MicrostructureandElectricalPropertiesofEr2O3-DopedZnO-BasedVaristorCeramicsPreparedbyHigh-EnergyBallMilling

被引：0

作者：

刘宏玉 ^{[1
]}

孔慧 ^{[2
]}

蒋冬梅 ^{[3
]}

石旺舟 ^{[3
]}

马学鸣 ^{[3
]}

机构：

[1] College of Science, Wuhan University of Science and Technology,Wuhan , China

[2] Shanghai AJ Nano-Science Development Co, Ltd,Shanghai , China

[3] Department of Physics, East China Normal University,Shanghai , China

来源：

Journal of Rare Earths | 2007年 / 01期

关键词：

varistor; Er2O3; microstructure; electrical property; high-energy ball milling; low-temperature sintering; rare earths;

D O I：

暂无

中图分类号：

TG580.6 [磨削加工工艺];

学科分类号：

080201 ; 080503 ;

摘要：

The microstructure, electrical properties and density of ZnO-based varistor ceramics with different Er2O3 content prepared by high-energy ball milling (HEBM) and sintered at 800 ℃ were investigated. With increasing Er2O3 content, the ZnO grain size decreases due to the Er-rich phases inhibiting grain growth; and nonlinear coefficient (α) decreases because of the decrease of barrier height (φB). The breakdown voltage (Eb) and density increase, whereas leakage current (IL) decreases with increasing Er2O3 content. The barrier height (φB), donor concentration (Nd), density of interface states (Ns) decrease and barrier width (ω) increases with increasing Er2O3 content due to acceptor effect of Er2O3 in varistor ceramics.

引用

页码：120 / 123

页数：4

共 3 条

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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2004, 15 (01) :29-36

[2]

Microstructure, electrical properties, and degradation behavior of praseodymium oxides-based zinc oxide varistors doped with Y2O3[J] . Choon-Woo Nahm,Choon-Hyun Park.Journal of Materials Science . 2000 (12)

[3]

Effect of Bi 2 O 3 addition on the microstructure and electrical properties of the SnO 2 .CoO.Nb 2 O 5 varistor system[J] . S. A. PIANARO,P. R. BUENO,P. OLIVI,E. LONGO,J. A. VARELA.Journal of Materials Science Letters . 1997 (8)

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