Microwave dielectric properties of NaBaPO4 ceramics with fast sintering properties
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Phosphate compound with mixed cations, NaBaPO4 can be a new candidate of microwave dielectric ceramics with the basis of the systematically investigations of the ternary compound series of AMPO4 (A = Li, Na, K; M = Ca, Sr, Ba). Ceramics with single phase of NaBaPO4 can be obtained under our optimized experimental sintering conditions for this compounds above, whereas its microstructures and microwave dielectric properties are strongly influenced by the sintering temperatures and holding times. Relatively dense microstructures can be obtained under the sintering conditions of 910 °C/0.5 h, with unique combination of microwave dielectric properties as ε = 8.279, Q × f = 10237 GHz (11.4 GHz) and τf = + 19.07 ppm/°C, and fast sintering characteristics (0.25 – 0.5 h) are the inherent properties of such phosphate compound.
This work was supported by the Talent Introduction Special Found of Anhui Science and Technology University (Grant No. ZRC2012327), the Open Project Program of Key Laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences (Grant No. KLIFMD-2013-04), and the Key Discipline Development Project of Anhui Science and Technology University (AKZDXK2015A01). Authors are thankful to the help of Professor Zhifu Liu on the measurement of microwave properties in the Shanghai Institute of Ceramics, Chinese Academy of Science.
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Conflict of interest
The authors declare that they have no conflict of interest.