Influence of Copper(II) Oxide Additions to Zinc Niobate Microwave Ceramics on Sintering Temperature and Dielectric Properties

Dong-Wan Kim, Kyung Hyun Ko, Kug Sun Hong

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

The effect of CuO additions on the firing temperature of ZnNb2O6 ceramics was investigated using dilatometry, transmission electron microscopy, and X-ray diffractometry. A 5 wt% CuO addition to ZnNb2O6 ceramics significantly lowered the firing temperature from 1150° to ∼900°C. The presence of a CuO-rich intergranular phase in the specimen was observed and was evidence of the formation of a liquid phase during sintering. The composition of the liquid phase was (ZnCu2)Nb2O8. In particular, the low-fired ZnNb2O6 ceramics had good microwave dielectric characteristics - Q × f = 59 500, εr = 22.1, τr = -66 ppm/°C. These properties were correlated with the formation of a second phase, (ZnCu2)Nb2O8.

Original languageEnglish
Pages (from-to)1286-1290
Number of pages5
JournalJournal of the American Ceramic Society
Volume84
Issue number6
Publication statusPublished - 2001 Jun 1
Externally publishedYes

Fingerprint

dielectric property
Copper oxides
ceramics
Dielectric properties
Zinc
Sintering
zinc
Microwaves
oxide
copper
Liquid phase sintering
X ray diffraction analysis
liquid
temperature
Transmission electron microscopy
Temperature
transmission electron microscopy
Liquids
Chemical analysis
sintering

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Influence of Copper(II) Oxide Additions to Zinc Niobate Microwave Ceramics on Sintering Temperature and Dielectric Properties. / Kim, Dong-Wan; Ko, Kyung Hyun; Hong, Kug Sun.

In: Journal of the American Ceramic Society, Vol. 84, No. 6, 01.06.2001, p. 1286-1290.

Research output: Contribution to journalArticle

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