China Si Al Slug Suppliers, Factory

Si Al Slug is a type of pre-formed high-purity aluminum-silicon alloy (Al-Si) granular material, with purity levels reaching 99.99% to 99.999%. It is supplied in a fixed geometric shape, facilitating precise feeding and control during the melting process, making it a crucial raw material in precision alloy preparation, coating, and electronic packaging.

Product Description

Electronic Packaging and Thermal Management Materials

Core Application:

As a raw material for high-silicon aluminum alloys (such as Si content of more than 30%), it is used to prepare electronic packaging substrates, CPU heat dissipation covers, and power module substrates.

Performance Advantages:

Low CTE matching silicon chip to avoid thermal cycle failure; High thermal conductivity and rapid heat export; Lightweight (only 1/3 the density of copper) for aerospace electronics systems.

Process Support:

Molding by powder metallurgy or vacuum hot pressing to ensure low porosity and high density.

Surface Engineering and Functional Coatings

Core Application:

High-purity Si Al Slug (4N~6N grade) sputtering target for optical and semiconductor coating.

Typical Products:

SiO₂/Si₃N₄ film: used in LOW-E energy-saving glass, AR transparency-enhancing optical devices; Semiconductor barrier layer: used as a diffusion barrier layer for copper interconnects in wafer fabrication; Display panel: TFT-LCD electrode and touch screen conductive layer.

Process Requirements:

The target should meet the purity > 99.9%, the oxygen content ≤ 6000 ppm, and the density ≥ 2.2 g/cm³.

Wear-resistant Alloys and Structural Materials

Core Application:

Added to cast aluminum-silicon melt as a master alloy to improve the wear resistance of mechanical components.

Typical Parts:

Automotive pistons, brake discs, gearboxes (gravity casting process).

Scientific Research & Emerging Fields

Nuclear Radiation Shielding:

High-density aluminum-silicon alloy replaces lead-based materials, which is environmentally friendly and corrosion-resistant.

3D Printing Raw Materials:

Pre-alloyed powders are used for laser selective melting (SLM) to manufacture complex heat sinks.

Refractory Innovation:

Silicon-aluminum slag synthetic refractory aggregate for nuclear power plant protection structures.

Frequently Asked Questions

How is Si Al Slug applied in thermal management?

It serves as a primary raw material for high-silicon aluminum alloys (containing over 30% Si) to manufacture electronic packaging substrates, CPU heat dissipation covers, and power module substrates.

What are the performance advantages of Si Al Slug for electronic systems?

It offers a low CTE matching silicon chips to prevent thermal cycle failure, high thermal conductivity for rapid heat dissipation, and a lightweight composition (only 1/3 the density of copper) optimized for aerospace electronics.

What requirements must Si Al Slug meet for sputtering targets?

For sputtering targets in optical and semiconductor coatings, high-purity Si Al Slug (4N~6N grade) must maintain a purity level greater than 99.9%, oxygen content less than or equal to 6000 ppm, and density greater than or equal to 2.2 g/cm³.

How does Si Al Slug improve wear resistance in structural alloys?

It is introduced into cast aluminum-silicon melts as a master alloy, which increases the wear resistance of critical mechanical components such as automotive pistons, brake discs, and gearboxes.

What role does this material play in nuclear and 3D printing industries?

It replaces hazardous lead-based materials for corrosion-resistant nuclear radiation shielding, acts as pre-alloyed powder for laser selective melting (SLM) 3D printing of complex heat sinks, and serves as a synthetic aggregate for nuclear protection structures.

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