Ceramics-Silikáty 36, (1) 15 - 19 (1992) |
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THE EFFECT OF TEXTURE ON THE THERMAL DIFFUSIVITY OF A CERAMIC MATERIAL
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Kalužná Marta 1, Vozár Libor 2, Gembarovič Jozef 2,
Kaprálik Ivan 3
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1 Faculty of the Mechanical Engineering of the Slovak Technical University, Department of Physics, Nám. Slobody 17, 812 31 Bratislava, Czechoslovakia
2 Pedagogical Faculty, Department of Physics, Lomonosovova 1, 949 74 Nitra, Czechoslovakia
3 Institute of Inorganic Chemistry, Slovak Academy of Sciences, 841 05 Bratislava, Czechoslovakia
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The paper presents the results of examination of anisotropic properties of thermal diffusivity for both vacuum and isostatically pressed raw technical porcelain over the low-temperature range, the anisotropy being due to the technological texture. In the case of isostatically pressed material, the thermal diffusivity does not exhibit any directional dependence owing to the absence of technological texture. With vacuum-pressed material, the thermal diffusivity is strongly anisotropic as a result of the presence of a circular fibriform texture at the circumference of cylindrical pressings. Evidence for this finding was provided by X-ray diffraction analysis. |
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