Microwave dielectric properties and microstructure of

Cheng Liang Huang; Yao Chung Chen

doi:10.1016/S0921-5093(02)00393-3

Microwave dielectric properties and microstructure of

Cheng Liang Huang, Yao Chung Chen

Department of Electrical Engineering

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

22 Citations (Scopus)

Abstract

The microstructure and microwave dielectric properties of barium samarium titanium oxide Ba_2-xSm_4+2x/3Ti_8+yO₂₄₊2_y (x= 0.1,y=0∼2) ceramics (BST) were investigated. The optimum compositions of BST ceramics were synthesized and discussed base on the structure formula of the tungsten-bronze-type crystal phase. Differential thermal analysis (DTA) was used to select the suitable sintering temperatures. The relative dielectric constant of the BST compositions saturated in a range from 63 to 85. Q × f values of 8500-13000 (GHz) were obtained for various y values in dense samples. The temperature coefficient of resonant frequency _tf was adjusted from a negative -12 ppm per °C value to a positive value 17 ppm per °C. X-ray diffraction, SEM and EDS analysis were used to investigate the microstructure and correlate its relationship with microwave dielectric properties of BST ceramics

Original language	English
Pages (from-to)	106-112
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	345
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5093(02)00393-3
Publication status	Published - 2003 Mar 25

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/S0921-5093(02)00393-3

Cite this

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abstract = "The microstructure and microwave dielectric properties of barium samarium titanium oxide Ba2-xSm4+2x/3Ti8+yO24+2y (x= 0.1,y=0∼2) ceramics (BST) were investigated. The optimum compositions of BST ceramics were synthesized and discussed base on the structure formula of the tungsten-bronze-type crystal phase. Differential thermal analysis (DTA) was used to select the suitable sintering temperatures. The relative dielectric constant of the BST compositions saturated in a range from 63 to 85. Q × f values of 8500-13000 (GHz) were obtained for various y values in dense samples. The temperature coefficient of resonant frequency tf was adjusted from a negative -12 ppm per °C value to a positive value 17 ppm per °C. X-ray diffraction, SEM and EDS analysis were used to investigate the microstructure and correlate its relationship with microwave dielectric properties of BST ceramics",

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Microwave dielectric properties and microstructure of

Abstract

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