J Mater Sci Technol ›› 2010, Vol. 26 ›› Issue (4): 351-354.

• Regular Papers • Previous Articles     Next Articles

E®ect of B2O3 Additives on the Sintering and Dielectric Behaviors of CaMgSi2O6 Ceramics

Wang Huanping,Xu ShiQing   

  1. Huanping Wang, Shiqing Xuy, Suya Zhai, Degang Deng and Haidong Ju
    College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China
  • Received:2009-01-16 Revised:2009-06-02 Online:2010-04-30 Published:2010-04-28
  • Contact: Wang Huanping
  • Supported by:

    the Program for New Century Excellent Talents in University (No. NCET-07-0786)
    the Nature Science Foundation of Zhejiang Province (No. R406007) 
    the Science Technology of Zhejiang Province (No. 2008C21054)

Abstract:

The effects of B2O3 addition, as a sintering agent, on the sintering behavior, microstructure and dielectric properties of CaMgSi2O6 ceramic have been investigated. The CaO-MgO-B2O3-SiO2 glassy phase came forth by adding B2O3 into CaO-MgO-SiO2 ceramic powders, and it was advantageous to lower the synthesis temperature of CaMgSi2O6 crystalline phase. Moreover, the emergence of CaO-MgO-B2O3-SiO2 glass phase could effectively lower the sintering temperature of CaMgSi2O6 ceramic and promote the CaMgSi2O6 grains growing. With 6 wt pct B2O3 addition, the densification temperature of CaMgSi2O6 ceramic could be effectively reduced from 1300 to 1100°C, and the dielectric constant (εr) and dielectric loss (tanδ) were: εr=7.61 and tanδ=7.4×10-4 (1 MHz).

Key words: Dielectric properties, Microstructure, CaMgSi2O6 ceramic, B2O3 addition