Synthesis and Characterization of Ba_(0.96)Sr_(0.04)Zr_(0.04)Y_(0.005)Ti_(0.955)O_(2.9975) Nano-powders via Polyacrylamide-Gel Method

摘要

Pure tetragonal phase Ba_(0.96)Sr_(0.04)Zr_(0.04)Y_(0.005)Ti_(0.955)O_(2.9975) nano-powders were synthesized via a simple, fast and low cost method: polyacrylamide gel (PAG) method. The effects of processing parameters on the polymerization reaction and the sizes of as-prepared powder were investigated. The results reveal that the critical value of monomer / cross-linking agent ratio is 4.5:1 for the tightest network structure and the smallest average particle size of nano-powder correspondingly due to the smallest grid of gel. The monomer/cross-linking agent ratio and the concentration of cross-linking agent have significant influence on the gel quality and particle. In the investigation range we have probed into, the nano-dispersed BSZYT powders is obtained. The average native grain size of as-prepared powder is ~27 and ~45 nm after calcined at 900℃. and 1200℃. , respectively.