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发明公开
CN105271762A 用于制备二硅酸锂微晶玻璃的组合物及其制备方法 无效 - 驳回 复审申请

用于制备二硅酸锂微晶玻璃的组合物及其制备方法
摘要：
本申请公开了一种用于制备二硅酸锂微晶玻璃的组合物及其制备方法，该组合为包括：SiO2 40-60；Li2O 20-40；K2O 3-10；P2O5 2-10；Al2O3 0-5；ZrO2 0-5；CeO2 0-5；CaO 0-5；MgO 0-5；B2O3 0-5；ZnO 0-5；光敏剂0-5；荧光剂0-5；改性剂0-5；着色剂0-10。本发明还提供一种制备二硅酸锂微晶玻璃的方法，包括：(1)：按质量百分比称量原料，将其装入混料机中，混料1min-2h；(2)：将混合好的原料，倒入铂金或铂铑坩埚中，于空气气氛或惰性气体中，加温至1350℃-1600℃时，保温0.5-4h；(3)将步骤二中经过保温的玻璃液冷却浇铸成型；(4)：将步骤三中所得成型产物，加热升温至600-900℃，保温0.5-60min，使其晶化，得到二硅酸锂微晶玻璃。本发明的材料具备了二次熔化后，透度、强度不发生变化，提高材料切削性。
摘要（英）：

The invention discloses a composition and method for preparing lithium disilicate glass ceramics. The composition is prepared from, by mass, 40-60 parts of SiO2, 20-40 parts of Li2O, 3-10 parts of K2O, 2-10 parts of P2O5, 0-5 parts of Al2O3, 0-5 parts of ZrO2, 0-5 parts of CeO2, 0-5 parts of CaO, 0-5 parts of MgO, 0-5 parts of B2O3, 0-5 parts of ZnO, 0-5 parts of photosensitizer, 0-5 parts of fluorescent agents, 0-5 parts of modifier and 0-10 parts of colorants. The invention also provides the method for preparing the lithium disilicate glass ceramics. The method comprises the steps that (1) raw materials are weighed according to the mass percentage and charged in a mixer to be mixed for 1min-2h; (2) the mixed raw materials are poured in a crucible made of platinum or platinum and rhodium, heated in an air atmosphere or an inert gas atmosphere to reach the temperature between 1350 DEG C and 1600 DEG C, and kept at the temperature for 0.5-4h; (3) glass liquid subjected to heat preservation in the step (2) is cooled and subjected to casting molding; (4) the molding product obtained in the step (3) is heated to the temperature between 600 DEG C and 900 DEG C and kept at the temperature for 0.5-60min for crystallization to obtain the lithium disilicate glass ceramics. The material has the advantages that the penetration and strength do not change after secondary melting, so that the cutting performance of the material is improved.

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