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| 稀土氧化物在Al2O3透明陶瓷晶界浓度分布的非平衡态热力学分析 | |
| 引用本文： | 苏春辉,端木庆铎,王艳,肖璇,隋智通.稀土氧化物在Al2O3透明陶瓷晶界浓度分布的非平衡态热力学分析[J].硅酸盐学报,1998,26(6):802-807. |
| 作者姓名： | 苏春辉 端木庆铎 王艳 肖璇 隋智通 |
| 作者单位： | 1. 长春光学精密机械学院材料系 2. 辽宁省分析测试中心 3. 东北大学有色金属冶金系 |
| 基金项目： | 中国科学院资助项目，59474015， |
| 摘 要： | 采用高纯Ａｌ２Ｏ３超细粉末，烧制成掺杂稀土氧化物的Ａｌ２Ｏ３透明陶瓷。以ＥＰＭＡ法观测透明陶瓷晶界处的化学组成及稀土氧化物的定态浓度分布，用非平衡态热力不理论分析晶界偏析行为，研究发现，添加物在Ａｌ２Ｏ３透明陶瓷晶界的浓度分布为非平衡态和学组成分布，ＭｇＯ，Ｌａ２Ｏ３，Ｙ２Ｏ３富集于晶界，符合定态耦合模型。 |
| 关 键 词： | 透明陶瓷 稀土氧化物 晶界 热力学 氧化铝陶瓷 |
NON_EQUILIBRIUM THERMODYNAMIC ANALYSIS OF THE CONCENTRATION DISTRIBUTION OF RARE EARTH OXIDE AT ALUMINA TRANSPARENT CERAMIC CRYSTAL BOUNDARY |
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| Su Chunhui,Duanmu Qingduo,Wang Yan,Xiao Xuan,Sui Zhitong.NON_EQUILIBRIUM THERMODYNAMIC ANALYSIS OF THE CONCENTRATION DISTRIBUTION OF RARE EARTH OXIDE AT ALUMINA TRANSPARENT CERAMIC CRYSTAL BOUNDARY[J].Journal of The Chinese Ceramic Society,1998,26(6):802-807. | |
| Authors: | Su Chunhui Duanmu Qingduo Wang Yan Xiao Xuan Sui Zhitong |
| Abstract: | Alumina transparent ceramics doped with rare earth oxide were prepared using high purity Al 2O 3 ultrafine powder. The chemical composition at the crystal boundary of transparent ceramics was observed and the concentration distribution of rare earth oxide in stable state was measured by electron microprobe analysis. Solute partial separation behaviour at crystal boundary was analysed using non_equilibrium thermodynamic theory. Based on the study, the concentration distribution of the additive at the crystal boundary of alumina transparent ceramics is the non_equilibrium thermodynamic behaviour. MgO, La 2O 3 and Y 2O 3 are mainly concentrated at the crystal boundary and are in accordance with the coupling model in the stable state. |
| Keywords: | transparent ceramic rare earth oxide crystal boundary concentration distribution non_equilibrium thermodynamics |
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