期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 36, 期 3, 页码 609-614出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.09.035
关键词
BN; ZnO-based MLVs; Reduction-reoxidation method; BME
资金
- National High Technology Research and Development Program of China (863 Program) [2013AA030903]
- National Natural Science Foundation of China [61571203/F012207]
A reduction-reoxidation method is frequently used for preparing multilayer ceramic components with base metal inner electrodes (BME). However, ZnO varistors has been hardly prepared by the reduction-reoxidation method because that ZnO is easy to be reduced. We proposed that Boron nitride (BN) as an anti-reduction additive in this paper, which obviously prevented ZnO-Bi2O3 from reducing when sintering in a reducing atmosphere. For the BN-added samples, the B-containing phase formed during the sintering process promoted the liquid-phase sintering process of ZnO and prevented the composition loss of them. BN-added samples sintered in a reducing atmosphere (N-2(99.5%)-H-2(0.5%)) at 1000 degrees C for 2 h and re-oxidized in air at 850 degrees C for 2 h exhibited excellent nonlinear properties with nonlinear coefficient of 43.3 and leakage current of 0.12 mu A/cm(2). This is promising for producing BME ZnO-based multilayer varistors (MLVs). (C) 2015 Elsevier Ltd. All rights reserved.
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