过滤强化用极性硅盐粉末的鉴别优选

研究了来自新疆、河北、桂林三个产地的不同粒度提纯后极性硅盐粉末样品对空气过滤材料过滤性能影响，采用压电实验、热释电实验对各种极性硅盐粉末样品进行电极性表征鉴别优选.结果表明:桂林粒度0.074mm提纯品位最高的极性硅盐粉末自发极化性能最佳；将3种极性硅盐最高纯度的粉末分别附着滤料表面进行全尘效率实验，桂林粒度0.074mm提纯品位最高极性硅盐粉末对过滤效率提升最显著；采用Rietveld方法对极性硅盐粉末XRD图谱精修得到晶体结构，通过计算固有电偶极矩证明了极性硅盐自发极化产生的静电吸附作用是其提高滤料过滤性能的主要原因.

Identification of Optimal Tourmaline Powders for Filtration Enhancement

The effects of different particle size purified tourmaline powder samples on the filtration performance of air filter materials from Xinjiang， Hebei and Guilin were studied. Electrode performance of various tourmaline powder samples was carried out by piezoelectric experiments and pyroelectric experiments to identify the preferred polarization characterization. The results show that the electrode of the 0.074mm pure grade tourmaline has the best performance. The highest grade of three tourmaline powders is attached to the filter surface for the whole dust efficiency experiment. The 0.074mm pure grade of tourmaline in Guilin has the highest filtration efficiency. The most significant improvement is obtained. Using the Rietveld method， the XRD pattern of tourmaline powder is refined to obtain the crystal structure. The calculation of the intrinsic electric dipole moment proves that the electrostatic adsorption caused by the spontaneous polarization of tourmaline is the main reason for improving the filtration performance of the filter material.