Ceramics-Silikáty 54 (4) 310-314 (2010)

EFFECTS OF BORON OXIDE ADDITION ON DIELECTRIC PROPERTIES OF LOW LOSS STEATITE CERAMICS

Z. Aslanoglu , H. S. Soykan , Z. Erdem , E. Şentu

Steatite ceramics have been fabricated by using starting materials such as talc, clay, and barium carbonate with addition of boron oxide (B₂O₃). B₂O₃ has been found to be a useful flux to densify MgO–Al₂O₃–SiO₂–BaO (MASB) powders. The steatite ceramic with a relative density of 97% was obtained at a sintering temperature of 1200 °C. The effects of B₂O₃ additions on the dielectric properties of the samples have been investigated. Doping with B₂O₃ significantly affects the dielectric properties. The values of dielectric properties of the samples changes with B₂O₃ addition. This may be attributed to the quartz phase. Hence, a ceramic with lower dielectric loss was obtained for use in high temperature electrical applications.

Keywords: Dielectric properties, Boron oxide, Conductivity, Steatite