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High-temperature-resistant zirconium oxide composite thermal insulation material with mesoporous structure and preparation method thereof
The invention discloses a high-temperature-resistant zirconium oxide composite thermal insulation material with a mesoporous structure and a preparation method thereof. The preparation method comprises the following steps: firstly, dispersing submicron oxide crystal fibers calcined at high temperature into an aqueous solution, and performing vacuumizing, pressurizing and drying to obtain a fiber preform; then preparing an alcoholic solution containing an organic polyzirconium precursor, adding a basic catalyst, and performing uniform stirring; and immersing a dried preform in the solution, heating to 70-90 DEG C, performing curing to obtain a composite material wet blank, and performing soaking and drying to obtain the ZrO2 composite thermal insulation material containing the mesoporous structure. The hydrolysis condensation reaction activity of the zirconium precursor is slowed down by using the base catalyst, and a blocky ZrO2 structure containing a large number of mesoporous structures is obtained. According to the invention, the high-temperature-resistant crystal fibers with a submicron diameter are used as a compounding component, the interface stress of the fibers and the mesoporous ZrO2 matrix is low, the fibers and the mesoporous ZrO2 matrix are tightly combined, and when ZrO2 is sintered, the fiber reinforcement can more effectively inhibit sintering shrinkage.
本发明公开了一种具有介孔结构的耐高温氧化锆复合隔热材料及其制备方法。本发明首先将高温煅烧的亚微米氧化物晶体纤维分散在水溶液中，抽真空加压和干燥获得纤维预制体；然后配制含有有机聚锆前驱体的醇溶液，加入碱性催化剂搅拌均匀；再在上述溶液中浸入干燥好的预制体，升温至70‑90℃固化获得复合材料湿坯，然后浸泡、干燥获得最终含有介孔结构的ZrO2复合隔热材料。本发明利用碱催化剂减缓锆前驱体的水解‑缩合反应活性，获得含有大量介孔结构的块状ZrO2结构。本发明使用直径为亚微米级的耐高温晶体纤维作为复合成分，纤维与介孔ZrO2基体的界面应力低，结合紧密，当ZrO2发生烧结时，纤维增强体更有效的抑制烧结收缩。
High-temperature-resistant zirconium oxide composite thermal insulation material with mesoporous structure and preparation method thereof
The invention discloses a high-temperature-resistant zirconium oxide composite thermal insulation material with a mesoporous structure and a preparation method thereof. The preparation method comprises the following steps: firstly, dispersing submicron oxide crystal fibers calcined at high temperature into an aqueous solution, and performing vacuumizing, pressurizing and drying to obtain a fiber preform; then preparing an alcoholic solution containing an organic polyzirconium precursor, adding a basic catalyst, and performing uniform stirring; and immersing a dried preform in the solution, heating to 70-90 DEG C, performing curing to obtain a composite material wet blank, and performing soaking and drying to obtain the ZrO2 composite thermal insulation material containing the mesoporous structure. The hydrolysis condensation reaction activity of the zirconium precursor is slowed down by using the base catalyst, and a blocky ZrO2 structure containing a large number of mesoporous structures is obtained. According to the invention, the high-temperature-resistant crystal fibers with a submicron diameter are used as a compounding component, the interface stress of the fibers and the mesoporous ZrO2 matrix is low, the fibers and the mesoporous ZrO2 matrix are tightly combined, and when ZrO2 is sintered, the fiber reinforcement can more effectively inhibit sintering shrinkage.
本发明公开了一种具有介孔结构的耐高温氧化锆复合隔热材料及其制备方法。本发明首先将高温煅烧的亚微米氧化物晶体纤维分散在水溶液中，抽真空加压和干燥获得纤维预制体；然后配制含有有机聚锆前驱体的醇溶液，加入碱性催化剂搅拌均匀；再在上述溶液中浸入干燥好的预制体，升温至70‑90℃固化获得复合材料湿坯，然后浸泡、干燥获得最终含有介孔结构的ZrO2复合隔热材料。本发明利用碱催化剂减缓锆前驱体的水解‑缩合反应活性，获得含有大量介孔结构的块状ZrO2结构。本发明使用直径为亚微米级的耐高温晶体纤维作为复合成分，纤维与介孔ZrO2基体的界面应力低，结合紧密，当ZrO2发生烧结时，纤维增强体更有效的抑制烧结收缩。
High-temperature-resistant zirconium oxide composite thermal insulation material with mesoporous structure and preparation method thereof
具有介孔结构的耐高温氧化锆复合隔热材料及其制备方法
LIU BENXUE (author) / YI XIBIN (author) / LI ZHANFENG (author) / LIU XIAOCHAN (author) / ZHANG XIN'EN (author) / ZHANG JING (author) / ZHAO XINFU (author) / YU SHIMO (author)
2021-04-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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