| 凝胶注模成型多孔Si3 N4 陶瓷及其性能 |
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| 引用本文： | 张健,王红洁,范锦鹏,冯志海,陈聪慧.凝胶注模成型多孔Si3 N4 陶瓷及其性能[J].宇航材料工艺,2011,41(2). |
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| 作者姓名： | 张健 王红洁 范锦鹏 冯志海 陈聪慧 |
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| 作者单位： | 1. 航天材料及工艺研究所,先进功能复合材料技术国防科技重点实验室,北京,100076
2. 西安交通大学,金属材料强度国家重点实验室,西安,710049 |
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| 基金项目： | 武器装备预先研究项目，国家自然科学基金 |
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| 摘 要： | 采用凝胶注模成型工艺制备出了具有低介电常数和高强度特性的多孔Si<,3>N<,4>陶瓷平板和锥形体样件,并对其微观结构、高温介电性能、透波率和弯曲强度等进行了测试与分析.结果表明:该方法获得的多孔Si<,3>N<,4>陶瓷具有低介电常数(2.3-2.8)、高弯曲强度(大于50 MPa)、高温介电性能稳定和透波率良好等优点.
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| 关 键 词： | 多孔Si3N4天线罩 凝胶注模 高温介电性能 透波材料 |
Fabrication and Properties of Porous Si3 N4 Ceramic by Gel Casting Technique |
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| Zhang Jian,Wang Hongjie,Fan Jinpeng,Feng Zhihai,Chen Conghui.Fabrication and Properties of Porous Si3 N4 Ceramic by Gel Casting Technique[J].Aerospace Materials & Technology,2011,41(2). |
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| Authors: | Zhang Jian Wang Hongjie Fan Jinpeng Feng Zhihai Chen Conghui |
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| Institution: | Zhang Jian1 Wang Hongjie2 Fan Jinpeng1 Feng Zhihai1 Chen Conghui1(1 National Key Laboratory of Advanced Functional Composite Materials,Aerospace Research Institute of Materials & Processing Technology,Beijing 100076) (2 State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an 710049) |
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| Abstract: | In order to meet the requirement for wave-transparent materials,the porous Si3N4 materials with high strength and low dielectric constant were fabricated by gel-casting method.The microstructure,dielectric properties,wave transmittance and flexural strength were investigated.The results show that the flexural strength of porous Si3N4 is up to 50 MPa with dielectric constant of 2.3 to 2.8.At the same time,the materials have steady high temperature dielectric properties and good wave-transparent properties. |
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| Keywords: | Porous Si3N4 radome Gel-casting High temperature dielectric property Wave-transparent materials |
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