Structural evolution and microwave dielectric properties of MgO–LiF co-doped Li2TiO3 ceramics for LTCC applications
作者： Nuo-Xin Xu , Jue-Hui Zhou , Hui Yang , Qi-Long Zhang , Min-Jia Wang
DOI: 10.1016/J.CERAMINT.2014.06.134
关键词: Solid solution 、 Mineralogy 、 Ceramic 、 Sintering 、 Chemical engineering 、 Crystal structure 、 Electrode 、 Doping 、 Phase (matter) 、 Monoclinic crystal system 、 Materials science
摘要: Abstract In this study, MgO–LiF co-doped Li 2 TiO 3 ceramics were prepared by the conventional solid-state ceramic route. Continuous solid solutions between , LiF and MgO formed across entire compositional range. With increasing content, degree of long range order decreased, crystalline structure transformed from monoclinic phase to cubic phase. The addition significantly promoted sinterability based successfully reduced sintering temperature. Qf τ f values could be further optimized doping MgO. Well-densified with excellent microwave dielectric properties e r =23.21, =131,668 GHz, =−0.46 ppm/°C was obtained for 0.87Li –0.05MgO–0.08LiF sintered at 950 °C. addition, –MgO–LiF compatible Ag electrodes, making them suitable low-temperature co-fired (LTCC) applications.
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