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The subsolidus phase relations of a ZnO-V 2 O 5-K 2 O system are investigated by X-ray powder diffraction.There is 1 teary compound,11 binary compounds and 14 three-phase regions in this system.The phase diagrams of V 2 O 5 K 2 O with the K 2 O content ranging from 0 to 71 mol% and pseudo-binary system of ZnO-K 2 ZnV 2 O 7 are also studied by X-ray powder diffraction and differential thermal analysis methods.","The subsolidus phase relations of a ZnO-V2O5-K2O system are investigated by X-ray powder diffraction.There is 1 teary compound,11 binary compounds and 14 three-phase regions in this system.The phase diagrams of V2O5-K2O with the K2O content ranging from 0 to 71 mol%and pseudo-binary system of ZnO-K2ZnV2O7 are also studied by X-ray powder diffraction and differential thermal analysis methods.