The core-shell structure in ultrafine X7R dielectric ceramics

Xian Liu, Shangcong Cheng, Clive A. Randall

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Based on a hydrothermal barium titanate powder, temperature stable dielectrics which meet the X7R specification were developed for the use of Multilayer Capacitors (MLCs). By establishing a chemical inhomogeneity within individual grains the ferroelectric to paraelectric transition peak is diffused and the material has a unique core-shell microstructure with a pure or lightly doped ferroelectric core and a highly doped paraelectric shell. As dielectric layers in MLCs decrease in size so does the grain size. This study investigates the sintering mechanism and core-shell structure in submicron grains.

Original languageEnglish (US)
Pages (from-to)S312-S315
JournalJournal of the Korean Physical Society
Volume32
Issue numberSUPPL. 1
StatePublished - Feb 1 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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