新型Y2O3-SiO2增强ZrO2复合气凝胶的制备及性能研究

doi:10.3969/j.issn.1001-1935.2025.02.009

耐火材料 ›› 2025, Vol. 59 ›› Issue (2): 138-143.DOI: 10.3969/j.issn.1001-1935.2025.02.009

新型Y₂O₃-SiO₂增强ZrO₂复合气凝胶的制备及性能研究

李占峰, 隋学叶, 唐文哲, 刘瑞祥, 王蒙蒙

山东工业陶瓷研究设计院有限公司山东淄博 255000

收稿日期:2024-05-26 出版日期:2025-04-15 发布日期:2025-04-14
作者简介:李占峰:男,1996年生,硕士研究生,工程师。E-mail:17864197362@163.com

Preparation and properties of novel yttria-silica enhanced zirconia composite aerogels

Li Zhanfeng, Sui Xue-ye, Tang Wenzhe, Liu Ruixiang, Wang Mengmeng

First author’s address:Shandong Industrial Ceramic Research and Design Institute Co.,Ltd.,Zibo 255000,Shandong,China

Received:2024-05-26 Online:2025-04-15 Published:2025-04-14

摘要/Abstract

摘要： ZrO₂在高温下的相变会引发ZrO₂气凝胶的结构坍塌,为了提高ZrO₂气凝胶的高温稳定性,以低成本、无毒的巯基琥珀酸为凝胶促进剂,八水氧氯化锆、六水硝酸钇、正硅酸乙酯为前驱体,采用溶胶-凝胶法制备了Y₂O₃-SiO₂增强ZrO₂复合气凝胶,并加入莫来石纤维,制备了莫来石纤维复合Y₂O₃-SiO₂增强ZrO₂材料,研究了Y₂O₃和ZrO₂的物质的量比(分别为1∶40、1∶20、1∶10和1∶5)、SiO₂和ZrO₂的物质的量比(分别为1∶10、1∶5、3∶10 和2∶5)对ZrO₂气凝胶的凝胶时间、孔结构以及高温性能的影响。结果表明:Y₂O₃和SiO₂可有效缩短凝胶时间;掺入SiO₂后,气凝胶的纳米孔结构更加均匀,但是掺入Y₂O₃后,气凝胶的骨架变粗,表现出杂乱的纳米孔结构;Y₂O₃和SiO₂有效地阻碍了ZrO₂的高温相变,降低了ZrO₂的高温收缩率;制备Y₂O₃-SiO₂增强ZrO₂复合气凝胶的最佳配比为:n(Y₂O₃)∶n(SiO₂)∶n(ZrO₂)=1∶3∶10。

关键词: ZrO₂气凝胶, Y₂O₃, SiO₂, 隔热

Abstract: The phase transition of ZrO₂ at high temperatures causes structural collapse of ZrO₂ aerogels.To improve the high-temperature stability of ZrO₂ aerogels,Y₂O₃-SiO₂ enhanced ZrO₂ composite aerogels were prepared via the sol-gel method using low-cost and non-toxic mercaptosuccinic acid as a gel accelerator,and zirconium oxychloride octahydrate,yttrium nitrate hexahydrate,and tetraethyl orthosilicate as the precursors.Mullite fiber-Y₂O₃-SiO₂-reinforced ZrO₂ composites were also fabricated by adding mullite fibers.The effects of the molar ratios of Y₂O₃ to ZrO₂ (1∶40,1∶20,1∶10,and 1∶5),SiO₂ to ZrO₂ (1∶10,1∶5,3∶10,and 2∶5) on the gel time,pore structure,and high-temperature properties were investigated.The results show that:Y₂O₃ and SiO₂ can effectively shorten the gel time;SiO₂ doping leads to a more uniform nanoporous structure;Y₂O₃ doping causes coarser skeletons and disordered nanopores;Y₂O₃ and SiO₂ hinder the phase transition and reduce the shrinkage of ZrO₂ at high temperatures.The optimal ratio of Y₂O₃-SiO₂ enhanced ZrO₂ composite aerogels was n(Y₂O₃)∶n(SiO₂)∶n(ZrO₂)=1∶3∶10.

Key words: ZrO₂ aerogels, Y₂O₃, SiO₂, thermal insulation

中图分类号:

TQ175

李占峰, 隋学叶, 唐文哲, 刘瑞祥, 王蒙蒙. 新型Y₂O₃-SiO₂增强ZrO₂复合气凝胶的制备及性能研究[J]. 耐火材料, 2025, 59(2): 138-143.

Li Zhanfeng, Sui Xue-ye, Tang Wenzhe, Liu Ruixiang, Wang Mengmeng. Preparation and properties of novel yttria-silica enhanced zirconia composite aerogels[J]. Refractories, 2025, 59(2): 138-143.

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新型Y₂O₃-SiO₂增强ZrO₂复合气凝胶的制备及性能研究

Preparation and properties of novel yttria-silica enhanced zirconia composite aerogels

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