稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2004年
6期
913-916
,共4页
王甲辰%杨军%刘向生%黄小卫%范玉斌%伍艳平
王甲辰%楊軍%劉嚮生%黃小衛%範玉斌%伍豔平
왕갑신%양군%류향생%황소위%범옥빈%오염평
nano La2O3 alkalescent ammonium citrate%homogeneous precipitation%biological effect%rare earths
Using alkalescent ammonium(AAC)as precipitatnt, the diameter of nano La2O3 powder with diameter in 80 nm and less was prepared by the method of homogeneous precipitation, and reactant concentration, temperature and pH were studied and confirmed. The best precipitated concentration is from 0.2 to 0.5 mol·L-1, and the diameter of compounded powder turns small as the temperature gradually becomes high, and the pH from 6 to 8 is the best and the concentration of precipitant does not affect the diameter of compounded powder significantly. Meanwhile, most experiments lasting for fifty days in the greenhouse, and the results are 0.2 g·kg-1 nano La2O3 powder is enorgh for increasing biomass by 133% compared with that of the CK.
