Description

90% Welding Flux Boron Powder Amorphous B Boron Used in Metallurgy

90% amorphous boron powder is a high-purity and high-activity functional material specially developed for metallurgical smelting and welding flux applications. With 90% effective boron content and strictly controlled residual impurities, this amorphous boron features a disordered atomic structure, providing abundant surface active points and higher chemical reactivity than conventional crystalline boron. It serves as a reliable deoxidizer, denitrifier and flux additive, widely applied in steel smelting, alloy modification and precision welding industries.

In metallurgical production, this amorphous boron powder plays a vital role in purifying molten metal and optimizing alloy microstructure. Under high-temperature smelting conditions, it can quickly react with residual oxygen and nitrogen in molten steel, effectively removing oxide and nitride inclusions. It significantly improves the compactness, uniformity and overall stability of metal materials. Trace boron modification effectively enhances the hardness, wear resistance, high-temperature toughness and corrosion resistance of special steel and alloy products, reducing production defects and improving finished product quality.

As a key raw material for welding and brazing flux, 90% amorphous boron powder greatly optimizes welding performance and process stability. It can thoroughly remove stubborn oxide films on the surface of carbon steel, stainless steel and various alloy workpieces. It effectively improves the fluidity and wetting ability of solder, promotes uniform fusion of welding materials, and avoids common welding defects such as pores, cracks and incomplete bonding, greatly improving welding firmness and surface finish.

Compared with crystalline boron and low-grade boron powder, this product features moderate and stable high-temperature activity, no excessive combustion loss during processing, and lasting auxiliary effect. With uniform particle size and good dispersion, it can be evenly mixed with various flux and metallurgical additives without agglomeration. It has stable chemical properties at room temperature, convenient for storage, transportation and industrial batch use. Cost-effective and highly practical, it is the preferred functional additive for modern metallurgy and welding manufacturing.

Product Features

Based on the specific gravity of boron, it is divided into amorphous boron and crystalline boron. Amorphous boron has a specific gravity below 1.73 g/cm³.
The widely used amorphous boron is formed by reduction at around 1000℃, of which 60% is α-rhombic crystalline boron,And 40% is amorphous boron, a mixture of crystalline and amorphous.
Due to its small particle size and uniform distribution, amorphous boron has high activity.

AVERAGE CHEMICAL COMPOSITION(TYPICAL)

ITEM	B90	B95	B99	B99.9
B	90-95	95-99	99-99.9	99.9MIN
O	3.0 MAX	2.5MAX	1.0MAX	0.01MAX
MG	5.0 MAX	2.0MAX	0.1MAX	0.01MAX

Available size:

Micrometer level	D50:3 micrometers
Nanometer level	600-700 nanometers.

Applications:

1. Amorphous boron powder with a boron content of 95-99% possesses high mass heat and volumetric heat, resulting in a large specific impulse. It is a high-quality material for rocket propellants and explosives.

2. Boron powder with a boron content of over 99% is an electronic material that acts as a deoxidizer, antioxidant, and catalyst.It plays a crucial role in semiconductor manufacturing, influencing the conductivity and crystal structure of semiconductors, thereby affecting the performance and reliability of components. It is widely used in high-end products requiring high boron purity, such as electronic materials and semiconductor diffusion.

3. Amorphous boron powder with a purity of 99.9% is used in the production of solar silicon wafers as a substrate dopant for P-type silicon wafers and for boron emitter diffusion in N-type silicon wafers.

4. High-purity boron powders of 5N and 6N can be used as dopants in P-type semiconductors to alter their conductivity, enabling the production of high-purity silicon wafers.

Packaging:

Vacuum foil bags + drums + pallets