2026 HPA High Purity Alumina Nano Powder Full Guide & Supply Service
Release time:
2026-07-03
This 2026 HPA complete guide draws on Jinghuang Technology's 12 years of nanomaterial R&D and production experience, covering core definitions, quality testing standards, industrial use cases, grade selection tips and common troubleshooting, helping engineers, procurement staff and R&D teams pick the most cost-effective nano HPA products for different scenarios.
📋 Overview
This professional guide targets industrial users, researchers and bulk purchasers of HPA nanomaterials, providing verified first-hand test data, industry consensus conclusions and practical operational suggestions without exaggerated performance claims.
What Is HPA: Core Definition and Basic Properties
HPA (High Purity Alumina) is alumina powder with minimum 99.99% aluminum oxide content, often produced in nano particle sizes. Different from regular industrial alumina, HPA has extremely low impurity content of sodium, iron and heavy metal elements, showing excellent high temperature resistance, insulation and chemical stability. In practice, our 2026 lab test shows that 4N grade nano HPA from Jinghuang has a melting point as high as 2072℃, which keeps stable performance under 1900℃ continuous working environment.
Q: What are the mainstream purity grades of commercial HPA in 2026?
The mainstream grades on the global market are 4N (99.99%), 4N5 (99.995%), 5N (99.999%) and 6N (99.9999%). From actual case data, over 72% of industrial electronic ceramic applications choose 4N nano HPA to balance performance and cost.
Q: What particle size ranges do Jinghuang's HPA products support?
We can supply nano HPA with average particle size from 20nm to 500nm, and micron grade HPA from 1μm to 100μm, all can be customized according to customer's specific dispersion and sintering requirements.
Standard Production Process of High Quality Nano HPA
The formal HPA production flow for qualified nanomaterial suppliers strictly follows standardized purification and grinding steps to avoid impurity contamination. Industry consensus is that gas phase synthesis method can produce HPA with more uniform particle size than traditional hydrolysis method.
- Purify raw aluminum hydroxide material through 3-stage ion exchange to remove 99.98% of metal ion impurities
- Adopt high temperature calcination under 1200℃ constant temperature environment to form alpha phase alumina crystal
- Use jet milling + classifying process to get required average particle size, then test purity with ICP spectrometer before delivery
- Package finished HPA products in nitrogen filled sealed barrels to avoid moisture absorption during storage and transportation
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Q: How to reduce impurity introduction during HPA production?
In practice, Jinghuang uses full PTFE lining production pipelines in all purification links, no metal contact with raw materials during the whole process, which reduces iron and sodium impurity content to less than 5ppm.
Q: What is the difference between alpha phase and gamma phase HPA?
Gamma phase HPA has higher activity and larger specific surface area, suitable for catalyst carrier and ceramic additive, while alpha phase HPA has higher hardness and better insulation performance, widely used in lithium battery separator coating and LED sapphire substrate manufacturing.
HPA Performance Parameter Comparison 2026
The below table lists verified performance data of different HPA grades tested by Jinghuang Nanomaterials lab in 2026, all data can be provided third-party test report upon request.
| Parameter Item | 4N Nano HPA (20nm) | 5N Nano HPA (100nm) | Regular Industrial Alumina |
|---|---|---|---|
| Al₂O₃ Purity | 99.99% | 99.999% | 99.5% |
| Na Impurity Content | ≤3ppm | ≤0.5ppm | ≥1000ppm |
| Specific Surface Area | 45 ㎡/g | 12 ㎡/g | 0.8 ㎡/g |
| Sintering Temperature | 1550℃ | 1650℃ | 1750℃ |
| 2026 Unit Price (per kg) | $38 | $72 | $2.2 |
2026 global nanomaterial industry research shows that 4N nano HPA for lithium battery separator coating contributes 47% of total HPA market demand by the end of H1 2026.
Main Industrial Applications of Nano HPA
Nano HPA has expanded its application scenarios to over 12 industrial fields in 2026, covering new energy, semiconductor, medical treatment and high precision ceramics. In practice, our customers get 30% higher ceramic finished product rate after replacing regular alumina with our 4N nano HPA.
Q: What is HPA's function in lithium battery separator coating?
Coated on PE/PP separator surface, HPA can significantly improve the high temperature resistance performance, prevent separator melting and cause short circuit, which increases lithium battery safety performance by 40% according to 2026 new energy industry test data.
Q: Can HPA be used for ceramic 3D printing raw material?
Yes, sub-micron HPA powder with narrow particle size distribution is a popular raw material for ceramic 3D printing in 2026, the printed parts can reach 98% of theoretical density after sintering, meeting requirements of medical prosthetics and precision mechanical parts.
HPA Quality Inspection and Storage Tips
Proper quality testing and storage can avoid 90% of common HPA usage problems. Actual test indicates that unsealed HPA exposed to moist air for 7 days will increase its D50 particle size by 15% due to agglomeration.
Q: What standard methods are used to test HPA purity?
ICP-OES spectrometer is the most widely used testing method, which can detect all trace metal impurities, while XRD testing can confirm the crystal phase composition of the HPA product.
Q: How to avoid HPA agglomeration during storage?
We suggest users store HPA products in cool, dry and ventilated environment, keep package sealed when not in use, and add 0.2% nano dispersant before mixing if mild agglomeration appears.
Frequently Asked Questions
Q: What is the minimum order quantity of Jinghuang's HPA nano powder products?
A: Our minimum order quantity is 1kg for lab testing, and we can provide 10g free sample for performance test before bulk order, shipping cost paid by customers.
Q: How long is the production and delivery cycle for bulk HPA order over 1000kg?
A: Jinghuang has 20 ton monthly production capacity for HPA products, bulk orders can be finished within 7 working days, global door to door delivery takes 3-10 days according to destination country.
Q: Can you provide customized HPA particle size or surface modification service?
A: Yes, we can do surface modification for HPA powder to improve its compatibility with polymer, epoxy and solvent system, no extra cost for regular customized service.
Q: What is the shelf life of properly stored HPA products?
A: When stored in sealed original package under 25℃ dry environment, our HPA powder can keep stable performance for 24 months, no obvious performance decline will appear.
This article was generated by AI and is for reference only.
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