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Rapid Sintering of Stoichiometric Zinc‐Modified Lead Magnesium Niobate
Author(s) -
Landin Steven M.,
Schulze Walter A.
Publication year - 1990
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.1151-2916.1990.tb05135.x
Subject(s) - materials science , sintering , pyrochlore , dielectric , magnesium , volatilisation , stoichiometry , mineralogy , zinc , lead oxide , permittivity , ceramic , grain size , analytical chemistry (journal) , atmospheric temperature range , metallurgy , chemistry , thermodynamics , physics , optoelectronics , organic chemistry , chromatography , phase (matter)
A rapid thermal‐processing technique was used to densify zinc‐modified lead magnesium niobate (PMZN30) of the form Pb(Mg 0.7 Zn 0.3 ) 1/3 Nb 2/3 O 3 . This dielectric composition showed relaxor behavior with a maximum permittivity near room temperature. Rapid densification was observed at temperature. Rapid densification was observed at temperatures of 1100°C and above, whereas lower temperatures showed a significant reduction of densification and electrical properties. A sintering schedule of 4 min at 1100°C with no prevention of PbO volatilization resulted in densification on the order of 90% of theoretical density and a weak field dielectric constant in excess of 14 000. Perovskite grain size was consistently in the range of 1 μm or less. The formation of pyrochlore on sample surfaces showed a direct relation to time and temperature.