稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2003年
4期
440-443
,共4页
刘心宇%万仁勇%曾中明%成均
劉心宇%萬仁勇%曾中明%成均
류심우%만인용%증중명%성균
material science%BaPbO3%mechanical activation%rare earths
Fifty hours of mechanical activation of mixed oxides at room temperature did not trigger the formation of Nd-BaPbO3 (BPO) in the existence of excessive PbO, but decreased the synthesis temperature of the BPO. The crystalline of the activation-derived perovskite BPO phase was further established when the activated mixture was subjected to calcination at 650 ℃. The perovskite phase was sintered to a density of 98% of theoretical value at 980 ℃ for 2 h. The sintered BPO with 0.1% Nd doped exhibits a resistivity of 2×10-4 Ω*cm and an excellent PTC effect at Curie temperature of 750 ℃.
