Synthesis of scandia-stabilized zirconia nanoparticles by the polyacrylamide technique
The synthesis of ZrO2:10 mol% Se2O3 powders by the polyacrylamide technique was carried out using zirconium and scandium precursor solutions, acrylamide, N,N-methylene-bisacrylamide and ammonium persulfate. The polymerization process occurred in few seconds and, without any precipitation, transparent polymeric gels were obtained. Calcination of the gels produced nanosized ceramic powders fully stabilized in the cubic fluorite structure. High specific surface area powders of 78 m2/g, corresponding to～13 run average particle size for an average crystallite size of 5 nm, evaluated by X-ray diffraction, were obtained after calcination at 500℃. The powders were characterized by in situ high temperature X-ray diffraction and scanning electron microscopy. Pellets sintered at 1500℃ show high values of oxide ion conductivity.
Nanostructured materials Chemical synthesis Electrochemical impedance spectroscopy
G.C.C.Costa R.Muccillo
Centro Multidisciplinar para o Desenvolvimento de Materials Cerdmicos -CMDMC CCTM -Institute de Pesquisas Energeticas e Nucleares, Travessa R 400, Cidade Universitaria S.Paulo, SP, Brazil 05508-900
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1219-1222
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）