Dielectric BaTiO3–BBSZ glass ceramic composition with ultra-low sintering temperature. Issue 1 (January 2015)

• Record Type: Journal Article
• Authors: Chen, Mei-Yu; Juuti, Jari; Hsi, Chi-Shiung; Chia, Chih-Ta; Jantunen, Heli
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 1(2015:Jan.)
• Page Start: 139
• Page End: 144
• Publication Date: 2015-01
• Subjects: BaTiO3 -- Glass ceramics -- Dielectric properties -- Ultra-low sintering temperature; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2014.08.015
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Composites made from BaTiO3 with a high addition of B2 O3 –Bi2 O3 –SiO2 –ZnO (BBSZ) glass (50–90 wt.%) were sintered at 450 °C and 400 °C. The shrinkage rates of the compositions as a function of temperature were determined by dilatometer. XRD patterns, Raman spectra and microstructures revealed that an additional phase of Bi24 Si2 O40 was formed when samples were sintered at 450 °C and the glass content exceeded 60 wt.%. Composites with an addition of 70 wt.% of BBSZ had ɛ r = 132 and 207 and tan δ = 0.0056 and 0.028 at 100 kHz and 100 MHz, respectively. Notably, at 100 MHz, the additional Bi24 Si2 O40 phase may be the reason that losses of 80–90 wt.% samples were lower than those of BaTiO3 and BBSZ glass. Realized composites with 70–90 wt.% of BBSZ glass sintered at 450 °C exhibited a dense structure, high permittivity and acceptable losses. This makes them suitable for various dielectric applications with ultra-low sintering temperature.