Features of forming microstructure of piezoelectric materials on the basis plasma-chemical superdispersed powders of LZT type

摘要

The process to form the microstructure of piezoelectric materials on the basis of plasma-chemical superdispersed powders of lead zirconate-titanate (LZT) type produced by denitration of nitrate solutions in HF-plasma discharge by example of LZT St-S and LZT-36 was investigated. The phase composition of sintered samples was determined by diffraction method and their microstructures did by metallographic method. The investigations executed have shown the single-phase products to form at T_(sint)= 1100 deg C and tau_(sint) > 5 min. Sintering is accompanied by the processes of collecting recrystallization. An optimum Sintering mode for both powders was determined when ceramics with isomeric grain structure, minor grain size spread, and higher electrophysical properties.