Effect of Specific Surface Area on Growth and Porosity of Oxide Superconducting Ceramic YBCO Single Domain

摘要：

　　The effect of specific surface area on the growth and the porosity of oxide ceramic superconductor YBCO single domain are investigated.The enhancement of growth depth depends on the large specific surface area σ.When the specific surface area σ is more than the critical value 200mm2/g,the YBCO single domain is full-growth in the sample of size Φ20mm×l8mm.It reveals that a large specific surface area providing an effective tunnel of oxygen diffusion for the crystal growth.On the other hand,this tunnel makes oxygen gas emitting out resulting in porosity diameter decreased.The mean porosity diameter is observed as 5μm in hole sample smaller than 80μm in plain sample.The porosity distribution is calculated as 1/(100μm)2 in plain sample and 8/(10μm)2 in hole sample.

关键词： Superconductor YBCO Specific surface area Growth Porosity

作者: C P Zhang X Chaud H T Cao E Beaugnon L Zhou

作者单位: State Key Laboratory of Solidification Processing, Northwest Polytechnical University,Xian, 710072 CRETA/CNRS, BP166, Grenoble Cedex 9, 38042 France State Key Laboratory of Solidification Processing, Northwest Polytechnical University,Xian, 710072 CRETA/CNRS, BP166, Grenoble Cedex 9, 38042 France; Physical Material Dept., Universite Joseph Fourie State Key Laboratory of Solidification Processing, Northwest Polytechnical University,Xian, 710072

会议类型: 国际会议

会议名称: The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))

会议地点: 哈尔滨

会议语种:英文

页码: 346-349

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）