Microstructure Evolution of the Templated Grain Growth in Textured Pb(Mg_1/3Nb_2/3)_0.67Ti_0.33O₃ by Excess PbO Addition

Abstract

Effect of excess lead oxide and sintering temperature on the microstructure evolution in the templated grain growth of the Pb(Mg_1/3Nb_2/3)_0.67Ti_0.33O₃ (PMNT) ceramics were investigated. By adding excess PbO in the precursor of PMNT, the textured structure of PMNT polycrystals was obtained near SrTiO₃ template by the conventional ceramic technique. The texture profiles developed progressively with increasing the concentration of excess PbO. A suitable sintering temperature is also very essential to grow a thicker textured layer and avoid a secondary pyrochlore phase.

Keywords:

• Microstructure
• PMNT
• sintering
• grain growth