Variation of the viscosity of molten potassium niobate with annealing time
文献类型：期刊论文
| 作者 | Hong, XG ; Chen, YF |
| 刊名 | JOURNAL OF CRYSTAL GROWTH
 |
| 出版日期 | 1996 |
| 卷号 | 165期号:1-2页码:81 |
| 关键词 | PHYSICAL-PROPERTIES KNBO3 MELT |
| ISSN号 | 0022-0248 |
| 通讯作者 | Hong, XG (reprint author), CHINESE ACAD SCI,INST PHYS,POB 603,BEIJING 100080,PEOPLES R CHINA. |
| 中文摘要 | Using the double-wire torsion pendulum method, we have measured the viscosity of a potassium niobate molten system with excess K2O from 50 to 56 mol% at temperatures up to 1190 degrees C in air. Both the viscosity and its activation energy show strong time dependence. While the values for viscosity increase for melts with 50 and 51 mol% K2O, which are annealed at 1150 degrees C in air, the viscosity, however, of the melt with more than 2 mol% excess K2O shows a completely different time dependence, i.e. drastic decrease with annealing time. A similar striking reversed variation of temperature-dependent viscosity with annealing time is observed when the K2O content in the melt is up to 52 mol%. These anomalous variations in viscosity give clear evidence why the KNbO3 single crystal should be grown from mother melts with excess K2O above 51 mol%, and after being annealed for a long time. This result also confirms that the double-wire torsion pendulum method is a useful tool to study the time-dependent viscosity of melts at high temperature in air. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46506]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Hong, XG,Chen, YF. Variation of the viscosity of molten potassium niobate with annealing time[J]. JOURNAL OF CRYSTAL GROWTH,1996,165(1-2):81. |
| APA | Hong, XG,&Chen, YF.(1996).Variation of the viscosity of molten potassium niobate with annealing time.JOURNAL OF CRYSTAL GROWTH,165(1-2),81. |
| MLA | Hong, XG,et al."Variation of the viscosity of molten potassium niobate with annealing time".JOURNAL OF CRYSTAL GROWTH 165.1-2(1996):81. |
入库方式： OAI收割
来源：物理研究所
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