Effect of Sr/P Ratio on the Microwave Dielectric Properties of Sr2P2O7 Ceramics

Authors：Guo Teng; Li Yongxiang^*; Wang Yilin; Wu Wenjun

Source：Ferroelectrics, 2010, 407: 84-92.

DOI：10.1080/00150193.2010.484730

• Sr2P2O7
• Sr3(PO4)2
• microwave dielectric
• ceramics

A pyrophosphate compound, Sr2P2O7, and a mixture, (1-x)Sr2P2O7-xSr3(PO4)2 (x 0.06) were prepared by the solid-state reaction method. The phase evolution and microwave dielectric properties of Sr2P2O7 ceramics were investigated, and the change of dielectric properties was discussed when a minor phase, Sr3(PO4)2 introduced. The results show a mixed phase of Sr2P2O7 and Sr3(PO4)2 could be obtained when the molar ratio of Sr/P 1:1 in the raw material, and when the content of Sr3(PO4)2 increased, the f values of samples increased. In particular, when x = 0.060, good microwave dielectric properties were achieved: epsilon r = 7.9, Q x f = 17200 GHz (at 9.9 GHz) and f = +2.09 ppm/degrees C.

• Institution
  中国科学院; 中国科学院上海硅酸盐研究所