Comparison of the role of boehmite and high-purity alumina in industry, Zhongtianli

Today, the editor of Zhongtianli will discuss with everyone the comparison of the role of boehmite and high-purity alumina in industry. The cellular structure of boehmite determines the difficulty of morphology control, and the activity of electronic transitions points the way for the extension products of boehmite:

1. High density

2. Easy to sinter

3. Easy to porcelain.

A (OH) hydrothermal preparation of boehmite alkaline liquid battery (membrane and electrode coating): Aluminum oxide and boehmite can be used as Lewis acid to analyze lithium salts, release lithium ions, and react with metal lithium to form a Li-A1-O interface layer, improve the interface, inhibit the formation of lithium dendrites, and avoid short circuits. This can provide good protection:

1、 Solid state batteries: Lithium ions need to migrate from the positive electrode to the negative electrode, usually by jumping forward through polymer chains, which are irregular and have a long path; After adding fillers such as boehmite fiber (in-situ generated alumina), it will move and guide the flow along the interface between the filler and the polymer.

2、 Lithium cobalt oxide coating: inhibits the dissolution of Co ions and interfacial reactions. Morphology, activity, and particle size of sodium sulfur batteries: layered, fibrous, rod-shaped, etc. Intercalation and interfacial catalysis in hydrothermal processes are the directions.

3、 Negative electrode materials for the transition of the supply chain: fibrosis and nanomaterialization. Provide electronic transition channels. High end alumina: Boehmite has a diverse morphology, and the inheritance of morphology is its prominent feature.

1. At present, the particle size of boehmite used in new energy is mainly in the range of 0.7 to 1.0m, with a small amount of 1 to 1.5m. Boehmite below 0.6m is prepared by mechanical method. During the grinding process, the crystal morphology of boehmite is damaged, causing an increase in specific surface area, which seriously affects its performance

2. The production of boehmite products below 0.6 microns using chemical methods is a trend. Within 500nm, d10 and d99, and with regular morphology (trend: spherical flakes, fibers, etc.), mechanical and chemical methods are used to produce nearly meter sized boehmite.

Boehmite has advantages such as high whiteness, low oil absorption value, significant dehydration temperature, easy control of crystallinity, and low conductivity. Although there are structural changes in alumina powder, there is a certain inheritance and evolution pattern between the morphology of the obtained powder and its precursor. Its special structure and high sintering activity are often unknown as aluminum sources for structural and functional materials.

The research institute has pioneered a continuous hydrothermal production line for boehmite. We have developed the mechanochemical segmented energy storage template crystallization guided hydrothermal technology (MTCG technology), which has achieved the chemical synthesis of 0.6 micron level boehmite, solved the effective regulation of particle morphology, and prepared ultra-low sodium ultrafine boehmite with different morphologies such as flake, spherical, and diamond. This has solved the problems of directional crystal growth and difficult control of particle size, as well as poor crystal dispersion and particle size distribution. The application fields are distributed in lithium battery separators, porous ceramics, petroleum/coal chemical catalysts, sodium sulfur batteries, flame retardant fillers, etc.

Yangzhou Zhongtianli is a professional manufacturer of high-purity aluminum oxide, with a purity of over 99.9%. Interested parties can follow us.