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The microwave dielectric properties and microstructures of WO3-doped Mg4Nb2O9 ceramics prepared by the conventional solid-state route were investigated. The prepared ceramics exhibits a mixture of phases Mg4Nb2O9 and Mg5Nb4O15. It is found that low-level doping of WO3 (up to 1.5 wt%) can significantly improve the density and dielectric properties of Mg4Nb2O9 ceramics. At 1330°C, 0.5 wt% WO3-doped...
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