材料期刊网

The synthesis of nanosized, homogeneous Ba(Ti0.8Zr0.2)O3 (BTZ) powders from cheap raw materials BaCl2, TiCl4, and ZrOCl2 can be achieved by a simple precipitation process operated at a temperature less than 100℃. Characterization via scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) analysis confirms that the as-prepared powder is ~100 nm with a narrow size distribution. It is also well dispersed because the particle size from SEM observation is almost the same as from BET calculation. Characterization via powder X-ray diffraction (XRD) confirms that the phase of the as-precipitated powder is not the simple mixture of BaTiO3 and BaZrO3 phases but is clearly crystallized as monophasic Ba(Ti0.8Zr0.2)O3 (BTZ) and no other phases have been detected, although the initial concentration ratio of [BaCl2]/[TiCl4+ZrOCl2] varies from 1.0 to 2.0. The dielectric behavior of as-prepared BTZ powder is then investigated and it is found that the change in the dielectric constant during the tested temperature does not exceed 30% and with very low dissipation factor. So, the as-prepared BTZ powder is suitable for MLCC.