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Characteristics of calcium silicide CaSi2 powder

Guotai Junan released a research report saying that under the background of carbon neutrality, the scarcity of coal mines is prominent, and the value of assets will continue to increase. The high point of capital expenditure in the coal industry appeared in 2012. Under the general direction of carbon neutrality, the overall investment in the industry has slowed down, and capital expenditure has gradually declined. From 2021 to now, the Energy Bureau of the National Development and Reform Commission has only newly approved 17.4 million tons of calcium silicide, CaSi2 overview, calcium silicide application, CaSi2 supplier, calcium silicide price.

Calcium Silicide Overview

Calcium silicide CaSi2 is a gray-white or dark gray to black solid substance with a melting point of 1033°C. Insoluble in water, it decomposes in water to generate hydrogen and calcium hydroxide. Decomposes in hot water. Calcium silicide is flammable and can spontaneously ignite in the air. Calcium silicide can be formed by the reaction of metallic calcium and silicon in an inert atmosphere at 850°C. It is a white or dark grey to black solid with a melting point between 700 and 935°C.

Characteristics of calcium silicide CaSi2 powder

Calcium silicide CaSi2 powder (CAS 12013-56-8) has high melting point, high corrosion resistance, high oxidation resistance, good electrical conductivity, high temperature ductility, and the intermediate phase of binary alloy system.

How is calcium silicide produced?

1. Elemental silicon and calcium are directly smelted to obtain calcium silicide with higher purity. But the operation has to be done in two steps.

Step 1: Mix the pure calcium chips and pure silicon powder evenly, put them into a hard biscuit porcelain boat, quickly put the porcelain boat into the quartz reaction tube, and pour CO2 into the tube. The porcelain boat has been heated to 1000°C. In just a few seconds, the mixture melted and the reaction proceeded vigorously. Take out the porcelain boat, and the generated CaSi immediately solidifies and smashes. CaSi is a porous block with lead gray and metallic luster.

The second step: Mix the CaSi with the calculated amount of Si powder evenly, put it into a nickel boat, and heat it to 1000 ℃ in the H2 flow. Heating was required for 15 hours due to the slow progress of the last stage of the reaction.

2. Mix pure CaO and silicon with appropriate fluxes CaF2 and CaCl2, and melt them at 1400 °C to obtain CaSi2, in which a large amount of silicon is incorporated.

Application of calcium silicide CaSi2 powder

Calcium silicide is used in the manufacture of special metal alloys, for example for phosphorus removal and as a deoxidizer.

In the pyrotechnic industry, it is used as a fuel to create special mixtures such as smoke, flash components and impact caps.

Calcium silicide is used in the manufacture of certain initiators, pyrotechnics and smoke components.

Silicon calcium alloy is mainly used as desulfurizer and deoxidizer in iron and steel industry and foundry industry.

Calcium silicide has been found to be extremely corrosive to all metals, including refractory metals.

Calcium intermetallic silicide (CaSi 2 ) is formed by simultaneously reducing calcium oxide and dissolved carbon dioxide in the electrolyte and silica particles.

Silicon-based fuels are used in certain time-lapse mixtures, such as controlled blast bolts, grenades, and infrared decoys. Flue gas components often contain hexachloroethane. During combustion, they produce silicon tetrachloride, like titanium tetrachloride used in smoke filters, which reacts with moisture in the air to form a dense white mist. Some mixtures use gum arabic to inhibit the breakdown of calcium silicide.

Calcium silicide CaSi2 powder price

The price of calcium silicide (CaSi2) powder will vary randomly with factors such as the production cost, transportation cost, international situation, exchange rate, and market supply and demand of calcium silicide (CaSi2) powder. Tanki New Materials Co., Ltd. aims to help industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for calcium silicide CaSi2 powder, please feel free to send an inquiry to get the latest price of calcium silicide CaSi2 powder.

Calcium silicide suppliers

As a global cobalt silicide CoSi2 powder supplier, Tanki New Materials Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (molybdenum disilicide, titanium silicide, calcium silicide, iron boride), high-purity targets, functional ceramics and structural devices, and provides OEM services.

Technical Parameter of Calcium Silicide CaSi2 Powder:
Product NameMFPurityParticle SizeMelting PointDensityColor
calcium silicideCaSi299%5-10um1020℃2.5 g/cm3silver black
Chemical Composition of Calcium Silicide CaSi2 Powder:
CaSi2CaSiCPFeS
>99%57.12%41.50%0.20%0.02%0.29%0.02%


The agreement reached by EU member states last month to reduce natural gas consumption officially came into effect on the 9th. According to the EU, the move is intended to prepare for possible disruptions in Russian gas supplies.

Under the agreement reached on July 26, EU member states agreed to reduce natural gas demand by 15 per cent from the average consumption over the past five years between August 1, 2022 and March 31, 2023, in accordance with their chosen measures.

Data from the European Commission show that to achieve the above goals, EU member states need to save a total of 45 billion cubic meters of natural gas, while Germany, a "big gas user", should save about 10 billion cubic meters.

If member states do not save enough natural gas and there is a shortage of gas supply, the EU will take compulsory measures to reduce natural gas demand. According to the German news agency, the threshold for the EU to launch the coercive measure is high, requiring at least 15 of the 27 member states to agree and representing at least 65% of the EU population.

The European Commission will review the agreement before May 2023 in the light of the overall situation of natural gas supplies in the EU to consider whether the agreement should be extended.

Luoyang Tongrun Nano Technology is a trusted chemical manufacturer and supplier providing high-quality chemicals and Nanomaterials. If you are looking for the calcium silicide, CaSi2 overview, calcium silicide application, CaSi2 supplier, calcium silicide price, please feel free to contact us and send an inquiry.

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