Sintering Behavior and Dielectric Properties of BaTiO3 Ceramics With Glass Addition for Internal Capacitor for LTCC

Particulate Materials Research Center, Department of Resources Engineering, National Cheng Kung University, Tainan, Taiwan, ROC
Journal of Alloys and Compounds (Impact Factor: 3). 07/2008; 459(1-2):307-310. DOI: 10.1016/j.jallcom.2007.04.218


The addition effects of ZnO–B 2 O 3 –SiO 2 (ZBS) glass on both the sintering behavior and dielectric properties of BaTiO 3 were investigated in developing low-temperature-fired BaTiO 3 -based ceramics for LTCC devices. X-ray diffractometer (XRD), scanning electron microscopy (SEM), and a dilatometer were used to examine the effect of ZBS glass on BaTiO 3 densification and the chemical reaction between the glass and BaTiO 3 . The results indicate that ZBS glass can be used as a sintering aid to reduce the sintering temperature of BaTiO 3 from 1300 to 900 • C without secondary phase formation. The dielectric properties of BaTiO 3 with ZBS glass sintered at 900 • C show a relative density of 95%, a high dielectric constant of 994, and a dielectric loss of 1.6%.

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    • "Some previous studies have shown that low-melting glasses added in the ceramics, such as B 2 O 3 – SiO 2 [5], BaO–ZnO–B 2 O 3 [6], ZnO–B 2 O 3 [7] [8] and ZnO– B 2 O 3 –SiO 2 [9], have the advantages of lowering sintering temperatures and enhancing densification of materials. For instance, ZnO–B 2 O 3 –SiO 2 glass has been demonstrated to be good flux former to reduce the sintering temperature of BaTiO 3 ceramics from 1300 1C to 900 1C [9]. Moreover, the addition of glass has been reported as to be an effective "
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    • "Therefore, new middle-and high-k type dielectric materials, e.g. Bi 2 (Zn 1/3 Nb 2/3 ) 2 O 7 -based dielectric tape with dielectric constant 80 and dielectric loss 0.001 (Bennet et al., 2007) or BaTiO 3 with ZnO-B 2 O 3 -SiO 2 glass with dielectric constant of about 1,000 and dielectric loss of 0.016 (Hsiang et al., 2008), compatible with LTCC technology are developed and investigated. "
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