High-Q microwave dielectric in the (1-x)MgTiO3-xCa(0.6)La(0.8/3)TiO(3) ceramic system with a near-zero temperature coefficient of the resonant frequency

作者：Huang Cheng Liang^*; Liu Shih Sheng

来源：Materials Letters, 2008, 62(17-18): 3205-3208.

DOI：10.1016/j.matlet.2008.02.020

• MgTiO3
• Ca0.6La0.8/3TiO3
• microwave dielectric properties
• low loss

The microwave dielectric properties and microstructures of the new (1-x)MgTiO3-xCa(0.6)La(0.8/3)TiO(3) ceramic system, prepared using a mixed oxide route, were investigated. Combination of MgTiO3 (MT) and Ca0.6La0.8/3TiO3 (CLT) forms a two-phase system and leads to a near-zero tau(f). With increasing x, the microwave Q x f decreased and epsilon(r), increased. A microwave dielectric material having a epsilon(r), of 25.45, a Q x f of similar to 82,500 GHz (at 8.5 GHz), and a tau(f) of similar to 0.5 ppm/degrees C can be obtained from the compound 0.85MgTiO(3)-0.15Ca(0.6)La(0.8/3)TiO(3) sintered at 1275 degrees C for 4 It. It is proposed as a candidate material for ISM band components and GPS antennas.

• 出版日期2008-6-30