Calcined Aluminas for Grinding & Polishing

Our calcined alumina for grinding and polishing is a high-performance functional powder for grinding and polishing, made from high-purity industrial alumina through precise temperature-controlled calcination, crystal form regulation, ultra-fine grinding, and precise classification. The product is a white crystalline powder with core advantages such as high purity, concentrated particle size distribution, high hardness, and good dimensional stability. Through process control, it can achieve full particle size coverage from coarse grinding to mirror polishing, making it an indispensable core abrasive in the high-end surface treatment field.

Relying on large-scale production in professional kilns, our products strictly control chemical indicators: Al₂O₃ purity is consistently ≥99.7%, harmful impurities such as Na₂O, SiO₂, and Fe₂O₃ are all ≤0.05%, and α-Al₂O₃ content can reach up to 97%, ensuring stable abrasive performance from the source. Meanwhile, we can customize the particle size according to customer needs, covering a full range of specifications from 20-45μm (coarse polishing), 4-20μm (medium polishing), 1-4μm (fine polishing), and below 1μm (mirror polishing). Physical indicators such as specific surface area and D50 particle size are precisely controllable, adapting to the differentiated needs of different polishing processes, and ensuring that each batch of products has consistent performance and is traceable.

Calcined alumina for grinding and polishing, with its excellent grinding performance and chemical stability, is widely used in various industries requiring surface treatment, covering the entire processing needs from rough grinding to mirror polishing:

1. Tableware and Jewelry Industry

Used for fine polishing of stainless steel tableware, hardware jewelry, and precious metal jewelry. It can quickly remove processing marks, achieving a uniform, bright, high-gloss surface, enhancing product texture and aesthetics.

2. Automotive and Machinery Parts Industry

Suitable for grinding and fine polishing of automotive parts, mechanical and electrical components, molds, and other workpieces. It effectively improves surface flatness and smoothness, while enhancing the wear resistance and corrosion resistance of the workpieces.

3. Optics and Electronics Industry

Used for precision polishing of optical lenses, glass covers, semiconductor devices, and electronic ceramic substrates. It enables scratch-free and damage-free ultra-precision machining, ensuring the light transmittance of optical components and the surface accuracy of electronic components.

4.Other high-end surface treatment fields

It can be used for surface polishing and repair of stone, artificial stone and ceramic products. It is also compatible with the production of polishing liquid, grinding paste, sandpaper and abrasive cloth and other abrasive tools, and is compatible with various processes such as mechanical polishing and manual fine polishing.

1. Precise Particle Size Grading, Strong Adaptability to All Processes.

The product has a narrow particle size distribution and high controllability, allowing for precise matching to different polishing processes based on the average particle size: 20-45μm for rough polishing, 4-20μm for medium polishing, 1-4μm for fine polishing, and below 1μm for mirror polishing. The entire process is free of large particles and sharp edges, leaving no scratches or pitting after polishing, meeting the needs of the entire process from rough machining to ultra-precision machining.

2. High purity and low impurities, no workpiece contamination, and strong chemical stability.

The product boasts high Al₂O₃ purity with extremely low levels of harmful impurities. Its chemically stable properties prevent corrosion of metals and contamination of glass and precision components. It is suitable for processing various materials such as stainless steel, alloys, optical glass, and ceramics, ensuring that workpiece purity and performance remain unaffected.

3. Stable crystal structure and high consistency in size and performance.

The product exhibits complete α-phase transformation, a stable crystal structure, and excellent dimensional stability. Batch-to-batch performance variations are minimal, meeting the quality requirements of large-scale continuous production. This avoids unstable polishing effects caused by fluctuations in abrasive performance, thus improving yield.

4. Strong customization capabilities and high cost-effectiveness through direct sourcing.

We can customize indicators such as particle size, specific surface area, and α phase content according to customer process requirements, adapting to various scenarios such as automated polishing equipment, manual polishing, and abrasive manufacturing. As a self-producing and self-selling source manufacturer, we leverage the advantages of the entire industrial chain, eliminating intermediate links, ensuring high quality while providing highly competitive and satisfactory prices, suitable for bulk purchases and long-term cooperation. We also provide professional technical support, offering customers a one-stop abrasive solution.