Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alumina fiber porous heat insulation tile prepared based on aluminum phosphate binder and method
The invention discloses an aluminum phosphate binder-based alumina fiber porous heat insulation tile and a method thereof. The method comprises the following steps: sieving chopped alumina fibers with a standard mesh sieve to obtain undersize alumina fibers; mixing polyacrylamide with deionized water to prepare a polyacrylamide aqueous solution; placing phosphoric acid and aluminum hydroxide in an oil bath pan according to a certain molar ratio for reaction to obtain an aluminum phosphate binder; mixing, stirring and uniformly dispersing the undersize chopped fibers, a polyacrylamide aqueous solution and an aluminum phosphate binder to obtain fiber slurry; dehydrating, polymerizing, gluing and curing the fiber slurry to obtain a dry blank of the ceramic heat insulation tile; and degumming and sintering the ceramic heat insulation tile dry blank to obtain the alumina fiber porous heat insulation tile. The invention overcomes the technical problems of thermal migration of the binder in the alumina fiber thermal insulation tile and reaction with the fiber matrix at high temperature, has the advantages of low density, porosity, high strength and the like, can bear high temperature, and has better application prospects in thermal protection systems of high-speed aerospace crafts.
本发明公开了一种基于磷酸铝粘结剂制备氧化铝纤维多孔隔热瓦及方法，将短切氧化铝纤维过标准目筛得到筛下氧化铝纤维；将聚丙烯酰胺与去离子水混合配制聚丙烯酰胺水溶液；将磷酸与氢氧化铝以一定摩尔比置于油浴锅中反应，得到磷酸铝粘结剂；将筛下短切纤维、聚丙烯酰胺水溶液、磷酸铝粘结剂混合搅拌分散均匀，得到纤维浆料；将纤维浆料进行脱水聚合胶粘固化，得到陶瓷隔热瓦干胚；将陶瓷隔热瓦干胚进行排胶烧结，得到氧化铝纤维多孔隔热瓦。本发明克服了氧化铝纤维隔热瓦中粘结剂热迁移和高温下与纤维基体发生反应的技术问题，具有低密、多孔和高强等优点，且能承受高温，在高速航天飞行器热防护系统中具有较好的应用前景。
Alumina fiber porous heat insulation tile prepared based on aluminum phosphate binder and method
The invention discloses an aluminum phosphate binder-based alumina fiber porous heat insulation tile and a method thereof. The method comprises the following steps: sieving chopped alumina fibers with a standard mesh sieve to obtain undersize alumina fibers; mixing polyacrylamide with deionized water to prepare a polyacrylamide aqueous solution; placing phosphoric acid and aluminum hydroxide in an oil bath pan according to a certain molar ratio for reaction to obtain an aluminum phosphate binder; mixing, stirring and uniformly dispersing the undersize chopped fibers, a polyacrylamide aqueous solution and an aluminum phosphate binder to obtain fiber slurry; dehydrating, polymerizing, gluing and curing the fiber slurry to obtain a dry blank of the ceramic heat insulation tile; and degumming and sintering the ceramic heat insulation tile dry blank to obtain the alumina fiber porous heat insulation tile. The invention overcomes the technical problems of thermal migration of the binder in the alumina fiber thermal insulation tile and reaction with the fiber matrix at high temperature, has the advantages of low density, porosity, high strength and the like, can bear high temperature, and has better application prospects in thermal protection systems of high-speed aerospace crafts.
本发明公开了一种基于磷酸铝粘结剂制备氧化铝纤维多孔隔热瓦及方法，将短切氧化铝纤维过标准目筛得到筛下氧化铝纤维；将聚丙烯酰胺与去离子水混合配制聚丙烯酰胺水溶液；将磷酸与氢氧化铝以一定摩尔比置于油浴锅中反应，得到磷酸铝粘结剂；将筛下短切纤维、聚丙烯酰胺水溶液、磷酸铝粘结剂混合搅拌分散均匀，得到纤维浆料；将纤维浆料进行脱水聚合胶粘固化，得到陶瓷隔热瓦干胚；将陶瓷隔热瓦干胚进行排胶烧结，得到氧化铝纤维多孔隔热瓦。本发明克服了氧化铝纤维隔热瓦中粘结剂热迁移和高温下与纤维基体发生反应的技术问题，具有低密、多孔和高强等优点，且能承受高温，在高速航天飞行器热防护系统中具有较好的应用前景。
Alumina fiber porous heat insulation tile prepared based on aluminum phosphate binder and method
一种基于磷酸铝粘结剂制备氧化铝纤维多孔隔热瓦及方法
XIAO ZHICHAO (Autor:in) / WANG JUYUAN (Autor:in) / GUAN JIADA (Autor:in) / WU DONGSHENG (Autor:in) / JIN JING (Autor:in) / WANG JIPING (Autor:in) / XIA HONGYAN (Autor:in)
28.06.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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