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 derivatives from phosphines, where the hydrogen atoms were replaced with metals atoms at equal amounts. 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 most cannot be broken down by acids or water.

Phosphide Powder Application
Ferric phosphor (22-39% P) can be used to make high-strength alloy steel. Steel with 0.1-0.3% phosphorus (alloyed), for example, will have a greater strength and resistance to corrosion. 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 pens are made from this extremely stable chemistry and hard material.
Magnesium Phosphide releases a 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 has a melting temperature above 420 degrees Celsius, is non-combustible when ignited, and its density is 4.55 grams per cubic centimeter (18). It’s soluble in lye or oil, but can also dissolve in water. Zinc phosphide poison baits that contain 2% to 3% zinc powder with red phosphorus at 550 degrees are used for rats and voles. 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. It is made from aluminum powder and red-phosphorus, which are acted upon by an electric current or flame. Aluminum phosphide should be dried and stored. It releases highly toxic phosphide 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 gas cylinders, is a colorless, highly flammable and toxic liquefied gas. Its storage pressure (522psig) is 70oF of its vapor-pressure. The gas is heavier and smells similar to fish. When traces of other phosphorus-hydrides like ethophosphate is found, it will cause spontaneous combustion. Phosphine has been classified as a gas that is highly toxic and spontaneously flameable. Inhaling phosphine may affect the heart and respiratory system as well as the kidneys, stomach nervous system, liver and stomach.

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