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Cordierite ceramic body having low thermal expansion coefficient, process for producing the same, and method of evaluating cordierite composition
Cordierite ceramic body having low thermal expansion coefficient, process for producing the same, and method of evaluating cordierite composition
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机译:热膨胀系数低的堇青石陶瓷体,其制造方法及堇青石组成的评价方法
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摘要
A process for producing a cordierite ceramic body by using a reclaimed cordierite composition for a cordierite ceramic article which has a composition similar to that of the cordierite ceramic body. The process includes the steps of: forming a desired formed body under a pressure by using a starting material which includes the recovered reclaimed cordierite composition, or a mixture of the reclaimed cordierite composition and a fresh cordierite composition; firing the formed body at a temperature between 1280°-1330° C. into a sample of the cordierite ceramic body; measuring a reaction ratio (R) between the amount of protoenstatite and cordierite crystals present in the sample; and formulating the starting material so that the reaction ratio (R) is 0. 3 or less.
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