Single-Calcination Synthesis Of Pyrochlore Free Pb(Mg1/3nb2/3)O-3 Powders Using Particle-Coating Method

Using two-step particle-coating method, pyrochlore-free Pb(Mg1/3Nb2/3)O-3 (PMN) powders have been successfully synthesized by a single calcination step at a relatively lower calcined temperature of 850 degrees C. The XRD and EDS results confirmed that the Mg-citric acid polymeric complex coatings effectively prevent direct contact between PbO and Nb2O5 and thus avoid the formation of pyrochlore phase. The coated powders were calcined directly without the ball-milling procedure at 850 degrees C. The pyrochlore-free PMN powders obtained showed uniform and even grain size. The results showed that this method is an attractive method for the synthesis of PININ-based composite powders.