfluidics devices. Good quality microstructures were fabricated on silicon, nickel alloy, cooper/brass and alumina, respectively by laser writing which proved that the nanosecond DPSS laser is suitable for rapid prototyping and rapid manufacturing of surface microstructures on different substrates as mask-less exposure system of imprinting.
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