热处理气氛对LFP-玻璃析晶种类与形貌的影响  

THE INFLUENCE OF HEATING-TREATMENT CONDITION ON CRYSTALLIZATION SPECIES AND MORPHOLOGY OF LFP-GLASS

作　　者：李晓生[1] 魏礼杰[1] 林蔚[1] 

机构地区：[1]齐齐哈尔大学材料科学与工程学院,齐齐哈尔161006

出　　处：《中国陶瓷》2012年第3期20-24,共5页China Ceramics

摘　　要：利用相图设计配方,采用熔融法制备LFP-玻璃(锂铁磷酸盐玻璃)粉末。将玻璃粉与柠檬酸混合,在氮气气氛中热处理制备LiFePO4/C复合材料,并考察玻璃在氮气气氛、空气气氛热处理时样品的组成与形貌变化。选用热重/差示扫描量热仪(TG/DSC)、X-射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)对样品进行热性能分析、物相分析、微观形貌分析和元素成分分析。结果显示:玻璃粉在空气气氛中热处理获得Li3Fe2(PO4)3和Fe2O3;玻璃粉在氮气条件下热处理获得Li3Fe2(PO4)3与LiFePO4;玻璃粉与柠檬酸混合在氮气气氛中热处理获得LiFePO4/C复合材料;热处理气氛对LFP-玻璃析晶种类与形貌有直接影响。Making use of diagram to design ingredient; lithium obtained by melting method, The glass powers were mixed with nitric iron phosphate glass powers had been acid and heatingtreated under nitrogen condition to prepare LiFePO4/C composite, meanwhile, the changes of sample＇ s composition and morphology were also observed when glass powers were heatingtreated under nitrogen and air conditions. The sample Ts thermal property, composition, microstructure, element were analyzed by means of thermogravimetric analysis/ differential scanning calorimetry instrument, xray diffraction, scanning electron microscope, energy dispersive x-ray spectroscopy. The result illustrate that： Li3Fe2（PO4）3 and Fe203 were prepared when heating-treat glass under air condition; Li3Fe2（PO4）3 and LiFePQ are prepared when heatingteat glass under nitrogen conditiom LiFePO4/C composite is prepared when heatingtreat glass mixed nitric acid under nitrogen condition; Heating treatment condition has direct influence on the crystallization species and morohologv.

关 键 词：LFP-玻璃 Li3Fe2(PO4)3 LiFePO4 LiFePO4/C复合材料 

分 类 号：TM912[电气工程—电力电子与电力传动]