Microwave dielectric properties and microstructure of Ba6−3xNd8+2xTi18−y(Cr1/2Nb1/2)yO54 ceramics

It was evident that the tendency of the τf was consistent with the variation of tolerance factor (t). The τf was much affected by the titling of Ti-O octahedral that bigger ionic radius of (Cr1/2Nb1/2)4+ substituted for Ti4+ would significantly reduce the temperature coefficient of resonant frequency.76