Densification and anisotropic grain growth in Sr2Nb2O7 |
| |
| Authors: | B Brahmaroutu G L Messing S Trolier-McKinstry |
| |
| Affiliation: | (1) Materials Research Laboratory and Department of Materials Science & Engineering, The Pennsylvania State University, University Park, PA 16802, USA;(2) Materials Research Laboratory and Department of Materials Science & Engineering, The Pennsylvania State University, University Park, PA 16802, USA |
| |
| Abstract: | Sr : Nb stoichiometry and donor-doping with La were found to affect densification behavior and anisotropic grain growth in Sr2Nb2O7 ceramics. La-doping improved the high temperature a.c. resistivity, but inhibits grain growth by grain boundary pinning. The presence of excess Nb was found to promote anisotropic grain growth by forming a liquid at the grain boundaries in both undoped and doped Sr2Nb2O7. Anisotropic grain growth in La-doped Sr2Nb2O7 can be controlled by incorporating large template particles in a Nb-rich matrix. High sintered densities ( 98% of theoretical) were achieved in both undoped and La-doped samples. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
