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公开(公告)号：US3809543A
公开(公告)日：1974-05-07
申请号：US22685772
申请日：1972-02-16
CPC分类号： C03B18/22 , C03B18/18 , C03B32/02 , C03C10/00 , C03C10/0027
摘要： THE INVENTION RELATES TO A METHOD OF MANUFACUTRING A FINE-GRAINED GLASS CERAMIC MATERIAL FROM A THERMALLY-CRYSTIALLIZABLE VITREOUS MATERIAL, WHICH MAY BE AN LI2OAL2O3-SIO, 2 COMPOSITION CONTAINING A NUCLEATIG AGENT SUCH AS P2O5, ZRO2 OR TIO2, IN WHICH METHOD THE MATERIAL IS SHAPED AND THREAFTER SUPPORTED THROUGHOUT THE SUBSEQUENT THERMAL PROCESSING, WHICH IS PREFERABLY EFFECTED ON A NON-WETTABLE SUPPORT SUCH AS A BATH OF MOLTEN METAL, E.G. TIN. THE THERMAL PROCESSING ESSENTIALLY COMPRISES SUBJECTING THE SHAPED MATERIAL TO A TEMPERATURE/TIME REGIME WHICH DEVELOPS WITHIN THE MATERIAL A UNIFORM DISPERSION OF EMBRYONIC CENTERS OF INCIPIENT CRYSTAL GROWTH, AND THEN RAPIDLY HEATING THE MATERIAL AT A CONTROLLED RATE TO A PREDETERMINED CRYSTALLIZATION TEMPERATURE TO EFFECT FINE-GRAINED CRYSTAL GROWTH ON THOSE CENTERS WHILE THE VISCOSITY OF THE GLASSY MATRIX OF THE CRYSTALLIZING MATERIAL IS AT A VALUE WHICH PERMITS RAPID STRESS RELAXATION.
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公开(公告)号：US3804608A
公开(公告)日：1974-04-16
申请号：US25616872
申请日：1972-05-23
CPC分类号： C03C10/00
摘要： The invention relates to a method of manufacturing a finegrained glass ceramic material from a thermally crystallisable vitreous material, which may be a composition of the SiO2-Al2O3Li2O or SiO2-Al2O3-BaO or SiO2-Al2O3-MgO systems containing a nucleating agent such as P2O5, ZrO2 or TiO2, in which method the material is melted, shaped to a desired form and thereafter supported throughout the subsequent thermal processing, which comprises rapidly cooling the shaped material to a temperature in the range which is conducive to fine-grained crystal growth in the material and regulating heat extraction from the material while in that range to induce the required degree of crystal growth, and then continuing cooling of the glass ceramic so produced. In some cases it is preferred to hold the temperature at a substantially constant value in that range for a time, generally not more than 30 minutes. In other cases heat extraction may be continued without interruption during crystallisation.
摘要翻译： 本发明涉及一种由可热结晶玻璃材料制造细晶玻璃陶瓷材料的方法，该方法可以是包含成核的SiO2-Al2O3-Li2O或SiO2-Al2O3-BaO或SiO2-Al2O3-MgO体系的组成 试剂如P 2 O 5，ZrO 2或TiO 2，其中该材料被熔化，成型为所需形式，然后在后续的热加工过程中被支撑，其包括将成形材料快速冷却到有利于精细加工的范围内的温度， 在材料中晶粒生长并调节材料中的热提取，同时在该范围内诱导所需的晶体生长程度，然后继续冷却所生产的玻璃陶瓷。 在某些情况下，优选将该温度保持在该范围内基本恒定的时间，通常不超过30分钟。 在其他情况下，在结晶过程中可以继续进行热提取而不中断。
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