尖晶石固化磷酸铝基复合材料的制备与性能

doi:10.11896/cldb.18070226

材料导报

2019, Vol. 33

Issue (18): 3012-3015 https://doi.org/10.11896/cldb.18070226

无机非金属及其复合材料

尖晶石固化磷酸铝基复合材料的制备与性能

杨小波¹, 吕毅¹, 王华栋¹, 张冰清¹, 应国兵²

1 航天特种材料及工艺技术研究所,北京 100074
2 河海大学力学与材料学院,南京 211100

Preparation and Properties of Aluminum Phosphate Composite Cured by Spinel

YANG Xiaobo¹, LYU Yi¹, WANG Huadong¹, ZHANG Bingqing¹, YING Guobing²

1 Aerospace Institute of Advanced Materials & Processing Technology, Beijing 100074
2 College of Mechanics and Materials, Hohai University, Nanjing 211100

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摘要以石英纤维布为增强相、酸式磷酸铝水溶胶为基体相、镁铝尖晶石MgAl₂O₄粉体为固化助剂,运用模压工艺制备了磷酸铝基复合材料。采用XRD、SEM及力学试验机等分析测试手段,研究了磷酸铝溶胶流动性及尖晶石粉体的烧结过程,探讨了尖晶石粉体作为固化助剂对复合材料力学性能及介电性能的影响。结果表明:磷酸铝溶胶水含量(质量分数)达到50%,胶液粘度小于200 mPa·s;固相法制备的尖晶石粉体添加量(质量分数)达到18%且基体含量(质量分数)接近50%时,得到的磷酸铝复合材料的力学性能达到最佳,弯曲强度达到167 MPa,层间剪切强度达到14 MPa,压缩强度达到40 MPa;室温下复合材料的介电性能(介电常数ε=3.35、损耗角正切值tanδ=0.009)最好,但随着温度升高复合材料基体中磷酸铝发生相转变,引起介电参数逐步增大,推测低温石英型磷酸铝(B-AlPO₄)逐步转变为高温方石英型磷酸铝(C-AlPO₄)后材料的介电性能将得到改善。

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关键词: MgAl₂O₄尖晶石磷酸铝基复合材料力学性能介电性能

Abstract: Aluminum phosphate composites were prepared by compression processing technology, using quartz textile as reinforcing part, aluminum phosphate hydrosol as matrix and spinel MgAl₂O₄ as curing agent, respectively. The flowing power of the aluminum phosphate hydrosol was studied. The spinel MgAl₂O₄ powders, synthesized by solid state reaction, was identified by X-ray powders diffraction. Microstructures of the composites were observed by scanning electron microscope. And the influences of MgAl₂O₄ contents on the mechanical and dielectric properties of aluminum phosphate composites were investigated. It was found that the viscosity of aluminum phosphate hydrosol was less than 200 mPa·s when content of water arrived at 50wt%. While the content of spinel MgAl₂O₄ reached 18wt% with a matrix ratio of 50 wt%, the composite obtained the highest mechanical properties, which the flexural strength, compression strength and interlaminar shearing strength were 167 MPa, 14 MPa and 40 MPa, respectively. The dielectric constant and loss tangent of the composite at room temperature were 3.35 and 0.009, respectively. However, the dielectric parameters increased gradually when crystalline phase of aluminum phosphate was changed with increasing temperature. And the dielectric properties of composites would be improved while the crystalline phase of aluminum phosphate was changed from B-AlPO₄ into C-AlPO₄.

Key words: MgAl₂O₄ spinel aluminum phosphate composites mechanical properties dielectric properties

出版日期: 2019-09-25 发布日期: 2019-07-31

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通讯作者: yangxb_ht@163.com

作者简介: 杨小波,航天特种材料及工艺技术研究所,高级工程师。2005年7月毕业于哈尔滨工业大学,获得工学硕士学位。同年加入航天特种材料及工艺技术研究所工作至今,主要从事功能/结构陶瓷领域的研究,先后负责完成国家部委、科工集团等支持的多个课题项目研究,申报发明专利10余项。

引用本文:

杨小波, 吕毅, 王华栋, 张冰清, 应国兵. 尖晶石固化磷酸铝基复合材料的制备与性能[J]. 材料导报, 2019, 33(18): 3012-3015.
YANG Xiaobo, LYU Yi, WANG Huadong, ZHANG Bingqing, YING Guobing. Preparation and Properties of Aluminum Phosphate Composite Cured by Spinel. Materials Reports, 2019, 33(18): 3012-3015.

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http://www.mater-rep.com/CN/10.11896/cldb.18070226 或 http://www.mater-rep.com/CN/Y2019/V33/I18/3012

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