Boehmite (BMS)

Greatsun Aopeng's boehmite is an ultra-fine, high-purity alumina precursor powder material.This product features a precisely controllable particle size range with uniform particle size distribution. Its median particle size remains stable between 1.4 and 2.0 micrometers, with a low proportion of coarse particles; oversized particles that compromise application performance are rarely present.

The bulk density of the powder ranges from 0.2 to 0.50 g/cm³, rendering the powder loose and easy to disperse. Its specific surface area is controlled within 4.5 m²/g to avoid excessive adsorption of auxiliary additives. The material boasts mild acidity and alkalinity, with a pH value maintained at 7.0–9.0, free from strong acid or alkaline corrosivity.

In addition, we enforce stringent standards for impurity control. Trace hazardous metallic elements including iron, sodium, calcium and potassium are restricted to extremely low ppm levels, delivering high overall purity. There is minimal batch-to-batch fluctuation in particle size and impurity indicators, resulting in consistent, stable quality across all lots. The powder can be directly adopted for all types of fine processing and blending procedures.

The most critical application of this high-purity boehmite is as a surface coating for lithium battery separators. After coating, it significantly enhances the battery's high-temperature resistance and puncture resistance, thereby ensuring the safety of power batteries. Secondly, it serves as a raw material for producing high-purity alumina; when calcined at high temperatures, it is used to manufacture precision electronic ceramics and refractory ceramic components. In the chemical industry, it can function as a catalyst carrier, where its low impurity content ensures that it does not interfere with catalytic reactions. It can also be added to plastics and resins as an environmentally friendly flame-retardant filler. Additionally, it is utilized in applications such as high-end electronic insulating fillers and polishing abrasives for optical materials. It is well-suited for industries including new energy batteries, fine chemicals, advanced ceramics, and electronics manufacturing—all sectors that demand high purity and precise particle size in powder materials.

The core advantages of this product are its uniform particle size distribution and extremely low impurity content. The particle size range is narrow and consistent, ensuring good dispersion during spraying or compounding processes, with minimal agglomeration or equipment blockage. Various metallic impurities are strictly controlled, with potassium content kept below 10 ppm, preventing contamination of high-precision products such as lithium batteries and electronic components. The moderate specific surface area does not adsorb excessive solvent, reducing auxiliary material consumption and lowering processing costs. The mild pH level ensures no corrosion of production equipment over long-term use. The powder exhibits moderate bulk density and excellent flowability, making it highly compatible with automated feeding and separator coating processes. Additionally, each batch delivers consistent performance, making it suitable for large‑scale continuous production in factories.