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Formation and Properties of Barium Metaplumbate
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1965
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Materials ScienceChemical EngineeringEngineeringCeramicsFunctional CeramicBarium MetaplumbateCeramics MaterialsCeramic SynthesisMetamorphismO 4Sintered CeramicCeramic PowdersElectrical PropertiesPetrologyCeramic TechnologyBapbo 3Metamorphic Process
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.