Characteristics of calcium silicide CaSi2 powder
Calcium silicide CaSi2 powder (CAS 12013-56-8) has a high melting point, high corrosion resistance, high oxidation resistance, good electrical conductivity, high temperature ductility, and the intermediate phase of a binary alloy system.
How is calcium silicide CaSi2 powder produced?
1. Higher purity calcium silicide can be obtained by directly melting elemental silicon and calcium. But this operation must be carried out in two steps.
The first step: mix pure calcium shavings and pure silicon powder uniformly, put them in a hard biscuit porcelain boat, quickly put the porcelain boat into the quartz reaction tube, and pour carbon dioxide into the tube. The porcelain boat has been heated to 1000°C. In just a few seconds, the mixture melted and the reaction proceeded violently. Take out the porcelain boat and immediately condense and crush the CaSi produced. CaSi is a porous block with lead gray and metallic luster.
The second step: evenly mix the CaSi with the calculated amount of Si powder, put it in a nickel boat, and heat it at 1000°C in a H2 gas stream. Since the final stage of the reaction proceeds slowly, heating for 15 hours is required.
2. Mix pure CaO and silicon with appropriate fluxes CaF2 and CaCl2, and melt them at 1400°C to prepare CaSi2, and mix with a large amount of silicon.
Overview of calcium silicide CaSi2 powder
Calcium silicide CaSi2 is an off-white or dark gray to black solid substance with a melting point of 1033°C. It is insoluble in water, but decomposes when it meets water, producing hydrogen and calcium hydroxide. Decomposes in hot water. Calcium silicide is flammable and may ignite spontaneously in the air. Calcium silicide can be formed by reacting Ca metal and Si in an inert atmosphere at 850°C. It is a white or dark gray to black solid with a melting point between 700 and 935°C.
Application of calcium silicide CaSi2 powder
Various uses of calcium silicide. Some of these include:
Calcium silicide is used to make special metal alloys, for example for phosphorus removal and as a deoxidizer.
In the pyrotechnic industry, it is used as a fuel to make special mixtures, such as smoke, flash components and impact caps.
Calcium silicide is used to make certain initiators, pyrotechnics and smoke components.
Silicon and calcium alloys are mainly used as desulfurizers and deoxidizers in the steel industry and foundry industry.
It has been found that calcium silicide is extremely corrosive to all metals including refractory metals.
By reducing the calcium oxide and dissolved carbon dioxide in the electrolyte and silica particles at the same time, calcium intermetallic silicide (CaSi 2) is formed.
Silicon-based fuels are used in certain time-delayed mixtures, such as control explosive bolts, grenades and infrared decoys. The flue gas composition usually contains hexachloroethane. During the combustion process, they will produce silicon tetrachloride, just like the titanium tetrachloride used in smoke filters, it reacts with moisture in the air to form a dense white mist. Some mixtures use gum arabic to inhibit the decomposition of calcium silicide.
The self-heating canned military rations invented during World War II used a 1:1 mixture of iron oxide and calcium silicide similar to bauxite. After the mixture is ignited, an appropriate amount of heat will be generated and no gas will be generated.
Calcium silicide CaSi2 powder price
The price of calcium silicide CaSi2 powder products varies randomly with factors such as production cost, transportation cost, international situation, exchange rate, and supply and demand of calcium silicide CaSi2 powder products. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for calcium silicide CaSi2 powder product materials, please feel free to contact to get the latest price of calcium silicide CaSi2 powder.
Calcium silicide CaSi2 powder supplier
As a global Calcium silicide CaSi2 powder supplier, Tanki New Materials Co. 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, silicid Titanium, calcium silicide, iron boride), high-purity targets, functional ceramics and structural devices, and provide OEM services.
Technical Parameter of Calcium Silicide CaSi2 Powder
| Product Name | MF | Purity | Particle Size | Melting Point | Density | Color |
| calcium silicide | CaSi2 | 99% | 5-10um | 1020℃ | 2.5 g/cm3 | silver black |
Chemical Composition of Calcium Silicide CaSi2 Powder
| CaSi2 | Ca | Si | C | P | Fe | S |
| ＞99% | 57.12% | 41.5% | 0.2% | 0.02% | 0.29% | 0.015% |
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