Materials Reports  2021, Vol. 35 Issue (z2): 72-74 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Effects of ZnO and MgO on Moisture Absorption Properties of Aluminum Phosphate Adhesives |
| AI Bing1, BAO Yujia2, ZHANG Shichao1, SUN Xiankai1, SUN Haoran1, TAO Liushi1, WANG Chunpeng1
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1 China Building Materials Academy, Beijing 100024, China
2 Beijing Institute of Power Machinery, Beijing 100074, China |
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Abstract Aluminum phosphate adhesive has many advantages, such as low curing temperature, non-toxic, high bond strength, stable structure at high temperature, etc. It can bond metals and ceramics, and can also be used as a refractory and composite body. It has been widely used in construction and aerospace fields. In this paper, aluminum phosphate adhesive was prepared by H3PO4 and Al(OH)3, ZnO or MgO was added as the curing agent, the addition amount of ZnO and MgO was adjusted at 1%~5%. The effect of the amount of curing agent on the properties of phosphate adhesives was studied. Alumina fiber thermal insulation materials were prepared by using the modified aluminum phosphate adhesives and alumina fiber. The curing temperature of the adhesives was studied by differential scanning calorimetry (DSC). The structure of heat insulation material was analyzed by scanning electron microscope. The results showed that the addition of ZnO and MgO could reduce the curing temperature of adhesive and promote the cross-linking curing of adhesives. By adding 5wt%ZnO and 5wt%MgO could reduce the curing temperature of phosphate adhesives from 254 ℃ to 172 ℃ and 161 ℃, respectively. Among them, by adding 5%MgO can reduce the hygroscopic weight gain ratio of adhesive from 13.5% to 6.3%.
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Published: 09 December 2021
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| About author:: Bing Ai, Senior Engineer, received her Ph.D. degree in materials science and engineering from Wuhan University of Technology (WHUT) in Dec. 2017. She worked at China Building Materials Academy after gra-duation, she has published more than 8 journal papers, and applied 5 national invention patents. Her research interests mainly focus on the preparation & fundamental theory & application about the thermal insulation materials. |
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