采用醇/水混合溶剂方法制备了不同粒径的纳米BaF2粉体,研究了粉体的热稳定性.结果表明,纳米BaF2粉体的粒径随着混合溶剂中乙醇含量的提高而减小,粉体的形貌和分散性也都随之改变.根据在不同升温速率下测量的每种粒径纳米BaF2粉体的DSC曲线,由Kissinger方程求出了各晶粒长大激活能.BaF2晶粒长大激活能随着粉体粒径的减小而线性地减小,纳米晶BaF2的热稳定性随着粒径的减小而降低.
参考文献
[1] | W.BollMann,Ionic conductivity of pure and doped BaF2 crystals,Phys.Stat.Sol.,18(á),313(1973) |
[2] | S.N.S.Reddy,R.A.Rapp.Electronic conduction in the BaF2 solid electrolyte,J.Electrochem.Soc.:Solid-State Science and Technology,126,2023(1979) |
[3] | Satoru Fujitsu,Masaru Miyayama,Kunihito Koumoto,Hiroaki Yanagida,Enhancement of ionic conduction in CaF2 and BaF2 by dispersion of Al2O3,Journal of Materials Science,20,2103(1985) |
[4] | B.M.Voronin,S.V.Volkov,Ionic conductivity of fluorite type crystals CaF2,SrF2,BaF2,and SrCl2 at high temperature,Journal of Physics and Chemistry of Solids,62,1349(2001) |
[5] | N.I.Sorokin,M.W.Breiter,Anionic conductivity and thermal stability of single crystals of solid solutions based on barium fluoride,Solid State Ionics,99,241(1997) |
[6] | X.J.Wu,F.Su,X.Y.Qin,B.Xie,X.L.Ji,Synthesis and ionic conductivity of nanophase Ca1-LaxF2+x,Mater.Res.Soc.Symp.Proc,286,21(1993) |
[7] | F.Su,X.J.Wu,X.Y.Qin,B.Xie,Ionic conduction of nanophase Ca1-xLaxF2+x,Chinese Science Bulletin,38,1518(1993) |
[8] | W.Puin,P.Heitjans,Frequency dependent ionic conductivity in nanocrystalline CaF2 studied by impedance spectroscopy,Nanostructured Mater.,6,885(1995) |
[9] | LIU Jinfang,WU Xijun,XU Guoliang,ZHOU Ynsong,LI Binghan,Influence of consolidated pressure upon phase transition and ionic conductivity of nanophase PbF2,Chinese Journal of High Pressure Physics,14,16(2000)(刘金芳,吴希俊,许国梁,周宇松,李冰寒,固相压强对纳米PbF2的相变和离子电导率的影响,高压物理学报,14,16(2000)) |
[10] | LIU Jinfang,WU Xijun,XU Guoliang,WANG Pingchu,Preparation,phase constitution and ionic conductivity of nanophase PbF2,Journal of Inorganic Materials,15,447(2000)(刘金芳,吴希俊,许国梁,王评初,纳米PbF2的制备、物相组成和离子导电性,无机材料学报,15,447(2000)) |
[11] | R.N.Hua,C.Y.Zang,C.Sha,D.M.Xie,C.S.Shi,Synthesis of barium fluoride nanoparticles from microemulsion.Nanotechnology,14,588(2003) |
[12] | Robert N.Grass,Weridelin J.Stark,Flame synthesis of calcium-,strontium-,barium fluoride nanoparticles and sodium chloride,Chem.Commun.,1967(2005) |
[13] | H.E.Kiesinger.Reaction kinetics in difierential thermal analysis,Anal.chem.,29,1702(1957) |
[14] | L.C.Chen,F.Spaepen,Analysis of calorimetric measurements of grain growth,J.Appl.Phys.,69,679(1991) |
[15] | WU Qiuyun,SUN Nianxiang,WANG Yucheng,SUN Xiukui,HU Zhuangqi,Microstructure and thermal stability of electrodeposited nano-nickel,Chinese Journal of Materials Research,11,313(1997)(吴秋允,孙年祥,王雨晨,孙秀魁,胡壮麒,电镀纳米镍的结构及热稳定性,材料研究学报,11,313(1997)) |
[16] | LI Jigang,WU Xijun,TAN Hongbo,LIU Jinfang,The preparation and thermal stability study of nanocrystalline tungsten carbide powder,Rare Metal Materials and Engineering,33,736(2004)(李继刚,吴希俊,谭洪波,刘金芳,纳米碳化钨粉的制备及其热稳定性研究,稀有金属材料与工程,33,736(2004)) |
[17] | WU Daxiong,WU Xijun,LU Yanfei,WANG Hui,The study on preparation and thermal stability of nanocrystalline LaF3 bulk material,Rare Metal Materials and Engineering,27,212(2006)(吴大雄,吴希俊,吕燕飞,王晖,纳米LaF3块体的制备及其热稳定性研究,稀有金属材料与工程,27,212(2006)) |
[18] | YAO Lianzeng,YE Changhui,MOU Jimei,LI Yuanhong,Thermal stability study of nano-palladium,Chinese Journal of Chemical Physics,84,13(2000)(姚连增,叶长辉,牟季美,李远红,纳米Pd粉的热稳定性研究,化学物理学报,84,13(2000)) |
[19] | L.Lu,N.R.Tao,L.B.Wang,B.Z.Ding,K.Lu,Grain growth and strain release in nanocrystalline copper,J.Appl.Phys.,89,6408(2001) |
[20] | K.Lu,W.D.Wei,J.T.Wang,Grain growth kinetics and interfacial energies in nanocrystalline Ni-P alloys,J.Appl.Phys.,69,7345(1991) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%