The effect of adding phosphorus to high-purity alumina

The appearance of high-purity alumina is white micro powder, which is used to manufacture abrasives for glass, metals, semiconductors, and plastics. What is the effect of adding phosphorus to this alumina? Many people may not be familiar with this issue. Today, let's follow the high-purity alumina manufacturer Yangzhou Zhongtianli to learn more.

1、Phosphorus exists in an amorphous state on the surface of high-purity alumina, changing the quantity and properties of surface hydroxyl groups, restricting the dehydroxylation sintering and particle growth of alumina, and improving its thermal stability.

2. The stabilizing mechanism of phosphorus on the regeneration agent of high-purity alumina. The more uniform the distribution of aluminum oxide and phosphorus, the stronger the binding, and the more stable the effect. Different introduction methods change the coordination of aluminum ions in aluminum oxide. The more hexavalent aluminum ions, the more stable the active aluminum oxide regeneration agent.

3. Phosphorus exists in the form of monophosphate in high-purity alumina, which restricts the bulk diffusion of aluminum ions, thereby increasing the phase transition temperature of alumina. In addition, in water vapor environments, Al-OH is replaced by P-OH, which is difficult to remove, greatly improving the hydrothermal stability of activated alumina.

4. During the hydrolysis and calcination process, phosphorus changes from -3 valence to 5 valence, increasing alumina and anionic vacancies, thereby increasing the surface alkalinity of alumina.

High purity alumina is suitable for molded products and amorphous refractory materials, such as refractory castables, plastic refractory materials, repair materials, spray repair materials, and plastering materials. We hope the above content is helpful to you. The above is the relevant content about high-purity alumina organized by Yangzhou Zhongtianli, a manufacturer of high-purity alumina, hoping to provide some help to everyone. If you would like to learn more about the preparation of boehmite, please feel free to contact us. Yangzhou Zhongtianli New Materials Co., Ltd. is a technology enterprise specializing in the production of isopropanol aluminum, isopropanol aluminum trimer, secondary butanol aluminum, pseudo boehmite, high-purity arsenic, high-purity aluminum oxide, etc. It has multiple technologies and has received unanimous praise in the industry.