Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Low-thermal-expansion aluminum titanate ceramic and preparation method thereof
The invention relates to low-thermal-expansion aluminum titanate ceramic and a preparation method thereof. A ceramic body crystal phase in the low-thermal-expansion aluminum titanate ceramic comprises an aluminum titanate phase and a celsian phase, the thermal expansion coefficient is smaller than 2 * 10 <-6 >/DEG C, the porosity of the ceramic body is 30-50%, the median pore diameter of the ceramic body is 10-20 microns, and the ceramic body is of a honeycomb structure. The preparation method comprises the following steps: uniformly mixing aluminum oxide, titanium oxide, silicon oxide, a barium oxide source and a stabilizer to obtain a mixture A, and uniformly mixing the mixture A, a plasticizer, a dispersant, an extrusion aid and a pore forming agent to obtain a mixture B; adding an organic solvent and water into the mixture B, and uniformly stirring to obtain pug C; carrying out extrusion molding on the pug C to obtain a honeycomb ceramic green body; and drying and sintering the honeycomb ceramic green body to obtain the low-thermal-expansion aluminum titanate honeycomb porous ceramic. The low-thermal-expansion aluminum titanate honeycomb porous ceramic disclosed by the invention has the advantages of low thermal expansion rate, high porosity, uniform pore size distribution and relatively high strength.
本发明涉及一种低热膨胀钛酸铝陶瓷及其制备方法。本发明低热膨胀钛酸铝陶瓷中陶瓷体晶相包括钛酸铝相和钡长石相，热膨胀系数小于2×10‑6/℃，陶瓷体孔隙率为30‑50％，陶瓷体中值孔径为10‑20μm，陶瓷体为蜂窝结构。制备方法包括：将氧化铝、氧化钛、氧化硅、氧化钡源和稳定剂混合均匀得到混合物A，混合物A、塑性剂、分散剂、挤压助剂和造孔剂混合均匀得到混合物B；将有机溶剂和水加入到混合物B中搅拌均匀得到泥料C；将泥料C挤压成型得到蜂窝陶瓷生坯；蜂窝陶瓷生坯干燥后烧结得到低热膨胀钛酸铝蜂窝多孔陶瓷。本发明低热膨胀钛酸铝蜂窝多孔陶瓷具有低热膨胀率、高孔隙率、孔径分布均匀和较高的强度。
Low-thermal-expansion aluminum titanate ceramic and preparation method thereof
The invention relates to low-thermal-expansion aluminum titanate ceramic and a preparation method thereof. A ceramic body crystal phase in the low-thermal-expansion aluminum titanate ceramic comprises an aluminum titanate phase and a celsian phase, the thermal expansion coefficient is smaller than 2 * 10 <-6 >/DEG C, the porosity of the ceramic body is 30-50%, the median pore diameter of the ceramic body is 10-20 microns, and the ceramic body is of a honeycomb structure. The preparation method comprises the following steps: uniformly mixing aluminum oxide, titanium oxide, silicon oxide, a barium oxide source and a stabilizer to obtain a mixture A, and uniformly mixing the mixture A, a plasticizer, a dispersant, an extrusion aid and a pore forming agent to obtain a mixture B; adding an organic solvent and water into the mixture B, and uniformly stirring to obtain pug C; carrying out extrusion molding on the pug C to obtain a honeycomb ceramic green body; and drying and sintering the honeycomb ceramic green body to obtain the low-thermal-expansion aluminum titanate honeycomb porous ceramic. The low-thermal-expansion aluminum titanate honeycomb porous ceramic disclosed by the invention has the advantages of low thermal expansion rate, high porosity, uniform pore size distribution and relatively high strength.
本发明涉及一种低热膨胀钛酸铝陶瓷及其制备方法。本发明低热膨胀钛酸铝陶瓷中陶瓷体晶相包括钛酸铝相和钡长石相，热膨胀系数小于2×10‑6/℃，陶瓷体孔隙率为30‑50％，陶瓷体中值孔径为10‑20μm，陶瓷体为蜂窝结构。制备方法包括：将氧化铝、氧化钛、氧化硅、氧化钡源和稳定剂混合均匀得到混合物A，混合物A、塑性剂、分散剂、挤压助剂和造孔剂混合均匀得到混合物B；将有机溶剂和水加入到混合物B中搅拌均匀得到泥料C；将泥料C挤压成型得到蜂窝陶瓷生坯；蜂窝陶瓷生坯干燥后烧结得到低热膨胀钛酸铝蜂窝多孔陶瓷。本发明低热膨胀钛酸铝蜂窝多孔陶瓷具有低热膨胀率、高孔隙率、孔径分布均匀和较高的强度。
Low-thermal-expansion aluminum titanate ceramic and preparation method thereof
一种低热膨胀钛酸铝陶瓷及其制备方法
CHEN QINGHUA (Autor:in) / CAO JIANGFENG (Autor:in) / YAN TINGTING (Autor:in) / NIE DA (Autor:in) / WANG HAO (Autor:in)
29.04.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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