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Temperature/Composition Phase Diagram of the System Bi 2 O 3 ‐PbO
Author(s) -
BIEFELD R. M.,
WHITE S. S.
Publication year - 1981
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.1151-2916.1981.tb10253.x
Subject(s) - eutectic system , phase diagram , powder diffraction , diffraction , solubility , materials science , differential thermal analysis , phase (matter) , sintering , solid solution , analytical chemistry (journal) , bismuth , mineralogy , crystallography , chemistry , microstructure , optics , metallurgy , chromatography , organic chemistry , physics
The Bi 2 O 3 ‐PbO phase diagram was determined using differential thermal analysis and both room‐ and high‐temperature X‐ray powder diffraction. The phase diagram contains a single eutectic at 73 mol% PbO and 635°C. A body‐centered cubic solid solution exists above ∼600°C within a composition range of 30 to 65 mol% PbO. The compounds α‐Bi 2 O 3 , σ5‐Bi 2 O 3 , and γ‐PbO (litharge) have wide solubility ranges. Four compounds, 6Bi 2 O 3 ·PbO, 3Bi 2 O 3 ·2PbO, 4Bi 2 O 3 ,5PbO, and Bi 2 O 3 ·3PbO, are formed in this system and the previously unreported X‐ray diffraction patterns of the latter three compounds are reported. Diffraction patterns for some of these mixed oxides have been observed in ZnO‐based varistors grown using Bi 2 O 3 and PbO as sintering aids.