| Al2O3和Y2O3包覆的SiC复合粒子制备 |
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| 引用本文： | 张巨先,杨静漪,高陇桥,侯耀永,李发.Al2O3和Y2O3包覆的SiC复合粒子制备[J].无机材料学报,1999,14(3). |
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| 作者姓名： | 张巨先 杨静漪 高陇桥 侯耀永 李发 |
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| 作者单位： | 1. 北京真空电子技术研究所,北京,100016
2. 青岛化工学院,青岛,266042 |
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| 摘 要： | 本文利用非均匀成核法，将Al（OH）3和Y（OH）3均匀地包匿在SiC粒子表面，制备出被覆Al2O3和Y2O3的SiC复合粒子．包覆Al（OH）3的SiC粒子，其等电点IEP的pH=3．4移至pH=7.3，再用Y（OH）3包覆表面被覆Al（OH）3的SiC复合粒子后，其等电点IEP又从pH=73移至pH=8.6左右．并且表面包覆的SiC粒子，其水悬浮液流变性质发生了变化．经盐酸滴定表明，涂层物质的包覆率可达95％以上．
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| 关 键 词： | 包覆 非均匀成核法 SiC复合粒子 包覆率 |
Preparation of Al2O3 and Y2O3-coated SiC Composite Particles |
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| ZHANG Ju-Xian,YANG Jing-Yi,GAO Long-Qiao,HOU Yao-Yong,LI Fa.Preparation of Al2O3 and Y2O3-coated SiC Composite Particles[J].Journal of Inorganic Materials,1999,14(3). |
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| Authors: | ZHANG Ju-Xian YANG Jing-Yi GAO Long-Qiao HOU Yao-Yong LI Fa |
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| Affiliation: | ZHANG Ju-Xian; YANG Jing-Yi; GAO Long-Qiao; HOU Yao-Yong; LI Fa (Beijing Vacuum Electronics Research Institute Beijing 100016 China)(Qingdao Institute of Chemical Technology Qingdao 266042 China) |
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| Abstract: | Al2O3and Y2O3-coated SiC composite particles were prepared from SiC coated uniformly with Al(OH)3 and Y(OH)3 by heterogeneous nucleation process. The IEP of as-received SiC is pH 3.4, that of Al(OH)3-coated SiC shift to pH 7.3. When Al(OH)3-coated SiC composite particles were coated with Y(OH)3, its IEP is about pH 8.6. In addition, the viscosity behavior of SiC was changed via coating. The coating ratio is over 95% according to the results of hydrochloric acid titration, that is, 95% of added coating materials can be coated on the surfaces of SiC particles by heterogeneous nucleation process. |
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| Keywords: | coating heterogeneous nucleation precess SiC composite particles coating ratio |
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