Enhanced thermal conductivity in Si3N4 ceramic by addition of a small amount of carbon
文献类型：期刊论文
| 作者 | Li, Yinsheng; Kim, Ha-Neul; Wu, Haibo; Kim, Mi-Ju; Ko, Jae-Woong; Park, Young-Jo; Huang, Zhengren; Kim, Hai-Doo |
| 刊名 | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
 |
| 出版日期 | 2019 |
| 卷号 | 39期号:2019-02-03页码:157 |
| 关键词 | Silicon nitride Carbon Microstructure Thermal conductivity |
| ISSN号 | 0955-2219 |
| DOI | 10.1016/j.jeurceramsoc.2018.10.006 |
| 文献子类 | Article |
| 英文摘要 | In order to fabricate Si3N4 ceramic with enhanced thermal conductivity, 93 mol%alpha-Si3N4-2 mol%Yb2O3-5 mol% MgO powder mixture was doped with 5 mol% carbon, and sintered firstly at 1500 degrees C for 8 h and subsequently at 1900 degrees C for 12 h under 1 MPa nitrogen pressure. During the first-step sintering, the carbothermal reduction process significantly reduced the oxygen content and increased the N/O ratio of intergranular secondary phase, resulting in the precipitation of Yb2Si4O7N2 crystalline phase, higher beta-Si3N4 content and larger rod-liked beta-Si3N4 grains in the semi-finished Si3N4 sample. After the second-step sintering, the final dense Si3N4 product acquired coarser elongated grains, lower lattice oxygen content, tighter Si3N4-Si3N4 interfaces and more devitrified intergranular phase due to the further carbothermal reduction of oxynitride secondary phase. Consequently, the addition of carbon enabled Si3N4 ceramic to gain a significant increase of similar to 25.5% in thermal conductivity from 102 to 128 W.m(-1) K--(1). |
| WOS关键词 | BONDED SILICON-NITRIDE ; MECHANICAL-PROPERTIES ; BETA-SI3N4 CERAMICS ; SIALON CERAMICS ; OXYGEN-CONTENT ; BORON-CARBIDE ; SI POWDER ; MICROSTRUCTURE ; LATTICE ; CRYSTALLIZATION |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27556]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Li, Yinsheng,Kim, Ha-Neul,Wu, Haibo,et al. Enhanced thermal conductivity in Si3N4 ceramic by addition of a small amount of carbon[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2019,39(2019-02-03):157. |
| APA | Li, Yinsheng.,Kim, Ha-Neul.,Wu, Haibo.,Kim, Mi-Ju.,Ko, Jae-Woong.,...&Kim, Hai-Doo.(2019).Enhanced thermal conductivity in Si3N4 ceramic by addition of a small amount of carbon.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,39(2019-02-03),157. |
| MLA | Li, Yinsheng,et al."Enhanced thermal conductivity in Si3N4 ceramic by addition of a small amount of carbon".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 39.2019-02-03(2019):157. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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