Study on Moisture Absorption Modification of Al(H2PO4)3/Al2O3 Composite
TAO Liushi1,2, LI Na3, ZHANG Shichao1, WANG Hua1, PAN Chuancai3, AI Bing1, WANG Chunpeng1
1 China Building Materials Academy, Beijing 100024, China 2 College of Chemistry,Tianjin Normal University, Tianjin 300387, China 3 China Building Material Test & Certification Group Co., Ltd, Beijing 100024, China
Abstract: Aluminum dihydrogen phosphate, chromium aluminum phosphate and other inorganic materials as high temperature binders have the advantages of low curing shrinkage, high strength and high temperature resistance, which are widely used in metallurgy, chemical industry and aerospace fields. However, they can absorb water vapor in the air, thus reducing the strength and integrity of the materials. In order to improve the hygroscopicity in the atmosphere, a kind of composite sealing material with high temperature resistance, low thermal conductivity and thermal radiation shielding was prepared by using organic polymer polyether sulfone, inorganic additive zirconia powder and thermal radiation shielding agent gold powder. It was applied in the moisture absorption modification of Al(H2PO4)3/Al2O3 composite hard materials. By comparing the SEM and moisture absorption curves of the samples before and after modification, the modification effect of the composite sealing material on the moisture absorption performance of the matrix material was tested. In order to study the influence of the sealing material on the thermal insulation and strength of the matrix material, the changes of the thermal conductivity and bending strength of the samples before and after the modification were further analyzed. The results show that PES can form a dense sealing film on the surface of the matrix material, which can not only isolate the water vapor in the air, but also improve the bending strength of the material. At the same time, the addition of gold powder can form a radiation shielding layer, thus reducing the thermal conductivity.
陶柳实, 李娜, 张世超, 王华, 潘传才, 艾兵, 王春朋. Al(H2PO4)3/Al2O3复合硬质材料吸湿改性研究[J]. 材料导报, 2021, 35(z2): 94-96.
TAO Liushi, LI Na, ZHANG Shichao, WANG Hua, PAN Chuancai, AI Bing, WANG Chunpeng. Study on Moisture Absorption Modification of Al(H2PO4)3/Al2O3 Composite. Materials Reports, 2021, 35(z2): 94-96.
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2021, Vol. 35 
