Dielectric properties of lead-magnesium niobate ceramics

Journal Article · Tue May 01 00:00:00 EDT 1984 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1984.tb19528.x· OSTI ID:5077619

Swartz, S L; Shrout,

Dielectric properties are reported for lead magnesium niobate (PbMg /sub 1/3/ Nb /sub 2/3/ O/sub 3/) ceramics which were prepared as single phase (i.e., without pyrochlore) with an improved technique. Dielectric constants of 18,000 for pure PMN and 31,000 for PMN with 10% PbTiO/sub 3/ were achieved; these values are 50% larger than those reported in the literature. The dielectric constant of PMN ceramics was found to increase with both sintering temperature and excess MgO, and subsequent analysis of the microstructures confirmed that this was due to an increase in grain size. This grain-size dependence is explained as a consequence of low-permittivity grain boundaries.

• Research Organization: Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania
• OSTI ID: 5077619
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 67:5; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
360603* -- Materials-- Properties
ALKALINE EARTH METAL COMPOUNDS
CERAMICS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CRYSTAL STRUCTURE
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
FABRICATION
GRAIN BOUNDARIES
GRAIN SIZE
LEAD COMPOUNDS
MAGNESIUM COMPOUNDS
MICROSTRUCTURE
NIOBATES
NIOBIUM COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SINTERING
SIZE
SYNTHESIS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS