Synthesis of <TEX>$Pb(Mg_{1/3}Nb_{2/3})O_3$</TEX> by  <TEX>$Li_2SO_4-Na_2SO_4$</TEX> Molten Salts

,; ,; ,; ,; ,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 30(7); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(7): 543.

$Li_2SO_4-Na_2SO_4$ 용융염에 의한 $Pb(Mg_{1/3}Nb_{2/3})O_3$의 합성

윤기현, 조용수, 남윤우, 강동헌¹

연세대학교 세라믹공학과
¹수원대학교 전자재료공학과

Synthesis of $Pb(Mg_{1/3}Nb_{2/3})O_3$ by $Li_2SO_4-Na_2SO_4$ Molten Salts

ABSTRACT

Stability and formation of Pb(Mg1/3Nb2/3)O3 (PMN) phase synthesized in Li2SO4-Na2SO4 molten salts have been investigated. And powder characteristics of PMN have been studied with a variation of processing parameters such as temperature, time, amount of the salts, and excess PbO. More ratio of Li2SO4 to Na2SO4 influences the percentage of perovskite phase due to the difference of the eutectic point of the salts, but does not influence the powder characteristics. The shape of PMN particles shows faceted morphology with bimodal distribution consisting with large and submicron parts. Particle size of PMN increased greatly with increasing soaking time or amount of salts rather than temperature. The addition of excess PbO resulted in round PMN crystallites without submicron particles. These results are discussed by XRD, SEM and thermal analyses.