Abstract
Abstract The LiMgPO4 ceramic has been prepared through the solid state ceramic route. The powder has an average particle size of 1.1 μm and BET surface area of 2.7 m2 g−1. Good dispersion of LiMgPO4 has been achieved in ethanol/xylene mixture with the addition of 2 wt.% fish oil. The tape casting slurry of LiMgPO4 with typical pseudoplastic behavior has been prepared and cast into thin tapes of thickness 70 μm. LiMgPO4 green tape shows a tensile strength of 0.22 MPa and average surface roughness of 0.25 μm. The green tape has an ɛr of 3.2 and tan δ of 0.0688 at 5 GHz. The thermo-laminated tape (4 layers) sintered at 950 °C/2 h shows good microwave dielectric properties: ɛr = 6.4 and tan δ = 0.0002. LiMgPO4 has a coefficient of thermal expansion of 10.5 ppm/°C and thermal conductivity of 7.1 W m−1 K−1.
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