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Formation and Properties of Barium Metaplumbate
Author(s) -
NITTA TSUNEHARU,
NAGASE KANEOMI,
HAYAKAWA SHIGERU,
IIDA YOSHIO
Publication year - 1965
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.1151-2916.1965.tb14696.x
Subject(s) - stoichiometry , barium , ceramic , materials science , molar ratio , oxygen , mineralogy , electrical resistivity and conductivity , chemical composition , analytical chemistry (journal) , temperature coefficient , chemistry , metallurgy , composite material , organic chemistry , catalysis , engineering , electrical engineering
The preparation and the physical and electrical properties of BaPbO 3 ceramics are described. The compound was formed by firing an equimolar mixture of BaCO 3 and Pb 3 O 4 in oxygen at 880°C. To produce the stoichiometric compound on firing in air at 980°C it was necessary to use an excess of PbO (molar ratio, Pb/Ba = 1.278). A well sintered ceramic was obtained only with a stoichiometric composition with a sintered density of 7.78. Free BaCO 3 was found in the fired bodies including the PbO‐rich compositions. The electrical resistively of BaPbO 3 was 8.3 × 10 −4 ohm‐cm at 25°C with a temperature coefficient of +0.15%/°C.