No abstract

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 • C and 1200 • C, respectively.