EFFECT OF SOLID-SOLUTION ADDITIVES ON THE SINTERING OF ULTRA-FINE CEO2 POWDERS
文献类型：期刊论文
| 作者 | M. N. Rahaman ; Y. C. Zhou |
| 刊名 | Journal of the European Ceramic Society
 |
| 出版日期 | 1995 |
| 卷号 | 15期号:10页码:939-950 |
| 关键词 | grain-boundary phenomena nanocrystalline materials plausible concepts sufficient tio2 |
| ISSN号 | 0955-2219 |
| 中文摘要 | Ultra-fine CeO2 powders (particle size approximate to 10-15 nm) containing up to 20 at% of various divalent and trivalent cations (Mg2+, Ca2+, SC3+, Y3+ and Nd3+) were prepared by chemical precipitation under hydrothermal conditions. The effects of the cation concentration size and valency on the densification and grain growth of the compacted powders were examined during sintering at a constant heating rate of 10 degrees C/min. Compared to undoped CeO2, all of the additive cations caused a shift in the densification curve to higher temperatures. However, the density and grain size achieved after sintering depended significantly on the elemental composition of the additive. When the radii of the additive cations were larger than that of the host Ce4+ cation, (i.e. Ca2+, Y3+ and Nd-3), nearly full density and ultrafine grain size were achieved. Under identical sintering conditions lower density (approximate to 93-95% of the theoretical) and larger grain size were achieved when the radii of the additive cations were smaller than that of the host, (i.e. Mg2+ and SC3+). Powders doped simultaneously with two cations, (e.g. Ca2+ and Mg2+) showed sintering and grain growth characteristics which were intermediate between those for the powders doped with single cations at the equivalent concentration. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/38652]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | M. N. Rahaman,Y. C. Zhou. EFFECT OF SOLID-SOLUTION ADDITIVES ON THE SINTERING OF ULTRA-FINE CEO2 POWDERS[J]. Journal of the European Ceramic Society,1995,15(10):939-950. |
| APA | M. N. Rahaman,&Y. C. Zhou.(1995).EFFECT OF SOLID-SOLUTION ADDITIVES ON THE SINTERING OF ULTRA-FINE CEO2 POWDERS.Journal of the European Ceramic Society,15(10),939-950. |
| MLA | M. N. Rahaman,et al."EFFECT OF SOLID-SOLUTION ADDITIVES ON THE SINTERING OF ULTRA-FINE CEO2 POWDERS".Journal of the European Ceramic Society 15.10(1995):939-950. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。