The Different Types of Phosphide Powder


Aug 21, 2023

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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 phosphine in which the hydrogen atoms were replaced with metals atoms. Most ionics phosphates can be decomposed in acids. 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 chromium, silicon, and alum.
Iridium-phosphide pens are made from this extremely stable and hard material.
Magnesium Phosphide releases 50% 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.
Deoxidizers can be made with copper phosphide.
A phosphating grains is 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, signal bombs, and fireworks. Zinc phosphide, a dark gray powder that has an unpleasant odor and 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 interacting with an electric current or flame. Aluminum phosphide should be dried, stored and released highly toxic gas 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 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 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. Inhalation of the gas phosphine may affect the heart and respiratory system as well as kidneys, stomachs, nerves, and liver.

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