【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。更多还原

【Abstract】 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.更多还原