采用粉末熔化工艺(PMP)制备YBa2Cu3O7-x先驱粉末.研究了在加热过程中加热速率和保温时间对其相成分的影响,并对粉末的显微结构进行了分析.通过高温X射线衍射仪原位研究了400°C/h和6000°C/h的加热速率对先驱粉末加热到包晶分解温度过程中的相变化过程.结果表明:加热速率为400°C/h时,先驱粉末会形成YBa2Cu3O7-x相;加熟速率为6000°C/h时,则不会有YBa2Cu3O7-x相生成.通过研究不同保温时间对粉末熔化工艺先驱粉末的影响,得出YBa2Cu3O7-x相的形成区间,其结果有助于控制粉末熔化工艺的参数和理解工艺的本质.
参考文献
[1] | Chu C W et al.[J].Physical Review Letters,1987,58:405. |
[2] | 赵忠贤.[J].科学通报,1987(06):412. |
[3] | Larbalestier D C et al.[J].Physcia C,1988,153-155:1580. |
[4] | Jin S et al.[J].Physical Review B,1988,37:7850. |
[5] | Salama K et al.[J].Applied Physics Letters,1989,54:2352. |
[6] | Murakami M et al.[J].Journal of Applied Physics,1989,28:1189. |
[7] | Murakami M et al.[J].Cryogenics,1990,30:390. |
[8] | Lian Z et al.[J].Superconductor Science and Technology,1990,3:490. |
[9] | Chan-Joong Kim;Ki-Baik Kim;Young A. Jee .Effects of the heating rate on conversion of the precursor powders used for melt processes into YBa_2Cu_3O_7-y[J].Journal of Materials Research,1999(4):1212-1220. |
[10] | Chow J C L et al.[J].Superconductor Science and Technology,1997,10:435. |
[11] | Chung F H .[J].Journal of Applied Crystallography,1974,7:519. |
[12] | Winnie Wong Ng et al.[J].Journal of the American Ceramic Society,1994,77:1884. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%