What are the effects of high-purity alumina on fillers?

High purity alumina is mainly used in the production of ruby, sapphire, and yttrium aluminum garnet. It has a strong effect on improving the high-temperature strength of refractory materials and enhancing their corrosion resistance. What are the effects of this material on the filling material? The following is the compilation by the editor of Yangzhou Zhongtianli:

Compared with traditional sintered fillers, high-purity alumina micropowder fused corundum fillers have high stability, are easy to obtain suitable particle size and dispersion, and are more suitable for use as fillers. High temperature alumina micropowder fillers for epoxy casting are the development direction. Due to the high Na2O content, fused corundum in the abrasive industry is generally less than 250phr in epoxy resin. This time, the method of introducing boric acid as an additive in the electric melting operation of industrial high-purity alumina raw materials was chosen. During exercise, boric acid reacts with Na2O to produce volatiles, greatly reducing the Na2O content in fused corundum. Industrialization has obtained high-purity and low-cost high-temperature alumina micropowder fillers for fused corundum.

The effects of boric acid content and methods on the reduction of Na2O were studied using X-ray diffraction phase analysis and spectral analysis. By adding boric acid to the aqueous solution and utilizing the nano adsorption properties of industrial high-purity alumina materials to remove Na2O, the content of fused alumina fillers exceeds 350phr. Its epoxy casting material has low initial viscosity, long time, and stable performance.

High purity alumina has the characteristics of high activity and fine particle size. Suitable for molded products and unshaped refractory materials, such as refractory castables, plastic refractory materials, repair materials, spray repair materials, and coatings. The above is all the content organized by the editor of Yangzhou Zhongtianli. If you have any other questions about high-purity aluminum oxide, secondary butanol aluminum, high-purity metal arsenic, etc., please feel free to consult us.