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Ce_(0.8)Ti_(0.2)O_2复合氧化物的制备及其光学玻璃的抛光性能

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Abstract:

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。

References

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