White Alumina Powder: A High-Purity Material for Advanced Industrial Applications

White alumina powder, also known as white fused alumina powder, is a premium-grade industrial material made from pure aluminum oxide. Its excellent hardness, chemical stability, and thermal resistance make it widely used in abrasives, refractories, ceramics, and precision industries.

As global demand grows for high-performance raw materials, white alumina powder continues to be the first choice for manufacturers in sectors such as electronics, aerospace, metal finishing, and advanced ceramics.

What Is White Alumina Powder?

White alumina powder is produced by melting high-purity aluminum oxide (Al₂O₃ content above 99%) in an electric arc furnace at extremely high temperatures. The molten material is then cooled, crushed, ground, and graded into fine particles or powder.

This manufacturing process results in a product with high purity, sharp crystal structure, and a bright white appearance. Unlike natural abrasives or lower-grade alumina, white alumina powder contains very low levels of impurities such as iron, silica, or titanium.

Key Features of White Alumina Powder

One of the most notable features of white alumina powder is its extreme hardness. With a Mohs hardness of 9, it is nearly as hard as diamond, making it ideal for high-precision grinding and polishing.

In addition to its hardness, white alumina powder is chemically inert and can resist corrosion from acids and alkalis. It also has excellent thermal stability, maintaining its structure and performance at temperatures above 2000°C. Because of its low magnetic content and minimal contamination risk, it is also widely used in the electronics and semiconductor industries.

Applications of White Alumina Powder

White alumina powder is a highly versatile material, used across multiple industries. In abrasive applications, it is commonly used for grinding wheels, sandpaper, and polishing compounds. It is especially suitable for working with high-alloy steels, stainless steel, ceramics, and non-ferrous metals.

In the refractory industry, white alumina powder serves as a key raw material in high-alumina bricks, castables, and insulating refractories for kilns, furnaces, and incinerators.

In precision casting, white alumina powder is used to manufacture molds that require fine surface finishes and dimensional stability. Its high purity prevents unwanted reactions during the casting process, especially in aerospace and automotive applications.

In the field of advanced ceramics, white alumina powder is used as an additive or base material for wear-resistant components, insulators, and substrates. It is also used in the production of spark plugs, seals, and technical ceramics.

Additionally, white alumina powder is widely used in electronics as a polishing agent for silicon wafers, LCD glass, and hard disk substrates. Its non-conductive and non-magnetic nature makes it safe for use in cleanroom and high-precision environments.

Particle Sizes and Customization

White alumina powder is available in a wide range of particle sizes, from coarse grits to ultra-fine micro powders. Coarse grades are used in blasting and heavy grinding, while finer grades are used in polishing, lapping, and precision finishing.

Depending on customer requirements, different grading standards such as FEPA, JIS, or custom sieving can be provided. At Henan Yumo New Materials, we offer flexible customization options to meet the unique needs of various industries.

Why Choose Henan Yumo New Materials?

Henan Yumo New Materials is a trusted Chinese manufacturer of high-purity white alumina powder. With over 10 years of experience in the abrasives and refractory industry, we focus on consistent quality, fast delivery, and professional technical support.

All of our white alumina products are manufactured in-house, ensuring full control over raw materials, processing, and quality inspection. We supply customers across Japan, Korea, India, the Middle East, and Europe.

Whether you need standard grades or custom solutions, our team can provide detailed technical specifications, MSDS reports, and free samples for evaluation.

Get in Touch

If you are looking for a reliable supplier of white alumina powder, contact Henan Yumo New Materials today. We provide competitive factory prices, fast global shipping, and responsive service for customers worldwide.

Visit our official website at www.yumorabrasive.com or send an inquiry to sales1@yumoabrasive.com. Free samples are available for testing upon request.

White alumina powder is more than just an abrasive — it is a critical material that drives performance and reliability in modern industries. Choosing the right supplier is the first step toward stable production, better quality, and long-term business success.