Silicide, calcium potassium

Calcium sulphate is reduced violently by aluminium. In the presence of this sulphate, red phosphorus, which was previously treated by potassium nitrate and calcium silicide, combusted violently. 

Barium sulphate is not a strong oxidant yet it can give rise to a very violent thermite reaction when it is heated in the presence of a very electropositive metal. This applies to aluminium for which an accident was described. In addition, there was an accident which involved a mixture of this sulphate with red phosphorus although the latter had been previously treated with potassium nitrate and calcium silicide. 

A mixture of potassium nitrate (or sodium nitrate) and calcium silicide (60 40) is a readily ignited primer which bums at a very high temperature. It is capable of... 

Excess red phosphorus will bum admixed with barium or calcium sulfates if primed at a high temperature with potassium nitrate-calcimn silicide mixture. 

Silicon carbide is comparatively stable. The only violent reaction occurs when SiC is heated with a mixture of potassium dichromate and lead chromate. Chemical reactions do, however, take place between silicon carbide and a variety of compounds at relatively high temperatures. Sodium silicate attacks SiC above 1300°C, and SiC reacts with calcium and magnesium oxides above 1000°C and with copper oxide at 800°C to form the metal silicide. Silicon carbide decomposes in fused alkalies such as potassium chromate or sodium chromate and in fused borax or cryolite, and reacts with carbon dioxide, hydrogen, air, and steam. Silicon carbide, resistant to chlorine below 700°C, reacts to form carbon and silicon tetrachloride at high temperature. SiC dissociates in molten iron and the silicon reacts with oxides present in the melt, a reaction of use in the metallurgy of iron and steel (qv). The dense, self-bonded type of SiC has good resistance to aluminum up to about 800°C, to bismuth and zinc at 600°C, and to tin up to 400°C a new silicon nitride-bonded type exhibits improved resistance to cryolite. 

See Potassium nitrate Calcium silicide See other METAL NON-METALLIDES... 

Primer compositions fall into two main categories corrosive mix types based on potassium chlorate/lead thiocyanate and noncorrosive mix types based on lead styphnate/tetracene. Some of these mixes were listed in the previously in Table 23.2. High-temperature-resistant mixes (designated by a G following the mix name or number) are a varient of the corrosive mix types. These are based on potassium chlorate /antimony trisulfide/calcium silicide. 

The term SINOXID is made up of sine and oxide and means without rust . It underlines the fact that this composition is not susceptible to corrosion as against mercury fulminante or potassium chlorate mixtures. SINOXID compositions consist of the following components Lead tricinate, -> tetracene, - Barium Nitrate, lead dioxide, antimony trisulfide and calcium silicide. These components meet all requirements currently applied in ammunition technology. SINOXID compositions feature very good chemical stability and storage life, they are abrasion-, erosion- and corrosion-free and ignite propellants with precision. 

Moissan, Henri. (1852-1907). A Native of Paris, Moissan was a professor at the School of Pharmacy from 1886 to 1900 and at the Sorbonne from 1900 to 1907. At the former institution, he first isolated and liquefied fluorine in 1886 by the electrolysis of potassium acid fluoride in anhydrous hydrogen fluoride. His work with fluorine undoubtedly shortened his life as it did that of many other early experimenters in the field of fluorine chemistry. He won great fame by his development of the electric furnace and pioneered its use in the production of calcium carbide, making acetylene production and use commercially feasible in the preparation of pure metals, such as magnesium, chromium, uranium, tungsten etc. and in the production of many new compounds, e.g., silicides, carbides, and refrac-... 

EXPLOSION and FIRE CONCERNS nonflammable NFPA rating (NA) reacts violently or explosively upon heating when mixed with aluminum powder will ignite at high temperatures when mixed with phosphorus mixtures with diazomethane vapor can result in an explosive exothermic reaction when primed at a high temperature with a potassium nitrate-calcium silicide mixture, mixtures with excess red phosphorus will bum containers may explode when heated toxic fumes of oxides of sulfur are emitted when heated to decomposition use water spray, dry chemical, carbon dioxide, fog, or regular foam for firefighting purposes. 

Olin- Winchester Chlorate Base Copper, zinc, potassium chlorate, lead thiocyanate, paper, calcium silicide, barium nitrate, glass powder It is unlikely that the amount of particles that someone would be exposed to from firing would be sufficient to cause any of these effects. ... 

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