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A platform for research: civil engineering, architecture and urbanism
Large-size quartz ceramic part and preparation method thereof
The invention relates to a large-size quartz ceramic part and a preparation method thereof. The preparation method comprises the following steps: mixing quartz powder, polysiloxane and a silicon-containing solvent to prepare ceramic slurry with a high solid content; injecting the ceramic slurry into a forming mold, curing to obtain a biscuit; and carrying out a heat treatment on the biscuit in anoxidizing atmosphere or oxygen, and sintering. Through raw material design, the obtained ceramic slurry is high in silicon dioxide content; the curing shrinkage is low, particularly, when polysiloxaneis subjected to a heat treatment in an oxidizing atmosphere; carbon atoms are oxidized into carbon dioxide and removed; Si atoms are converted into silicon dioxide, after the heat treatment, the density of silicon dioxide is very high even if silicon dioxide is not shrunk; the ceramic part can be used in most application environments, the density and strength of an obtained green body of the ceramic slurry are effectively improved through the preparation technology by means of the design of the preparation technology, the firing temperature and shrinkage rate are reduced, the strength of theobtained biscuit is larger than 50 MPa, the firing shrinkage is smaller than or equal to 1%, and the ceramic strength is larger than or equal to 50 MPa.
本发明涉及一种大尺寸石英陶瓷部件及其制备方法。包括以下步骤：将石英粉体、聚硅氧烷、含硅溶剂的混合，制成高固相含量的陶瓷料浆；将陶瓷料浆注入成型模具中，固化后得到的素坯；将素坯在氧化气氛或氧气下进行热处理，经烧结即得。通过原料设计，所得陶瓷浆料的二氧化硅含量高，固化收缩低，尤其是聚硅氧烷在氧化气氛中热处理时，碳原子氧化成二氧化碳排除，Si原子变成二氧化硅，热处理后即使不收缩二氧化硅致密度也已很高，完全可以满足大多数的使用环境，加之通过制备工艺的设计，使所述陶瓷浆料通过该制备技术有效提高了所得坯体的密度和强度，降低了烧成温度、收缩率，所得素坯强度＞50MPa，烧成收缩≤1％，陶瓷强度≥50MPa。
Large-size quartz ceramic part and preparation method thereof
The invention relates to a large-size quartz ceramic part and a preparation method thereof. The preparation method comprises the following steps: mixing quartz powder, polysiloxane and a silicon-containing solvent to prepare ceramic slurry with a high solid content; injecting the ceramic slurry into a forming mold, curing to obtain a biscuit; and carrying out a heat treatment on the biscuit in anoxidizing atmosphere or oxygen, and sintering. Through raw material design, the obtained ceramic slurry is high in silicon dioxide content; the curing shrinkage is low, particularly, when polysiloxaneis subjected to a heat treatment in an oxidizing atmosphere; carbon atoms are oxidized into carbon dioxide and removed; Si atoms are converted into silicon dioxide, after the heat treatment, the density of silicon dioxide is very high even if silicon dioxide is not shrunk; the ceramic part can be used in most application environments, the density and strength of an obtained green body of the ceramic slurry are effectively improved through the preparation technology by means of the design of the preparation technology, the firing temperature and shrinkage rate are reduced, the strength of theobtained biscuit is larger than 50 MPa, the firing shrinkage is smaller than or equal to 1%, and the ceramic strength is larger than or equal to 50 MPa.
本发明涉及一种大尺寸石英陶瓷部件及其制备方法。包括以下步骤：将石英粉体、聚硅氧烷、含硅溶剂的混合，制成高固相含量的陶瓷料浆；将陶瓷料浆注入成型模具中，固化后得到的素坯；将素坯在氧化气氛或氧气下进行热处理，经烧结即得。通过原料设计，所得陶瓷浆料的二氧化硅含量高，固化收缩低，尤其是聚硅氧烷在氧化气氛中热处理时，碳原子氧化成二氧化碳排除，Si原子变成二氧化硅，热处理后即使不收缩二氧化硅致密度也已很高，完全可以满足大多数的使用环境，加之通过制备工艺的设计，使所述陶瓷浆料通过该制备技术有效提高了所得坯体的密度和强度，降低了烧成温度、收缩率，所得素坯强度＞50MPa，烧成收缩≤1％，陶瓷强度≥50MPa。
Large-size quartz ceramic part and preparation method thereof
一种大尺寸石英陶瓷部件及其制备方法
LUAN QIANG (author) / WANG HONGSHENG (author) / WEI QIHONG (author) / CHENG ZHIQIANG (author) / ZHU BAOXIN (author) / ZHANG PINGPING (author) / LIU XIAOJUN (author) / WEN GUANGWU (author)
2020-09-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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