Crystal Symmetry of BaTiO3 Grains in X7R Multilayer Ceramic Capacitors
作者： Hwan-Wen Lee , Mike S. H. Chu , Hong-Yang Lu
DOI: 10.1111/J.1551-2916.2010.04232.X
关键词:
摘要: Convergent beam electron diffraction combined with conventional transmission microscopy is used to determine the crystal symmetry, and energy-dispersive spectrometry (EDS) microchemistry of BaTiO 3 grains in (CaO+MgO)-codoped, EIA-X7R multilayer ceramic capacitors (MLCCs). The point group symmetries core-shell grain shell MLCCs are analyzed following procedures reported by Buxton colleagues. It found that symmetry core region from type-I type-II tetragonal (T) 4mm rhombohedral (R) 3m, respectively, cubic (C) m3m. dependence C-, T-, R-phases on oxygen vacancy concentration generated acceptor dopants, sintered low partial pressure (pO 2 ), discussed.
sci-hub.se 参考文章(27)
Yuval Avniel, Joseph D. Nance, Hyun D. Park, Mike S. H. Chu, Multilayer ceramic chip capacitor wiht high reliability compatible with nickel electrodes ,(2000)
Detlev Hennings, Barium titanate based ceramic materials for dielectric use International Journal of High Technology Ceramics. ,vol. 3, pp. 91- 111 ,(1987) , 10.1016/0267-3762(87)90031-2
Daniel E. McCauley, Mike S. H. Chu, Mohammed H. Megherhi, PO2 Dependence of the Diffuse-Phase Transition in Base Metal Capacitor Dielectrics Journal of the American Ceramic Society. ,vol. 89, pp. 193- 201 ,(2006) , 10.1111/J.1551-2916.2005.00661.X
Ulrich Weber, Georg Greuel, Ulrich Boettger, Sophie Weber, Detlev Hennings, Rainer Waser, Dielectric properties of Ba(Zr, Ti)O3-based ferroelectrics for capacitor applications Journal of the American Ceramic Society. ,vol. 84, pp. 759- 766 ,(2001) , 10.1111/J.1151-2916.2001.TB00738.X
Shin-Tae Bae, Sangwook Lee, Jin Ho Kim, Kug Sun Hong, Hyunho Shin, Hyun Suk Jung, Effect of Glass Composition on the Dielectric Properties of a Liquid‐Phase‐Sintered MgO‐Doped BaTiO3 Journal of the American Ceramic Society. ,vol. 91, pp. 2205- 2210 ,(2008) , 10.1111/J.1551-2916.2008.02435.X
Qiquan Feng, Caspar J. McConville, Weak‐Beam Dark‐Field Microscopy of Complex Stress States in X7R‐Type BaTiO3 Dielectric Core–Shell Structures Journal of the American Ceramic Society. ,vol. 87, pp. 1945- 1951 ,(2005) , 10.1111/J.1151-2916.2004.TB06345.X
M. Tanaka, R. Saito, H. Sekii, Point-group determination by convergent-beam electron diffraction Acta Crystallographica Section A. ,vol. 39, pp. 357- 368 ,(1983) , 10.1107/S010876738300080X
G. Smolensky, Ferroelectrics with diffuse phase transition Ferroelectrics. ,vol. 53, pp. 129- 135 ,(1984) , 10.1080/00150198408245041
Yu-Chuan Wu, Hong-Yang Lu, Daniel E. McCauley, Mike S.H. Chu, The {111}-modulated domains in tetragonal BaTiO3 Journal of the American Ceramic Society. ,vol. 89, pp. 2702- 2709 ,(2006) , 10.1111/J.1551-2916.2006.01124.X
D. HENNINGS, A. SCHNELL, G. SIMON, Diffuse Ferroelectric Phase Transitions in Ba(Ti1-yZry)O3 Ceramics Journal of the American Ceramic Society. ,vol. 65, pp. 539- 544 ,(1982) , 10.1111/J.1151-2916.1982.TB10778.X