氧化物添加剂对TiO_2相变和晶粒生长的影响机制  

Mechanisms for the effect of oxide additive on phase transformation and grain growth of titania

作　　者：杨建[1] 薛向欣[2] 王文忠[2] 丘泰[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《功能材料》2005年第7期978-980,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50202004)

摘　　要：添加氧化物可抑制或促进锐钛矿相变,并有效抑制TiO2晶粒生长,从而对TiO2的功能性质产生重要影响。本文归纳了氧化物影响TiO2相变和晶粒生长的机制。对于一种特定的氧化物添加剂,其对相变的影响效果取决于氧化物阴离子的离子半径、价态、配位情况、氧化物的添加工艺、添加量以及材料的处理温度和时间等多种因素的共同作用。氧化物添加剂抑制TiO2晶粒生长的机制与其在显微结构中的分布状况密切相关。Oxide additives have inhibit or promoter function on phase transformation of anatase and can restrain grain growth of TiO2 effectively, by which oxide additives exert a significant influence on functional characters of TiO2. The influence mechanisms of oxide additives are summarized in the present paper. For a given oxide additive, the transformation is affected not only by radius, valence and coordination number of the anion, but also by adding manner and amount of the oxide as well as the calcination temperature and time of the material. The resulting effect is the coaction of all the above factors. The mechanism of inhibiting the grain growth of TiO2 is strongly dependent on the distribution manner of oxide additives in the microstructure of the materials.

关 键 词：TIO2 相变 晶粒生长 氧化物添加剂 影响 机理 

分 类 号：TN304.92[电子电信—物理电子学] TB383[一般工业技术—材料科学与工程]