The behavior of the Cu-Al-Si-O system was investigated in the temperature range of 800°-1150°C. X... more The behavior of the Cu-Al-Si-O system was investigated in the temperature range of 800°-1150°C. X-ray diffraction, infrared spectroscopy, diffusive reflectance, and electron microscopy were applied to obtain information about the influence of sintering, crystallization, and chemical reaction, each of which determines the color of the material. Definition of the artificial term "engobe," opposite to the term "glaze," was possible using copper(II) oxide (CuO) as its indicator. The detected chemical processes render possible explanations about the traditional way of ceramic painting during the 16th century and support the knowledge transfer from the viewpoint of history and that of natural science, as attempted by "archaeometry."
Since the discovery of fullerenes in 1985, the chemistry of sp 2 -hybridized nanostructured carbo... more Since the discovery of fullerenes in 1985, the chemistry of sp 2 -hybridized nanostructured carbon has received increasing attention both from a fundamental point of view and for potential applications. A large variety of new fullerenerelated materials (giant fullerenes, nanotubes, nanospheres, nanocones, nanofolders, nanobundles, onion-like carbons (OLCs)) have been synthesized. [2] Their unique chemical and physical properties suggest novel applications, which include nanoscale engineering and electronics, optoelectronic sensors, three-dimensional composite materials, microfilters, magnetic materials, and catalysis. [3] Current research on OLCs is confined to the development of synthesis methods and to the description of physical and chemical properties. [4] These closed, spherical, carbon shells, however, could also provide interesting catalytic properties as a result of the almost perfect graphite network with a high degree of curvature.
The behavior of the Cu-Al-Si-O system was investigated in the temperature range of 800°-1150°C. X... more The behavior of the Cu-Al-Si-O system was investigated in the temperature range of 800°-1150°C. X-ray diffraction, infrared spectroscopy, diffusive reflectance, and electron microscopy were applied to obtain information about the influence of sintering, crystallization, and chemical reaction, each of which determines the color of the material. Definition of the artificial term "engobe," opposite to the term "glaze," was possible using copper(II) oxide (CuO) as its indicator. The detected chemical processes render possible explanations about the traditional way of ceramic painting during the 16th century and support the knowledge transfer from the viewpoint of history and that of natural science, as attempted by "archaeometry."
Since the discovery of fullerenes in 1985, the chemistry of sp 2 -hybridized nanostructured carbo... more Since the discovery of fullerenes in 1985, the chemistry of sp 2 -hybridized nanostructured carbon has received increasing attention both from a fundamental point of view and for potential applications. A large variety of new fullerenerelated materials (giant fullerenes, nanotubes, nanospheres, nanocones, nanofolders, nanobundles, onion-like carbons (OLCs)) have been synthesized. [2] Their unique chemical and physical properties suggest novel applications, which include nanoscale engineering and electronics, optoelectronic sensors, three-dimensional composite materials, microfilters, magnetic materials, and catalysis. [3] Current research on OLCs is confined to the development of synthesis methods and to the description of physical and chemical properties. [4] These closed, spherical, carbon shells, however, could also provide interesting catalytic properties as a result of the almost perfect graphite network with a high degree of curvature.
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