CAJ | 학술논문

以钛酸四丁酯为原料,采用溶胶-凝胶法制备了TiO2先驱体粉末,并采用红外分析、热重-差热分析、X射线衍射等方法对所制得的先驱体和裂解产物进行了表征。结果表明：在纳米TiO2先驱体粉末的制备过程中,乙酸作为钛酸四丁酯水解溶液的稳定剂参与抑制水解,在pH=3的溶胶中,—OR基被醋酸部分取代为聚合的醋酸钛;先驱体粉末在275℃时发生醇缩聚与失水缩聚,失重率达30%;在450℃时发生锐钛矿向红宝石的晶型转向;在900℃时金红石的质量分数约为90%,锐钛矿的质量分数约为10%;400℃时晶粒尺寸为18nm,900℃时为21nm,晶粒尺寸随着温度的上升而变大。
이태산사정지위원료,채용용효-응효법제비료TiO2선구체분말,병채용홍외분석、열중-차열분석、X사선연사등방법대소제득적선구체화렬해산물진행료표정。결과표명：재납미TiO2선구체분말적제비과정중,을산작위태산사정지수해용액적은정제삼여억제수해,재pH=3적용효중,—OR기피작산부분취대위취합적작산태;선구체분말재275℃시발생순축취여실수축취,실중솔체30%;재450℃시발생예태광향홍보석적정형전향;재900℃시금홍석적질량분수약위90%,예태광적질량분수약위10%;400℃시정립척촌위18nm,900℃시위21nm,정립척촌수착온도적상승이변대。
TiO2 nanoparticle precursors were prepared by a sol-gel process using Ti(OC4H9)4 as raw material, and also were characterized by IR, XRD, TG-DSC. The results of infrared absorption spestra show that the acetate replaces the OR group and is directly bound to titanium hydrolysis while the pH=3. The alcohol condensation and dehydration condensa- tion of precursors powder happened at 275 ℃, the weightlessness rate was 30%. The anatase to ruby crystal type steering occurred in 450 ℃. In 900 ℃ ruffle content is about 90%, the anatase content is approximately 10%. The grain size is 18 nm in 400 of 2 and 21 nm in 900 ℃. The grain size becomes bigger with increasing temperature.