In this section, you can access to the latest technical information related to the FUTURE project topic.

Structure–property relationships of perovskite-structured Ca0.61Nd0.26Ti1-x(Cr0.5Nb0.5)xO3 ceramics

A series of Ca0.61Nd0.26Ti1-x (Cr0.5Nb0.5) x O3 (CNTCNx) (0 ? x ? 0.1) ceramics were prepared via a solid state reaction method. All CNTCNx samples were crystallized into the orthorhombic perovskite structure. The SEM micrographs indicated that the average grain sizes of samples depended on (Cr0.5Nb0.5)4+ concentration. And as (Cr0.5Nb0.5)4+ concentration increased, the average grain size of samples decreased significantly. The short range order (SRO) structure and structural distortion of oxygen octahedra proved to exist in CNTCNx crystals from Raman spectra analysis results. The microwave dielectric properties highly depended on the B-site bond strength, oxygen octahedra distortion, reduction of Ti4+ to Ti3+ and internal strain ?. At last, the CNTCN0.06 ceramic sintered at 1400°C for 4h exhibited good and stable comprehensive microwave dielectric properties of ? r = 92.3, Q × f = 13,889GHz, ? f = + 152.8ppm/°C.

» Author: Zhe Xiong, Chengtao Yang, Bin Tang, Zixuan Fang, Hetuo Chen, Shuren Zhang

» Reference: Ceramics International, Volume 44, Issue 7

» Publication Date: 01/05/2018

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