Calcium Silicon (CaSi) Powder is a premium composite alloy powder mainly composed of silicon (Si) and calcium (Ca), with a certain content of iron (Fe) and trace impurities like aluminum (Al), carbon (C), sulfur (S), and phosphorus (P). Featuring a silver-gray or off-white appearance with metallic luster, it is available in lump, powder, or particle forms, with customizable sizes including 0.2~2mm, 1-6mm, 10~50mm, 10~100mm, and more. Packaged in ton bags or as per customer requirements, it meets diverse industrial needs.

Key Properties

Boasting strong reducibility, the silicon and calcium elements in CaSi Powder react efficiently with oxygen, sulfur, and other elements at high temperatures. Silicon forms stable silicon dioxide due to its strong oxygen affinity, while calcium combines with oxygen and sulfur to produce calcium oxide and calcium sulfide respectively. This unique property makes it indispensable in multiple industrial fields.

Calcium silicon CaSi powder

chemical composition

Brand	Chemical Composition %
	Ca	Si	C	Al	P	S
	≥	≥	≤
Ca31Si60	31	55-65	1.0	2.4	0.04	0.06
Ca28Si60	28	55-65	1.0	2.4	0.04	0.06
Ca24Si60	24	55-65	1.0	2.5	0.04	0.04
Ca20Si55	20	50-60	1.0	2.5	0.04	0.04
Ca16Si55	16	50-60	1.0	2.5	0.04	0.04

Core Applications

Steel Smelting:

Ideal deoxidizer and desulfurizer, reducing oxygen/sulfur content and oxide inclusions to enhance steel purity and hot working performance. Acts as an inclusion modifier, converting harmful inclusions into spherical shapes for better mechanical properties.

Foundry Industry:

Inoculant for cast iron to promote graphitization, refine graphite structure, and improve strength, hardness, and toughness. Partial spheroidizing agent for ductile iron, ensuring full graphite spheroidization.

Metallurgical Industry:

Reducing agent for rare metal extraction; alloy additive to adjust compositions and endow alloys with specific properties.

Refractory Manufacturing:

Enhances high-temperature strength, corrosion resistance, and thermal shock stability of refractories, extending service life in high-temperature equipment.

Chemical & Electronic Industries:

Raw material/additive for silicon/calcium compound production; auxiliary material for electronic packaging and semiconductor materials, improving conductivity and thermal stability.

As a trusted manufacturer and supplier, we provide high-purity CaSi Powder with consistent quality. Customized specifications are available to meet your specific industrial requirements. Contact us for quotes and technical support!

Calcium silicon CaSi powder