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Effects of Antimony Oxide on the Characteristics of ZnO Varistors
Author(s) -
TAKEMURA TAKETOSHI,
KOBAYASHI MASAHIRO,
TAKADA YOSHIO,
SATO KEN
Publication year - 1987
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1987.tb04974.x
Subject(s) - varistor , spinel , antimony , materials science , sintering , antimony oxide , oxide , lattice (music) , chemical engineering , metallurgy , mineralogy , voltage , chemistry , electrical engineering , physics , acoustics , engineering
The breakdown voltage, the upturn voltage, and the nonlinearity of the ZnO varistors are significantly influenced by the Sb 2 O 3 and SiO 2 contents, as well as by the β→γ transition of the Bi 2 O 3 phase. The lattice parameter of spinel is influenced by the coexisting Bi 2 O 3 phase. Antimony oxide disperses into the powders of ZnO and other additives in the early stage of sintering, and finally gathers again as particles of spinel which may play an important role in the improvement of the nonlinearity by stressing the interfaces of two ZnO grains.