Title :
Fine PMN powders prepared from nitrate solutions
Author :
Yoshikawa, Yoshio
Author_Institution :
Coll. of Eng., Nihon Univ., Fukushima, Japan
Abstract :
A partial coprecipitation method was developed in order to synthesize lead magnesium niobate Pb(Mg1/3Nb(2/3))O3 (PMN) powders from nitrate solutions. To obtain a niobium precursor compatible with the chemical routes, peroxo-niobium complex solutions were prepared by dissolving hydrated niobia precipitates in a dilute nitric acid solution with hydrogen peroxide. Fine PMN powders were prepared from these nitrate solutions by two-stage hydrolysis. During calcination, these amorphous powders began to crystallize simultaneously to both a cubic pyrochlore phase and a cubic perovskite phase at about 400°C
Keywords :
ferroelectric materials; lead compounds; powder technology; powders; precipitation; 400 C; H2O2; H2O2-Nb; HNO3; PMN; Pb(Mg13/Nb(2/3))O3; PbMgO3NbO3; calcination; cubic perovskite phase; cubic pyrochlore phase; dilute nitric acid solution; dissolving hydrated niobia precipitates; fine PMN powders; hydrogen peroxide; nitrate solutions; peroxo-niobium complex solutions; two-stage hydrolysis; Calcination; Ceramics; Chemical processes; Educational institutions; Kinetic theory; Lead compounds; Magnesium compounds; Niobium compounds; Powders; Solid state circuits;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522306
