Effect of crystallinity on proton conductivity in yttrium-doped barium zirconate thin films |
| |
| Authors: | Young Beom Kim Turgut M GürHee-Joon Jung Sangkyun KangRobert Sinclair Fritz B Prinz |
| |
| Institution: | a Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USAb Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USAc Samsung Advanced Institute of Technology, Samsung Electronics, Giheung, Gyeonggi-do, Korea |
| |
| Abstract: | The effect of crystallinity on proton conductivity in amorphous, single crystal and polycrystal yttrium-doped barium zirconate (BYZ) thin films grown 120 nm in thickness on amorphous (quartz) and single crystal MgO(100) substrates has been studied. The conductivity was measured in the temperature range of 150 ~ 350 °C. By altering the film deposition temperature, varying degrees of crystallization and microstructure were observed by x-ray diffraction and transmission electron microscopy. The epitaxial BYZ film grown on MgO(100) substrate at 900 °C showed the highest proton conductivity among other samples with an activation energy of 0.45 eV, whereas polycrystalline and amorphous BYZ films showed lower conductivities due to grain boundaries in their granular microstructure. |
| |
| Keywords: | Y-doped barium zirconate Epitaxial growth Ionic conductivity Proton conducting ceramic electrolyte |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
