Structure and microwave dielectric properties of (Zn1-xNix)TiO3 ceramics

Hyo Tae Kim, Joon Cheol Hwang, Joong Hee Nam, Byung Hyun Choi, Michael T. Lanagan

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Dielectric ceramics in the system (Zn1-xNix)TiO3, x = 0 to 1 were synthesized by the solid-state reaction route. The phase distribution, microstructure, and dielectric properties were characterized using powder x-ray diffraction analysis, electron microscopy, and microwave measurement techniques. Three phase composition regions were identified in the specimens sintered at 1150 °C: [spinel + rutile] at 0 ≤ x ≤ 0.5, [spinel + ilmenite + rutile] at 0.5 < x ≤ 0.8, and [ilmenite] phase at 0.8 < x ≤ 1. For the 0 ≤ x ≤ 0.5 region, the amount of Ti-rich precipitates incorporated into the spinel phase decreased with the Ni content at 0 ≤ x ≤ 0.5, with a concomitant increase of the rutile phase. The microwave dielectric properties depended on the phase composition and volume according to the three typical phase regions, where the relative amount of rutile to the spinel or ilmenite determined the dielectric properties. The dielectric constant as a function of Ni addition was modeled with a Maxwell mixing rule. An optimum phase distribution was determined in this system with dielectric constant of 22, a Q × f of 60,000, and a low temperature coefficient of the resonant frequency.

Original languageEnglish (US)
Pages (from-to)1067-1072
Number of pages6
JournalJournal of Materials Research
Volume18
Issue number5
DOIs
StatePublished - Jan 1 2003

Fingerprint

Ilmenite
rutile
Dielectric properties
spinel
ilmenite
dielectric properties
Microwaves
ceramics
Phase composition
microwaves
Permittivity
Microwave measurement
permittivity
Solid state reactions
Electron microscopy
distribution (property)
Precipitates
Natural frequencies
Diffraction
Powders

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kim, Hyo Tae ; Hwang, Joon Cheol ; Nam, Joong Hee ; Choi, Byung Hyun ; Lanagan, Michael T. / Structure and microwave dielectric properties of (Zn1-xNix)TiO3 ceramics. In: Journal of Materials Research. 2003 ; Vol. 18, No. 5. pp. 1067-1072.
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Structure and microwave dielectric properties of (Zn1-xNix)TiO3 ceramics. / Kim, Hyo Tae; Hwang, Joon Cheol; Nam, Joong Hee; Choi, Byung Hyun; Lanagan, Michael T.

In: Journal of Materials Research, Vol. 18, No. 5, 01.01.2003, p. 1067-1072.

Research output: Contribution to journalArticle

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