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摘要
An AlPO(4)-SiO(2) powder with a composition of Al:P:Si=1.5:1:0.1 was synthesized by the sol-gel method using aluminum nitrate, phosphate acid, and tetraethoxysilane. The structural evolution of this material was characterized by thermal gravimetric analysis-differential scanning calorimetry, Fourier transform infrared, and X-ray diffraction. By adding silica in AlPO(4), the sinterability of the AlPO(4) was enhanced because of the reactions between excess alumina and silica to form mullite. The sintered composites have a high strength and good dielectric properties at 10 GHz. Because of the formation of mullite at high temperatures, the composites showed a hydrophobic property. These unique properties indicate that the sintered AlPO(4)-mullite composites are suitable for the radome application.
- 出版日期2009
- 单位西北工业大学
