Crystal structure and microwave dielectric properties of ZnTi(Nb 1-xTax)2O8 ceramics

Jeong Hyun Park; Young Jin Choi; Sahn Nahm; Jae Gwan Park

doi:10.1016/j.jallcom.2011.03.178

Crystal structure and microwave dielectric properties of ZnTi(Nb _1-xTa_x)₂O₈ ceramics

Jeong Hyun Park
, Young Jin Choi
, Sahn Nahm
, Jae Gwan Park^*

^*Corresponding author for this work

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

29 Citations (Scopus)

Abstract

The crystal structure and microwave dielectric properties of ZnTi(Nb _1-xTa_x)₂O₈ (0 ≤ x ≤ 1) ceramics sintered at 1200 °C for 2 h were investigated. For x < 0.5, solid solution phases with the α-PbO₂ structure, typical of ZnTiNb₂O₈, were obtained, whereas for 0.5 ≤ x < 1, mixtures of two solid solutions each respectively based on the α-PbO ₂ structure and a trirutile structure, were obtained. The relative amount of the trirutile-structured phases increased as the Ta content increased in a given region, and the end member ZnTiTa₂O₈ formed a single phase with the trirutile structure. The microwave dielectric properties were closely related to the crystal structures. A material with a near zero temperature coefficient of resonant frequency could be obtained for x = 0.8, and its dielectric constant and quality factor (Q × f) were 40.5 and 41,000 GHz, respectively.

Original language	English
Pages (from-to)	6908-6912
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	24
DOIs	https://doi.org/10.1016/j.jallcom.2011.03.178
Publication status	Published - 2011 Jun 16

Bibliographical note

Funding Information:
This research was supported by a grant from the Center for Advanced Materials Processing (CAMP) of the Knowledge Economy Frontier R&D Program funded by the Ministry of Knowledge Economy (MKE), Republic of Korea .

Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.

Keywords

Ceramics
Crystal structure
TEM
X-ray diffraction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2011.03.178

Cite this

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title = "Crystal structure and microwave dielectric properties of ZnTi(Nb 1-xTax)2O8 ceramics",

abstract = "The crystal structure and microwave dielectric properties of ZnTi(Nb 1-xTax)2O8 (0 ≤ x ≤ 1) ceramics sintered at 1200 °C for 2 h were investigated. For x < 0.5, solid solution phases with the α-PbO2 structure, typical of ZnTiNb2O8, were obtained, whereas for 0.5 ≤ x < 1, mixtures of two solid solutions each respectively based on the α-PbO 2 structure and a trirutile structure, were obtained. The relative amount of the trirutile-structured phases increased as the Ta content increased in a given region, and the end member ZnTiTa2O8 formed a single phase with the trirutile structure. The microwave dielectric properties were closely related to the crystal structures. A material with a near zero temperature coefficient of resonant frequency could be obtained for x = 0.8, and its dielectric constant and quality factor (Q × f) were 40.5 and 41,000 GHz, respectively.",

keywords = "Ceramics, Crystal structure, TEM, X-ray diffraction",

author = "Park, \{Jeong Hyun\} and Choi, \{Young Jin\} and Sahn Nahm and Park, \{Jae Gwan\}",

note = "Funding Information: This research was supported by a grant from the Center for Advanced Materials Processing (CAMP) of the Knowledge Economy Frontier R\&D Program funded by the Ministry of Knowledge Economy (MKE), Republic of Korea . Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

year = "2011",

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doi = "10.1016/j.jallcom.2011.03.178",

language = "English",

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AU - Choi, Young Jin

AU - Nahm, Sahn

AU - Park, Jae Gwan

N1 - Funding Information: This research was supported by a grant from the Center for Advanced Materials Processing (CAMP) of the Knowledge Economy Frontier R&D Program funded by the Ministry of Knowledge Economy (MKE), Republic of Korea . Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/6/16

Y1 - 2011/6/16

N2 - The crystal structure and microwave dielectric properties of ZnTi(Nb 1-xTax)2O8 (0 ≤ x ≤ 1) ceramics sintered at 1200 °C for 2 h were investigated. For x < 0.5, solid solution phases with the α-PbO2 structure, typical of ZnTiNb2O8, were obtained, whereas for 0.5 ≤ x < 1, mixtures of two solid solutions each respectively based on the α-PbO 2 structure and a trirutile structure, were obtained. The relative amount of the trirutile-structured phases increased as the Ta content increased in a given region, and the end member ZnTiTa2O8 formed a single phase with the trirutile structure. The microwave dielectric properties were closely related to the crystal structures. A material with a near zero temperature coefficient of resonant frequency could be obtained for x = 0.8, and its dielectric constant and quality factor (Q × f) were 40.5 and 41,000 GHz, respectively.

AB - The crystal structure and microwave dielectric properties of ZnTi(Nb 1-xTax)2O8 (0 ≤ x ≤ 1) ceramics sintered at 1200 °C for 2 h were investigated. For x < 0.5, solid solution phases with the α-PbO2 structure, typical of ZnTiNb2O8, were obtained, whereas for 0.5 ≤ x < 1, mixtures of two solid solutions each respectively based on the α-PbO 2 structure and a trirutile structure, were obtained. The relative amount of the trirutile-structured phases increased as the Ta content increased in a given region, and the end member ZnTiTa2O8 formed a single phase with the trirutile structure. The microwave dielectric properties were closely related to the crystal structures. A material with a near zero temperature coefficient of resonant frequency could be obtained for x = 0.8, and its dielectric constant and quality factor (Q × f) were 40.5 and 41,000 GHz, respectively.

KW - Ceramics

KW - Crystal structure

KW - TEM

KW - X-ray diffraction

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