リチアセラミックス (β-Eucryptite) 組成における熱処理が膨張係数に及ぼす影響

概要

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Thermal expansion properties of sintered β-eucryptite are often changed by its sintering condition, cooling condition and reheating condition.This work intended to stabilize these unstable thermal expansion properties of sintered β-eucryptite and investigated the reheating condition.Specimens which were sintered at the same time, were heat-treated under various conditions and the change of thermal expansion coefficient was examined. The main results were obtained as follows.1) The most suitable heat-treatment temperature was 800°C.2) Keeping for two hours and a half at 800°C was suitabl for stabilization of thermal expansion properties.3) Even a sample which was stabilized by heat-treatment at 800°C for two hours and a half, varied its thermal expansion properties by quenching from the high temperature above 800°C.4) The sample which was quenched from the high temperature above 800°C and changed its thermal expansion properties, did not turn back to its initial thermal expansion properties, even if being heat-treated two hours and a half at 800°C again.
社団法人日本セラミックス協会の論文
1966-04-01