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The Production of Dispersible Zirconia Nanocrystals: A Recent Patent Review

机译：可分散的氧化锆纳米晶体的生产：最近的专利审查

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摘要

Zirconia nanocrystals are the best materials to combine with various resins into a transparent high-index composite. Such composite is crucial for the manipulation or enhancement of light in devices such as Organic-Light-Emitting-Diode (OLED) or Liquid-Crystal-Displays (LCD) that surrounds us today. To make a transparent composite, the nanocrystals have to be small (<10nm), un-agglomerated and fully dispersed in resins. They must also be crystalline to provide a better refractive index. Furthermore, since the index of a composite is determined by the volume fraction of the constituents, a substantial increase can only be achieved with a high zirconia loading, usually more than 50wt%. Consequently, the price of zirconia nanocrystals should not be too expensive compared to that of common resins. This requirement excludes many synthesis methods reported in the scientific literatures that employ delicate chemicals or require elaborate procedures. On the other hand, many simpler and large-scale processes for the production of dispersible zirconia nanocrystals have been patented by different companies. A review of the latest development is presented in this paper. Focus is placed particularly on the size, crystalline phase and the dispersibility of the products, as well as on their associated cost.
机译：氧化锆纳米晶体是与各种树脂结合成透明的高折射率复合材料的最佳材料。这种复合材料对于当今围绕我们的设备（例如有机发光二极管（OLED）或液晶显示器（LCD））中的光的操纵或增强至关重要。为了制造透明的复合材料，纳米晶体必须小（<10nm），无团聚并且完全分散在树脂中。它们还必须是结晶的，以提供更好的折射率。此外，由于复合材料的指数由组分的体积分数决定，因此只有在通常大于50wt％的高氧化锆负载下才能实现显着增加。因此，与普通树脂相比，氧化锆纳米晶体的价格不应太贵。该要求不包括科学文献中报道的使用精细化学品或需要精密程序的许多合成方法。另一方面，不同公司已经为生产可分散的氧化锆纳米晶体提供了许多更简单，更大规模的方法的专利。本文介绍了最新进展。重点尤其放在产品的尺寸，结晶相和分散性以及与之相关的成本上。

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