摘要
The LiMg(1鈭?em>x)ZnxPO4 ceramics have been prepared by the solid state ceramic route. The LiMg(1鈭?em>x)ZnxPO4 ceramic retains the orthorhombic structure up to x = 0.2. The compositions with 0.3 鈮?#xA0;x 鈮?#xA0;0.8 exist as a mixture of orthorhombic and monoclinic phases. When Mg2+ is fully replaced with Zn2+ (x = 1.0) complete transition to monoclinic phase occurs. The ceramic with x = 0.1 (LiMg0.9Zn0.1PO4) sintered at 925 掳C exhibits low relative permittivity (蓻r) of 6.7, high quality factor (Qu 脳 f) of 99,700 GHz with a temperature coefficient of resonant frequency (蟿f) of 鈭?2 ppm/掳C. The slightly large 蟿f is adjusted nearly to zero with the addition of TiO2. LiMg0.9Zn0.1PO4-TiO2 composite with 0.12 volume fraction TiO2 sintered at 950 掳C shows good microwave dielectric properties: 蓻r = 10.1, Qu 脳 f = 52,900 GHz and 蟿f = 鈭? ppm/掳C. The ceramic is found to be chemically compatible with silver.