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Authors reported an effective path to increase the electrical conductivity while to decrease the thermalconductivity,and thus to enhance the ZT value by nano-inclusions.By this method,the ZT value ofNb-doped SrTiO3 was enhanced by yttria stabilized zirconia(YSZ)nano-inclusions.TEM images indicated that YSZ inclusions were located inside grain and in triple junction.The YSZ nano-inclusions,with very low thermal conductivity,can reduce the thermal conductivity by effective interface phononscattering.