| 摘要 |
PURPOSE:To provide an inexpensive super thermal shock-resistant ceramic material capable of readily wiping off foulings by mixing a small amount of lithia based glass powder with Li2O.Al2O3-nSiO2 as a principal component in a specific proportion, forming and calcining the resultant mixture. CONSTITUTION:A lithia based (Li2O-Al2O3-SiO2 based) glass powder is used as part of raw materials and Li2O.Al2O3.nSiO2 (n is 1.8-12.5) in an amount of >=96wt.% based on the total amount of the raw material is used as a principal component to prepare a raw material powder so as to provide the ratio of Li2O/Al2O3 in the final composition within the range of 2-0.5. The prepared raw material powder is formed and calcined to produce a super thermal shock- resistant ceramic material. The resultant ceramic material has thermal shock resistance of >=800 deg.C temperature difference with surface gloss and excellent appearance, high bending strength and is suitably used as shallow pans, etc., of electric cookers. |
