The Different Types of Phosphide Powder

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Phosphide Powder Classification
Ionic Phosphates
Alkali metals, metals of the alkaline Earth, zinc, aluminium and other phosphates. You can think of these compounds as phosphine derivatives, where the hydrogen atoms were replaced by metals atoms with equal equivalence. Acids dissolve most ionic phosphates. For instance, calcium phosphide (Ca3P2) reacts quickly with water in order to form hydroxide and phosphide. Zinc Zn3P2 is a phosphide that reacts slowly in water, but readily with acid.

Metallic Phosphide
Phosphates are a mixture of most heavy metals. They have a similar composition and look to metal intercompounds and are difficult to break down by acids or water.

Phosphide Powder Application
Ferric phosphor (22-39% P) can be used to make high-strength alloy steel. Steel’s strength and resistance to corrosion are greatly enhanced by adding 0.1-0.3% phosphorus. Ferric Phosphor is a by-product from single phosphor made by the electric furnace process. In ferric phosphor, there are small amounts of silicon, chrome, alum, and other impurities.
Iridium-phosphide is a chemically stable and extremely hard material that is used to make pens.
Magnesium Phosphide releases about half of its phosphine into moist air.
Aluminum phosphide can also release highly toxic phosphine into moist air. This is why it’s used in grain fumigants.
Copper phosphide can be used as an oxidizer.
The phosphating grain can be used as a semi-conductor.

The Phosphide

Calcium phosphide
It is a reddish-brown crystal or gray granular substance with a melting temperature of approximately 1600 and a relative density of 2.51; it can also be a crystalline material. This material is soluble only in acids, but not in ethanol or ethyl alcohol. It is made by heating aluminum and carbon to reduce the calcium phosphate. It is used to make phosphine bombs, signal bombs, and fireworks. Zinc phosphide, a dark gray powder that has an unpleasant odor and a melting point of above 420 is non-combustible when ignited. The density is 4.55g/cm3(18). Rats and mice are poisoned by Zinc phosphide Baits that contain 2% to 3% zinc powder with red phosphorus at 550. Aluminum phosphide comes in a gray-yellow powder or crystal. It does not melt, sublimate, or decompose at 1000°C. The ignition temperature of the powder is around 100, and its relative density is 2,85. The product is made from aluminum powder and phosphorus red acting with electric currents or flames at 650. Aluminum phosphide should be dried, stored and released highly toxic gas when wet.

Sodium phosphide
The red crystal Na3P is highly toxic and flammable when it reacts with water. Use as a phosphating compound to prepare pesticides and phosphine. Chemical reaction produces red phosphorus by combining metallic sodium and red phosphorus.

Hydrogen phosphide
Phosphine, which is stored in compressed cylinders, is a colorless gas that’s highly toxic and flammable. Its storage pressure (522psig) is 70oF of its vapor-pressure. The gas is heavier and smells similar to fish. When traces of ethophosphate or other phosphorus-hydrides are present, spontaneous combustion occurs. Phosphine has been classified as a highly toxic, spontaneously flammable and highly toxic gas. Inhalation of the gas phosphine may affect the heart and respiratory system as well as kidneys, stomachs, nerves, and liver.

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