Effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of the BaTi4O9 ceramics

• Published in: Journal of electroceramics Vol. 17; no. 2-4; pp. 393 - 397
• Main Authors: LIM, Jong-Bong, NAHM, Sahn, KIM, Hyo-Tae, KIM, Jong-Hee, PAIK, Jong-Hoo, LEE, Hwack-Joo
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Heidelberg Springer 01-12-2006; Springer Nature B.V
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Dielectric properties; Electrotechnical and electronic ceramics; Exact sciences and technology; Technical ceramics; Scanning electron microscopy; Temperature; Boron oxide; Electrical properties; Property composition relationship; Barium Titanium Oxides Mixed; Dielectric properties; Composition effect; Experimental study; X ray diffraction; Oxide ceramics; Electronic materials; Additive; Barium oxide; Sintering; Manufacturing; BaTi4O9; Copper oxide; Microstructure; Titanium oxide; BaCu(B2O5); Electroceramics
• ISSN: 1385-3449; 1573-8663
• DOI: 10.1007/s10832-006-9386-2

Issue Title: Special Issue: ICE-2005 International Conference on Electroceramics The effect of B^sub 2^O^sub 3^ and CuO on the sintering temperature and microwave dielectric properties of BaTi^sub 4^O^sub 9^ ceramics was investigated. The BaTi^sub 4^O^sub 9^ ceramics were able to be sintered at 975^sup ^C when B^sub 2^O^sub 3^ was added. This decrease in the sintering temperature of the BaTi^sub 4^O^sub 9^ ceramics upon the addition of B^sub 2^O^sub 3^ is attributed to the formation of BaB^sub 2^O^sub 4^ second phase whose melting temperature is around 900^sup ^C. The B^sub 2^O^sub 3^ added BaTi^sub 4^O^sub 9^ ceramics alone were not sintered below 975^sup ^C, but were sintered at 875^sup ^C when CuO was added. The formation of BaCu(B^sub 2^O^sub 5^) second phase could be responsible for the decrease in the sintering temperature of the CuO and B^sub 2^O^sub 3^ added BaTi^sub 4^O^sub 9^ ceramics. The BaTi^sub 4^O^sub 9^ ceramics containing 2.0 mol% B^sub 2^O^sub 3^ and 5.0 mol% CuO sintered at 900^sup ^C for 2 h have good microwave dielectric properties of ε^sub r^ = 36.3, Q× f = 30,500 GHz and τ^sub f^ = 28.1 ppm/^sup ^C[PUBLICATION ABSTRACT]