| 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.
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| Source Publication | JOURNAL OF MATERIALS SCIENCE
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| 2013-11 | |
| Volume | 48Issue:22Pages:7974-7980 |
| ISSN | 0022-2461 |
| Abstract | 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. |
| Keyword | Porous Silicon-nitride Fibrous Monolithic Ceramics Mechanical-properties Dielectric-properties Composite Ceramics Beta-si3n4 Grains Forming Agent Performance Starch Size |
| Subject Area | 复合材料力学 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000323503900023 |
| Funding Organization | Yangtze Scholars Program in China; National Natural Science Foundation of China (NSFC) [51021002, 51225203] |
| Department | LNM生物材料微结构和力学性能 |
| Classification | 二类/Q1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/47452 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Jia, DC (reprint author), Harbin Inst Technol, Inst Adv Ceram, Harbin 150001, Peoples R China. |
| Recommended Citation 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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