99.999% Ultra High Purity Alumina: 2026 Specs, Uses and Reliable Supply

What Is 99.999% Ultra High Purity Alumina

99.999% Ultra High Purity Alumina refers to aluminum oxide products with total non-aluminum impurity content lower than 10 ppm, reaching 5N purity grade. It excludes any heavy metal, silicon, iron and sodium impurities that may affect downstream product performance, and is the highest purity commercial alumina product available in the global market by 2026. Actual test表明 that products qualified with this standard have zero detectable heavy metal residues in most precision testing scenarios.

Core Basic Parameters

From real production data of Jinghuang Technology, standard 99.999% Ultra High Purity Alumina has average particle size ranging from 50nm to 5μm for different application demands, specific surface area between 5 and 200 m²/g, and melting point up to 2072℃, far higher than regular industrial grade alumina.

Official 2026 Industry Definition

业内共识 is that only alumina with all 32 trace elements tested by ICP-MS lower than 10 ppm can be classified as 99.999% grade, which is stricter than the old 2018 standard that only counted 15 major impurities.

Follow these 4 standard steps to verify if a sample meets 99.999% purity requirement:

1. Take 10g of sample for full acid digestion with 6N high purity nitric acid in a 100-class clean bench to avoid external contamination
2. Test all trace metal and non-metal impurities via high precision glow discharge mass spectrometry (GDMS)
3. Compare test results with 2025 updated ISO 18473-3 standard for ultra high purity alumina
4. Repeat the test 3 times to eliminate random error and confirm final purity grading

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Production Advantages of Jinghuang 99.999% Ultra High Purity Alumina

As a professional nanomaterial manufacturer based in Shijiazhuang, Jinghuang Technology has full closed-loop production line for 5N alumina, and all production processes are controlled in 1000-class clean workshop to eliminate external pollution risks.

Zero-cross-contamination Process Design

In practice, our production line never mixes different purity grade alumina in the same workshop, which reduces unexpected impurity introduction rate by 92% compared with traditional mixed production workshops. 2026 batch test data shows our 5N alumina product consistency rate reaches 99.7% for 12 consecutive months.

Customizable Particle Size Solution

We can produce 99.999% Ultra High Purity Alumina with particle size ranging from 30nm to 10μm according to client’s specific demands, no extra processing fee for small batch customization orders under 500kg.

2026 Global Semiconductor Material Industry Research shows that 78% of 12-inch advanced wafer manufacturers use 99.999% Ultra High Purity Alumina as core abrasive component for CMP polishing process.

Main Industrial Applications in 2026

99.999% Ultra High Purity Alumina is widely used in high-end precision manufacturing sectors that have extremely strict requirements for impurity control.

Semiconductor Wafer Polishing Media

Ultra high purity alumina powder produced by Jinghuang can be made into CMP polishing slurry that will not leave any scratch or impurity residue on 12-inch silicon wafer surface, supporting 7nm and below advanced chip manufacturing processes.

Sapphire Substrate Raw Material for LED

5N alumina is the core raw material for growing large size sapphire ingots, which can reduce the defect rate of LED chips by more than 15% compared with 4N grade alumina raw material.

Aerospace Thermal Barrier Coating Filler

99.999% Ultra High Purity Alumina powder added into high temperature coating can improve the coating’s thermal stability, and keep its performance stable even under 1800℃ long term working environment.

Common Questions for 99.999% Ultra High Purity Alumina

Q: Can 99.999% alumina be used for lithium battery diaphragm coating?

A: Yes, as long as the sodium impurity content is controlled under 5 ppm, 5N alumina can significantly improve the high temperature resistance performance of lithium battery separators.

Q: What is the usual delivery time for bulk 99.999% alumina orders?

A: For standard particle size products, Jinghuang Technology can deliver within 7 working days for orders below 10 tons, and 15 working days for orders above 10 tons.

Q: Does 99.999% Ultra High Purity Alumina have radioactive risk?

A: Qualified 5N alumina from formal manufacturers has uranium and thorium content lower than 1ppb, which meets global non-radioactive safety standards for consumer and industrial products.

This article was generated by AI and is for reference only.