Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures

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	Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures
	Wang SJ; Jia DC; Cui W; Yang ZH; Duan XM; Shao YF(邵颖峰); Zhou Y; Jia, DC (reprint author), Harbin Inst Technol, Inst Adv Ceram, Harbin 150001, Peoples R China.
发表期刊	JOURNAL OF MATERIALS SCIENCE
	2013-11
卷号	48 期号:22 页码:7974-7980
ISSN	0022-2461
摘要	By gel casting with polymethylmethacrylate microbeads (PMMA) as pore-forming agent, porous boron nitride/silicon nitride (BN/Si3N4) composite ceramics were successfully prepared. The obtained ceramic shows bimodal hierarchical structures that composed of spherical-shaped micro pores depending on PMMA content and irregular sub-micro pores formed by the stacking of ceramic particles. Porosity of the porous BN/Si3N4 ceramics can be well controlled from 53.0 to 60.6 % by the PMMA content from 10 to 40 wt%, as well as the mechanical and dielectric properties. Effect of PMMA content on phase composition and the relationship between microstructure and the basic properties of the porous BN/Si3N4 ceramics was discussed in detail. Microstructure analysis reveals that the sub-micro pores acted as channels between micro pores. BN particles have a relatively denser distribution on the wall of spherical-shaped micro pores with a window between micro and sub-micro pores, and resulting in a half-closed micro pore structure, which is meaningful for material design with concentration of BN particles on the wall of pore structure.
关键词	Porous Silicon-nitride Fibrous Monolithic Ceramics Mechanical-properties Dielectric-properties Composite Ceramics Beta-si3n4 Grains Forming Agent Performance Starch Size
学科领域	复合材料力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000323503900023
项目资助者	Yangtze Scholars Program in China; National Natural Science Foundation of China (NSFC) [51021002, 51225203]
课题组名称	LNM生物材料微结构和力学性能
论文分区	二类/Q1
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47452
专题	非线性力学国家重点实验室
通讯作者	Jia, DC (reprint author), Harbin Inst Technol, Inst Adv Ceram, Harbin 150001, Peoples R China.
推荐引用方式 GB/T 7714	Wang SJ,Jia DC,Cui W,et al. Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures[J]. JOURNAL OF MATERIALS SCIENCE,2013,48,22,:7974-7980.
APA	Wang SJ.,Jia DC.,Cui W.,Yang ZH.,Duan XM.,...&Jia, DC .(2013).Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures.JOURNAL OF MATERIALS SCIENCE,48(22),7974-7980.
MLA	Wang SJ,et al."Effect of starting PMMA content on microstructure and properties of gel casting BN/Si3N4 ceramics with spherical-shaped pore structures".JOURNAL OF MATERIALS SCIENCE 48.22(2013):7974-7980.

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