What role does white aluminum oxide play as a filler?
As a filler, white aluminum oxide can play the following roles in different material systems:
1. Enhance the physical properties of materials
Improve hardness and wear resistance
The high hardness of white aluminum oxide (Mohs hardness 9.0) can significantly enhance the wear resistance of the substrate.
For example:
In coatings, it can improve the anti-friction ability of coatings and extend the service life of floor and automobile coatings;
In ceramics, it can improve the wear resistance and compressive strength of products;
In mortar, it can resist external friction and extend the life of building structures.
Optimize compression and impact resistance
Its high toughness can improve the compressive strength of materials and is suitable for mortar fillers in heavy-loaded scenes such as bridges and roads.
2. Improve thermal stability and chemical stability
High temperature stability
White aluminum oxide has stable performance at high temperatures and is suitable for the manufacture of refractory materials (such as refractory bricks, castables) and high-temperature ceramics.
Chemical corrosion resistance
Its chemical properties are stable and can resist acid and alkali corrosion.
For example:
Improve the anti-corrosion performance in ship coatings and chemical equipment coatings;
Protect the substrate from corrosive environments such as sewage treatment facilities in mortar.
3. Optimize the overall performance of the product
Surface performance improvement
Fill the micropores of the coating to improve the surface flatness and glossiness;
As a ceramic glaze additive, improve the glaze quality and decorative effect.
Compactness and strength improvement
As a ceramic or refractory filler, it can reduce the porosity and enhance the density and overall strength of the material.
Adhesion enhancement
In the coating, the microparticles are combined with the substrate to prevent the coating from peeling and improve the durability.
4. Process performance optimization
Construction performance improvement
Adding white aluminum oxide powder to the mortar can improve workability, facilitate mixing and laying, and reduce porosity.
Processing performance optimization
Improve the material fluidity and reduce the difficulty of production during the ceramic molding process.
5. Other functional applications
Electronic industry
As a semiconductor polishing medium, it improves the surface accuracy of the device; used in electronic products such as conductive films and packaging materials.
Refractory materials
As a raw material for lightweight bricks, hollow balls, etc., it has both high temperature resistance and thermal insulation properties.