Effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of the BaTi4O9 ceramics

Jong Bong Lim, Sahn Nahm, Hyo Tae Kim, Jong Hee Kim, Jong Hoo Paik, Hwack Joo Lee

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of BaTi4O9 ceramics was investigated. The BaTi4O9 ceramics were able to be sintered at 975°C when B2O3 was added. This decrease in the sintering temperature of the BaTi4O9 ceramics upon the addition of B2O3 is attributed to the formation of BaB2O4 second phase whose melting temperature is around 900°C. The B2O3 added BaTi 4O9 ceramics alone were not sintered below 975°C, but were sintered at 875°C when CuO was added. The formation of BaCu(B 2O5) second phase could be responsible for the decrease in the sintering temperature of the CuO and B2O3 added BaTi4O9 ceramics. The BaTi4O9 ceramics containing 2.0 mol% B2O3 and 5.0 mol% CuO sintered at 900°C for 2 h have good microwave dielectric properties of εr = 36.3, Q× f = 30,500 GHz and τf = 28.1 ppm/°C.

Original languageEnglish
Pages (from-to)393-397
Number of pages5
JournalJournal of Electroceramics
Volume17
Issue number2-4
DOIs
Publication statusPublished - 2006 Dec

Keywords

  • BaCu(BO)
  • BaTiO
  • Dielectric properties
  • Electronic materials
  • Microstructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effect of B<sub>2</sub>O<sub>3</sub> and CuO on the sintering temperature and microwave dielectric properties of the BaTi<sub>4</sub>O<sub>9</sub> ceramics'. Together they form a unique fingerprint.

  • Cite this