共搜索到441条信息，每页显示10条信息，共45页。用时：0小时0分0秒453毫秒
, CHCl3的降解率先是急剧上升, 而x(Ce3+)>0.020时, 其增势趋缓. 关键词: 纳米二氧化钛; 稀土; 三氯甲烷; 过渡金属离子; 共掺杂; 光催化 中图分类号: O614 文献标识码: A Phase transition of Fe3+, Ce3+ co-doped nanosized titania and its photocatalytic performance... of trichloromethane at x(Fe3+)=0.020. But the degradation of trichloromethane firstly increases rapidly, then it rises slowly when the mole fraction of Ce3+ is over 0.020. Key words: nanosized titania; rare earth......
and low grade titania feedstock by activated roasting-acidic leaching GUO Yu-feng, XIAO Chun-mei, JIANG Tao, QIU Guan-zhou, HUANG Zhu-cheng, DONG Hai-gang (School of Resources Processing... for preparation of pigment and sponge titanium. Thermodynamic analysis shows that solid solution of anosvite(Me3O5) in titania feedstock is damaged and the impurities (Fe, Mg, Ca, etc) dissolve into solution......
resistance than plasma sprayed Al203+ 13% Tioz coating does. Key words: Al203 nano-particle; alumina, titania, plasma spraying; composite ceramic coating; laser cladding 滁层技术与材...[J].Journal of the European Ceramic Society, 2002, 22: 347 - 351. [7] ZHU Ying-chun, DING Chuan-xian. Characterization of plasma sprayed nano-titania coatings by impedance spec- troscopy[ J]. Journal......
层与基体结合强度高, 均超过30MPa; 弹性模量随着电压的升高而升高, 这与薄膜的晶体结构发生变化有关. 关键词: 等离子体氧化; 结合强度; 弹性模量; 钛 中图分类号: TG146.4 文献标识码: A Microstructures and mechanical properties of titania films by plasma electrolyte oxidation... was processed by plasma electrolyte oxidation. The microstructure, crystal structure bonding strength and elastic modulus of the film were discussed. The results show that a porous titania is formed......
of doped Ce3+ when the mole fraction of Fe3+ is at constant 2.0%. Key words: rare earth; transition metal ions; co-doping; nanosized titania; spectrum electrochemistry ......
titania; fluoride ion (F-); adsorption; [全文内容正在添加中] ......
钛溶胶复合有机硅涂层材料的制备与表征 骆珍珍1,王芳2,罗仲宽2,青双桂2,李瑞菲1 (1.深圳大学化学与化工学院,深圳,518060;2.浙江加州国际纳米技术研究院,杭州,310029;3.深圳大学化学与化工学院,深圳 518060) 摘要:以钛酸丁酯(TBT)和γ-(2,3-环氧丙氧)丙基三甲氧基硅烷(GLYMO)为原料,通过溶胶-凝胶法制备了一类钛溶胶复合有机硅涂层材料,并采用多种手段对复合涂层的微结构和光学性质进行了表征.结果表明,所得复合涂层材料的表面平整光滑,可见光透过率在91%以上.随着钛含量的增加,涂层的折射率在1.49~1.56(633nm)范围内呈上升趋势. 关键词:钛溶胶; 有机硅; 涂层; titania; silicone; films; [全文内容正在添加中] ......
; 硫酸改性; 界面极化; 电流变性能; titania; sulfuric acid; interfacial polarization; electrorheological effect; [全文内容正在添加中] ......
液相反应制备纳米锐钛矿相二氧化钛 郭存济1,毛日华1 (1.上海大学材料科学与工程学院,上海 201800) 摘要:采用醇盐的乙醇溶液,在70°C下水解与结晶分步进行,制备了纳米锐钛矿相二氧化钛胶体及粉体.以XRD,BET,TEM,HREM,TG--DTA等方法对胶体及粉体进行了表征.高分辨透射电子显微镜分析表明,所得胶体中二氧化钛晶形发育完整,220°C处理后粒子平均粒径为9nm,比表面积171m2/g. 关键词:二氧化钛; 纳米; 胶体; 锐钛矿; titania; nanonmeter; colloid; anatase; [全文内容正在添加中] ......
四氯化钛水解法制备二氧化钛纳米晶的影响因素 高濂1,郭景坤1,张青红1 (1.中科院上海硅酸盐研究所高性能陶瓷和超微结构国家重点试验室,上海 200050) 摘要:研究了四氯化钛水解法制备的二氧化钛纳米晶工艺中水解温度和硫酸根离子对粉体性能的影响．室温下的水解产物为无定形结构,这种粉体有着很大的比表面积,其孔为介孔尺度；添加少量的硫酸根离子使粉体的孔径在2~5nm,最可几孔径为3．8nm．提高水解温度能得到金红石与锐钛矿相的混晶,同样的水解温度下,添加少量的硫酸根离子则为纯锐钛矿相．用 XRD,TEM,DRS和BET等方法对粉体的性能进行了表征,混晶紫外 -可见漫反射光谱不同于两种纳米晶机械混合物． 关键词:纳米晶; 二氧化钛; 锐钛矿; 金红石; 四氯化钛水解; nanocrystalline; titania; anatase; rutile; TiC l4......
