摘要
采用机械化学反应法制备Ce0.8Ti0.2O2复合氧化物,运用差热–热重分析仪、X射线衍射仪、场发射扫描式电子显微镜、zeta电位仪、激光粒度仪等手段对其物相、外观形貌、表面电位、粒度大小等性质进行了表征,通过测定抛光速率和观察表面的微观形貌考察焙烧温度对磨料的ZF7光学玻璃的抛光性能的影响。结果表明:900℃焙烧时所合成的Ce0.8Ti0.2O2为纳米级类球状粉体,它对ZF7光学玻璃的抛光速率达到484nm/min,是纯CeO2磨料(241nm/min)的2倍。Ce0.8Ti0.2O2主要由CeO2和少量的CeTi2O6组成,CeTi2O6的形成不但增大了Ce0.8Ti0.2O2颗粒的负表面电位,促进其悬浮分散稳定性能的提高和增大磨料粒子与玻璃表面硅酸凝胶层间相互接触作用,而且能提高其化学抛光活性,从而导致其光学玻璃抛光性能显著提高。
Ce0.8Ti0.2O2 composite oxide was prepared via a mechanochemical process, and the crystalline phase structure, morphology, zeta potential and particle size were characterized by thermogravimetric-differential scanning calorimetry analysis, X-ray diffraction, field emission scanning electron microscopy and zeta potential analysis. The effect of calcination temperature on the polishing performance of the as-synthesized Ce0.8Ti0.2O2 abrasives for ZF7 optical glass was evaluated by the material removal rate （MRR） and atomic force microscopy. The Ce0.8Ti0.2O2 powder synthesized at 900℃ possesses nano-sized spheroidal morphology and has an MRR value of 484nm/min, which is twice as high as that of pure CeO2 （241 nm/min）. Ce0.8Ti0.2O2 is composed of mostly CeO2 and a little CeTi2O6. The formation of CeTi2O6 not only increases the zeta potential value of Ce0.8Ti0.2O2 particles, which improves the dis- persion and stability of the aqueous suspension as well as the enhancement of the interaction between the abrasives and the siliceous, gelatinous surface layer of glass substrate, but also increases its chemical activity for optical glass polishing. Both the increase of the zeta potential of Ce0.8Ti0.2O2 and the increase of its chemical activity result in a significant improvement of its polishing performance.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2009年第7期1212-1217,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(No.201610002)江西省主要学科学术带头人
计划和江西省自然科学基(NO.02007
No.Q97001)
关键词
机械化学反应法
掺钛氧化铈
钛酸铈
光学玻璃抛光
mechanochemical process
titanium-doping ceria
strontium titanate crystal
polishing for optical glass
