EXCESS-MAGNESIA EFFECT ON PB(MG1/2W1/2)O-3-PBTIO3 DIELECTRICS AND THE AGING PHENOMENON

被引：5
作者：
UCHIKOBA, F
OKA, H
TACHIMOTO, K
ITO, T
KOBAYASHI, M
机构：
[1] Materials Research Center, TDK Corporation, Narita, Chiba, 286
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1994年 / 33卷 / 11期
关键词：
DIELECTRICS; CAPACITOR; LEAD MAGNESIUM TUNGSTATE; LEAD TITANATE; RELAXER; AGING; LEAD-COMPLEX PEROVSKITE; MAGNESIA;
D O I：
10.1143/JJAP.33.6220
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effects of 0 to 10 mol% excess-MgO addition on Pb(Mg1/2W1/2)O-3-PbTiO3 (PMW-PT) solid solutions were discussed. Excess-MgO addition successively changed the ferroelectric properties of PMW-PT. The material showed relaxer-type behavior with excess-MgO addition, whereas stoichiometric composition showed normal-ferroelectric-like properties, and further addition of 10 mol% caused dual peaks in the temperature dependence of the dielectric constant. These dual peaks were found to be attributed to aging phenomena. The excess MgO improved the degree of B-site ordering and local electric field based on defects, and it was suggested that the B-site ordering and the local field were responsible for the relaxer property and the aging effect, respectively.
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页码：6220 / 6226
页数：7
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