| 摘要 |
PROBLEM TO BE SOLVED: To produce a low-temp. calcined ceramic used in pottery for pleasure or in accessories, which is sintered and densified at a low temp. of <=1000 deg.C in a simple nichrome-wire electric furnace, etc., while keeping the shape of the molding and which is not softened or deformed below 1200 deg.C. SOLUTION: The kaolinitic or hallowysitic fine-grain kaoline or clay is mixed with the calcium carbonate powder having <=2.0μm average grain diameter in 62:38 to 82:18 weight ratio of the ignited anhydrous kaoline to CaO, and an SiO2 -base powder of quartzite, etc., is further added by 15-35wt.%. The hydrous kneaded material or dry powder with the admixture as the basic component is molded, calcined and easily sintered at a relatively low temp. of <=1000 deg.C to obtain a ceramic with the water absorption decreased practically to zero while keeping the shape of the molding, and a unique low-temp. calcined ceramic capable of novel color development or simultaneous calcination with silver, etc., is produced.
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