Structural transition and microwave dielectric properties of ZnNb2O6-TiO2 sintered at low temperatures

Dong Wan Kim; Hee Bum Hong; Kug Sun Hong

doi:10.1143/jjap.41.1465

Structural transition and microwave dielectric properties of ZnNb₂O₆-TiO₂ sintered at low temperatures

Dong Wan Kim, Hee Bum Hong, Kug Sun Hong

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

The addition of CuO to ZnNb₂O₆-TiO₂ significantly lowered the sintering temperature to ∼900°C in comparison to ∼1200°C for samples without CuO. The effect of CuO additions on the phase transitions and microwave dielectric properties of 0.42 ZnNb₂O₆ - 0.58 TiO₂ has been investigated using X-ray powder diffraction and a network analyzer. The structural transition from columbite and rutile to ixiolite was influenced by both the sintering temperature as well as the amount of CuO. These influences, however, were competing. Therefore, it is assumed that the different constitutions of crystal structure of ZnNb₂O₆-TiO₂ samples due to increase either the sintering temperature or the amount of CuO lead to considerable Variation in the microwave dielectric properties. The τ_f was modified to ∼0 ppm/°C, as a result of the variation in phase constitutions as a function of composition.

Original language	English
Pages (from-to)	1465-1469
Number of pages	5
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	41
Issue number	3 A
DOIs	https://doi.org/10.1143/jjap.41.1465
Publication status	Published - 2002 Mar
Externally published	Yes

Keywords

Low-firing
Microwave dielectric properties
Structural transition
TiO
ZnNbO
ZnTiNbO

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/jjap.41.1465

Cite this

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title = "Structural transition and microwave dielectric properties of ZnNb2O6-TiO2 sintered at low temperatures",

abstract = "The addition of CuO to ZnNb2O6-TiO2 significantly lowered the sintering temperature to ∼900°C in comparison to ∼1200°C for samples without CuO. The effect of CuO additions on the phase transitions and microwave dielectric properties of 0.42 ZnNb2O6 - 0.58 TiO2 has been investigated using X-ray powder diffraction and a network analyzer. The structural transition from columbite and rutile to ixiolite was influenced by both the sintering temperature as well as the amount of CuO. These influences, however, were competing. Therefore, it is assumed that the different constitutions of crystal structure of ZnNb2O6-TiO2 samples due to increase either the sintering temperature or the amount of CuO lead to considerable Variation in the microwave dielectric properties. The τf was modified to ∼0 ppm/°C, as a result of the variation in phase constitutions as a function of composition.",

keywords = "Low-firing, Microwave dielectric properties, Structural transition, TiO, ZnNbO, ZnTiNbO",

author = "Kim, {Dong Wan} and Hong, {Hee Bum} and Hong, {Kug Sun}",

year = "2002",

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T1 - Structural transition and microwave dielectric properties of ZnNb2O6-TiO2 sintered at low temperatures

AU - Kim, Dong Wan

AU - Hong, Hee Bum

AU - Hong, Kug Sun

PY - 2002/3

Y1 - 2002/3

N2 - The addition of CuO to ZnNb2O6-TiO2 significantly lowered the sintering temperature to ∼900°C in comparison to ∼1200°C for samples without CuO. The effect of CuO additions on the phase transitions and microwave dielectric properties of 0.42 ZnNb2O6 - 0.58 TiO2 has been investigated using X-ray powder diffraction and a network analyzer. The structural transition from columbite and rutile to ixiolite was influenced by both the sintering temperature as well as the amount of CuO. These influences, however, were competing. Therefore, it is assumed that the different constitutions of crystal structure of ZnNb2O6-TiO2 samples due to increase either the sintering temperature or the amount of CuO lead to considerable Variation in the microwave dielectric properties. The τf was modified to ∼0 ppm/°C, as a result of the variation in phase constitutions as a function of composition.

AB - The addition of CuO to ZnNb2O6-TiO2 significantly lowered the sintering temperature to ∼900°C in comparison to ∼1200°C for samples without CuO. The effect of CuO additions on the phase transitions and microwave dielectric properties of 0.42 ZnNb2O6 - 0.58 TiO2 has been investigated using X-ray powder diffraction and a network analyzer. The structural transition from columbite and rutile to ixiolite was influenced by both the sintering temperature as well as the amount of CuO. These influences, however, were competing. Therefore, it is assumed that the different constitutions of crystal structure of ZnNb2O6-TiO2 samples due to increase either the sintering temperature or the amount of CuO lead to considerable Variation in the microwave dielectric properties. The τf was modified to ∼0 ppm/°C, as a result of the variation in phase constitutions as a function of composition.

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KW - Structural transition

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