Effect of Diatomite Additive on the Meehanieal and Dieleetrie Properties of Porous SiO2-Si3N4 Composite Ceramics
Porous SiO2-Si3N4 composite ceramics with high porosity and excellent mechanical properties were fabricated by pressureless-sintering at relatively low temperature of 1 500 ~C using diatomite as pore forming agent. The effects of diatomite on flexural strength, fracture toughness, shrinkage, porosit...
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| Veröffentlicht in: | 武汉理工大学学报：材料科学英文版 2016 (3), p.528-532 |
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| container_title | 武汉理工大学学报：材料科学英文版 |
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| creator | YOU Guanglei BI Jianqiang CHEN Yafei YIN Chonglong WANG Chang＇an |
| description | Porous SiO2-Si3N4 composite ceramics with high porosity and excellent mechanical properties were fabricated by pressureless-sintering at relatively low temperature of 1 500 ~C using diatomite as pore forming agent. The effects of diatomite on flexural strength, fracture toughness, shrinkage, porosity and phase transformation of the porous ceramics were investigated in detail. Compared with that of the ceramic without adding diatomite, the porosity of the ceramic with 10% diatomite is increased by about 27.4%, the flexural strength and fracture toughness reaches 78.04 MPa and 1.25 MPa.m1/2, respectively. As the porosity increases, the dielectric constant of porous SiO2-Si3N4 ceramic decreases obviously from 3.65 to 2.95. |
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The effects of diatomite on flexural strength, fracture toughness, shrinkage, porosity and phase transformation of the porous ceramics were investigated in detail. Compared with that of the ceramic without adding diatomite, the porosity of the ceramic with 10% diatomite is increased by about 27.4%, the flexural strength and fracture toughness reaches 78.04 MPa and 1.25 MPa.m1/2, respectively. 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Materials Science Edition</addtitle><date>2016</date><risdate>2016</risdate><issue>3</issue><spage>528</spage><epage>532</epage><pages>528-532</pages><issn>1000-2413</issn><eissn>1993-0437</eissn><abstract>Porous SiO2-Si3N4 composite ceramics with high porosity and excellent mechanical properties were fabricated by pressureless-sintering at relatively low temperature of 1 500 ~C using diatomite as pore forming agent. The effects of diatomite on flexural strength, fracture toughness, shrinkage, porosity and phase transformation of the porous ceramics were investigated in detail. Compared with that of the ceramic without adding diatomite, the porosity of the ceramic with 10% diatomite is increased by about 27.4%, the flexural strength and fracture toughness reaches 78.04 MPa and 1.25 MPa.m1/2, respectively. As the porosity increases, the dielectric constant of porous SiO2-Si3N4 ceramic decreases obviously from 3.65 to 2.95.</abstract></addata></record> |
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| ispartof | 武汉理工大学学报：材料科学英文版, 2016 (3), p.528-532 |
| issn | 1000-2413 1993-0437 |
| language | eng |
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| source | SpringerLink Journals; Alma/SFX Local Collection |
| subjects | Si3N4陶瓷 力学 复合材料性能 多孔陶瓷 孔隙率 断裂韧性 添加剂 硅藻土 |
| title | Effect of Diatomite Additive on the Meehanieal and Dieleetrie Properties of Porous SiO2-Si3N4 Composite Ceramics |
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