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((Nd0.7Yb0.3)1-xSmx)2Zr2O7(0≤x≤1.0)ceramics have been synthesized by pressureless sintering by tailoring the chemical compositions and sintering parameters.The microstructure of((Nd0.7Yb0.3)1-xSmx)2Zr2O7 were investigated by X-ray diffraction(XRD),Raman spectroscopy and scanning electron microscopy(SEM).The electrical conductivity and thermal expansion coefficients of((Nd0.7Yb0.3)1-xSmx)2Zr2O7 were investigated by AC impedance spectroscopy and a push-rod dilatometer.