尖晶石固化磷酸铝基复合材料的制备与性能

doi:10.11896/cldb.18070226

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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

Published: 31 July 2019

CLC number:

TB34

About author:: Xiaobo Yang received his M.S. degree in engineering from Harbin Institute of Technology in July 2005. He is currently a senior engineer in Aerospace Institute of Advanced Materials & Processing Technology and mainly engages in material research in functional/structural ceramics.

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	YANG Xiaobo
	LYU Yi
	WANG Huadong
	ZHANG Bingqing
	YING Guobing

Cite this article:

YANG Xiaobo,LYU Yi,WANG Huadong, et al. Preparation and Properties of Aluminum Phosphate Composite Cured by Spinel[J]. Materials Reports, 2019, 33(18): 3012-3015.

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

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