紫外光诱导纳米颗粒胶体射流加工技术利用紫外光场对入射纳米颗粒的催化作用实现对工件表面材料的高效去除。为掌握紫外光诱导纳米颗粒胶体射流加工过程中紫外光束在纳米二氧化钛胶体中的传输特性, 基于纳米二氧化钛胶体对紫外-可见光的吸收及散射理论, 通过系列实验得到紫外-可见光束在不同浓度、吸收层厚度的二氧化钛纳米颗粒胶体中的传输特性及衰减关系。结果表明, 为保证足够强度的紫外光能通过纳米二氧化钛胶体照射在工件表面, 胶体浓度宜控制在500 mol/m3以下, 光-液耦合区胶体吸收层的厚度不宜超过20 mm。

In order to understand the basic principle of ultraviolet induced nanoparticle colloid jet machining and efficiently create ultra-smooth surface of brittle crystals, the properties of ultraviolet-visible beam propagation in TiO2 nanoparticle colloid was studied. The ultraviolet-visible beam before and after transmitting through various concentration and absorption layer thickness of TiO2 nanoparticle colloid was measured by an optical power meter. The attenuation characteristics of ultraviolet-visible beam were obtained by measurement experiment based on the theoretical analysis of light absorption and scattering in colloid. Investigation results indicate that, in order to ensure sufficient intensity of ultraviolet light to transmit through TiO2 nanoparticle colloid and irradiate on the work surface in ultraviolet induced nanoparticle colloid jet machining, the colloid concentration should be controlled less than 500 mol/m3, the absorption layer thickness of light-colloid coupling region should not exceed 20 mm.