Microwave Dielectric Properties of LTCC Materials Consisting of BaO-TiO2-SiO2-Al2O3 Glass - BaNd2Ti5O14 Ceramic Composites

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The desirable characteristics of the microwave materials include excellent dielectric constant εr, low dielectric loss (high quality factor, Q*f0 value), and small temperature coefficient (~0ppm/°C) of resonant frequency (Tf). The advantages of using a glass-ceramic include shape stability during the sintering stage, improved dielectric properties, mechanical strength, and controlled thermal expansivity. In the present study, glass-ceramic compositions consisting of a glass system (BaO-TiO2-SiO2-Al2O3) and a ceramic filer (BaNd2Ti5O14) were prepared. The glass and glass-ceramic compositions were evaluated for sintering behavior such as shrinkage, densities, thermal properties, and microstructures. In addition, the microwave dielectric properties (≈ 15~20 for εr, > 6000 GHz for Q*f0) were determined by a network analyzer at 6-8 GHz. These results suggest that the compositions can be a candidate for LTCC dielectric materials.

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Periodical:

Materials Science Forum (Volumes 486-487)

Edited by:

Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee

Pages:

506-509

Citation:

Y. J. Kim et al., "Microwave Dielectric Properties of LTCC Materials Consisting of BaO-TiO2-SiO2-Al2O3 Glass - BaNd2Ti5O14 Ceramic Composites", Materials Science Forum, Vols. 486-487, pp. 506-509, 2005

Online since:

June 2005

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$38.00

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