| Synthesis and microwave dielectric properties of Si/C/B powder |
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| 引用本文： | 李智敏 杜红亮 刘晓魁 罗发 周万城. Synthesis and microwave dielectric properties of Si/C/B powder[J]. 中国有色金属学会会刊, 2006, 16(B02): 470-473 |
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| 作者姓名： | 李智敏 杜红亮 刘晓魁 罗发 周万城 |
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| 作者单位： | State Key Laboratory of Solidification Processing, Northwestem Polytechnical University, Xi＇an 710072, China |
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| 基金项目： | Project（50572090） supported by the National Natural Science Foundation of China |
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| 摘 要： | Si/C/B powders were synthesized by carbothermal reduction of xerogels containing boride. Colorless, transparent and monolithic gel was obtained by using tetraethoxysilane, saccharose, tributyl borate, ethanol and distilled water as starting materials. When the xerogel was fired at 1 600 ℃ in the static argon atmosphere, the XRD pattern commences to show the crystallite peak corresponding with C. β-SiC was synthesized at 1 700 ℃, but amorphous remainders could not be eliminated completely. The XRD results show that the boron possibly enters into the silica network, leading to the formation of borosiloxane. Microstructure offl-SiC powders consists of agglomerated particles with diameters ranging from 30 to 100 nm. Though the samples prepared at 1 600 ℃ and 1 700 ℃ have better dielectric loss tangent than the sample at 1 500 ℃ due to exiting crystalline material, the dielectric constant and dielectric loss tangent of three samples reveal lower values.
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| 关 键 词： | Si/C/B粉末 碳化硅 合成 碳热还原法 微波介电性质 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-04-25 |
Synthesis and microwave dielectric properties of Si/C/B powder |
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| LI Zhi-min, DU Hong-liang, LIU Xiao-kui, LUO Fa, ZHOU Wan-cheng. Synthesis and microwave dielectric properties of Si/C/B powder[J]. Transactions of Nonferrous Metals Society of China, 2006, 16(B02): 470-473 |
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| Authors: | LI Zhi-min DU Hong-liang LIU Xiao-kui LUO Fa ZHOU Wan-cheng |
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