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Spherical Alumina Powder for High-Frequency Circuit Substrates

This high-purity electronic-grade spherical alumina powder is specially designed for high-frequency circuit substrates (e.g., 5G communications, millimeter-wave radar, RF devices). It features low dielectric loss, high thermal conductivity, and excellent high-frequency stability. Produced via high-precision spheroidization technology, it exhibits uniform particle morphology and tightly controlled size distribution, significantly enhancing signal transmission efficiency and thermal management in high-frequency substrates.

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Product Description

 Product Description: 
 
This high-purity electronic-grade spherical alumina powder is specially designed for high-frequency circuit substrates (e.g., 5G communications, millimeter-wave radar, RF devices). It features low dielectric loss, high thermal conductivity, and excellent high-frequency stability. Produced via high-precision spheroidization technology, it exhibits uniform particle morphology and tightly controlled size distribution, significantly enhancing signal transmission efficiency and thermal management in high-frequency substrates. 

 Key Advantages 

High-Frequency Compatibility
Ultra-low dielectric loss (tanδ ≤ 0.0005), minimizing signal attenuation
Stable dielectric properties (ε < 9.8 @ 10GHz), ensuring signal integrity
Superior Thermal Performance
Thermal conductivity ≥30 W/(m·K), effectively reducing heat buildup
High packing density design improves substrate heat dissipation
Precision Manufacturing
Sphericity ≥ 95%, reducing porosity and optimizing flow properties
Adjustable particle size (2-50μm) for diverse substrate processing needs
Rigorous Quality Standards
Purity ≥ 99.5%, heavy metal content ≤10ppm
Compliant with ROHS & ISO 9001, meeting electronic-grade material requirements

Typical Applications
5G Communications
High-frequency PCB fillers, antenna substrates, RF module packaging
Automotive Electronics
Millimeter-wave radar substrates, vehicle-mounted high-frequency sensors
Premium Consumer Electronics
Smartphone AiP antennas, Wi-Fi 6/7 modules
Aerospace
Satellite communication devices, high-reliability electronic systems

Why Choose Us?
Custom Solutions: Tailored particle sizes & surface treatments (e.g., silane coupling)
 Technical Support: Formula optimization for high-frequency substrates
 Stable Supply: 200-ton monthly capacity with batch-to-batch consistency

Packaging & Shipping
Standard: 25kg/bag (customizable)
Shipping: Moisture-proof & shock-resistant packaging, global logistics support

Inquiry Tip: Contact us for free samples or Technical Data Sheet (TDS)!

Project	Related indicators	Explain
Purity	A1.03	More than 99%
Impurities	Na,0	Can be as low as below 300ppm
Appearance	0-A1z03 content	Up to 90% or more
Particle Size Distribution	D50	Optional within 2um-50um
	Di₀0	Can be as low as 10um or less
	Particle size distribution	Adjustments can be made based on the typical distribution according to the requirements of the palace household, including multi-modal distribution and narrow distribution

Project	Unit	Typical values
Appearance	/	White pink wood
Particle Shaped Ni	/	Spherical
Density	kg/m³	3.7×103
Mohs Hardness	/	6-9
Dielectric Constant	Er	9
Dielectric Loss	lgδ	0.0003
Linear expansion coefficient	1/K	0.7x10-6
Thermal conductivity	W/Kam	30