Phase constitutions and microwave dielectric properties of Zn3Nb2O8-TiO2

Dong-Wan Kim, J. H. Kim, J. R. Kim, K. S. Hong

Research output: Contribution to journalArticle

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Abstract

The phase constitutions and microwave dielectric properties of (1 - x)Zn3Nb2O8-xTiO2 were investigated using X-ray powder diffraction and a network analyzer, respectively. Four mixture regions were studied with increasing TiO2 content (x): (1) Zn3Nb2O8, ZnNb2O6, and Zn2TiO4, (0 < x ≤ 0.5) (2) ZnNb2O6 and Zn2TiO4, (0.5 < x < 0.65) (3) Zn2TiO4, ZnTiNb2O8, and TiO2 (0.65 ≤ x ≤ 0.75), (4) Zn2TiO4 and TiO2 (0.75 < x < 1). This structural evolution with composition was ascribed to the interrelations between Zn3Nb2O8 and TiO2. It was demonstrated that the microwave dielectric properties correlated to crystal structure rather than chemical composition. In the mixture region of Zn2TiO4, ZnTiNb2O8, and and Zn2TiO4, the amount of TiO2 and ZnTiNb2O8 considerably increased and decreased, respectively, with increasing TiO2 content (x). This resulted in the increase of relative dielectric constant (εγ) and temperature coefficient of resonant frequency (τf). At x = 0.725, Q × f is 5190 GHz, εγ and τf are 36 and 4 ppm/°C, respectively.

Original languageEnglish
Pages (from-to)5994-5998
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume40
Issue number10
Publication statusPublished - 2001 Oct 1
Externally publishedYes

Fingerprint

constitution
Dielectric properties
dielectric properties
Microwaves
microwaves
Electric network analyzers
Chemical analysis
X ray powder diffraction
resonant frequencies
Natural frequencies
analyzers
chemical composition
Permittivity
Crystal structure
permittivity
crystal structure
coefficients
diffraction
x rays
Temperature

Keywords

  • Crystal structure
  • Microwave properties
  • Mixture
  • Phase constitutions
  • TiO
  • ZnNbO

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Phase constitutions and microwave dielectric properties of Zn3Nb2O8-TiO2 . / Kim, Dong-Wan; Kim, J. H.; Kim, J. R.; Hong, K. S.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 40, No. 10, 01.10.2001, p. 5994-5998.

Research output: Contribution to journalArticle

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AB - The phase constitutions and microwave dielectric properties of (1 - x)Zn3Nb2O8-xTiO2 were investigated using X-ray powder diffraction and a network analyzer, respectively. Four mixture regions were studied with increasing TiO2 content (x): (1) Zn3Nb2O8, ZnNb2O6, and Zn2TiO4, (0 < x ≤ 0.5) (2) ZnNb2O6 and Zn2TiO4, (0.5 < x < 0.65) (3) Zn2TiO4, ZnTiNb2O8, and TiO2 (0.65 ≤ x ≤ 0.75), (4) Zn2TiO4 and TiO2 (0.75 < x < 1). This structural evolution with composition was ascribed to the interrelations between Zn3Nb2O8 and TiO2. It was demonstrated that the microwave dielectric properties correlated to crystal structure rather than chemical composition. In the mixture region of Zn2TiO4, ZnTiNb2O8, and and Zn2TiO4, the amount of TiO2 and ZnTiNb2O8 considerably increased and decreased, respectively, with increasing TiO2 content (x). This resulted in the increase of relative dielectric constant (εγ) and temperature coefficient of resonant frequency (τf). At x = 0.725, Q × f is 5190 GHz, εγ and τf are 36 and 4 ppm/°C, respectively.

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