Aluminum-containing element 14.4044
Phosphorus-containing element 25.7617
Melting point (℃) gt; 1500
Aluminum phosphate
Chinese name aluminum phosphate
English name aluminum phosphate
Structure or molecular formula
Density 2.566
Melting point (℃) gt; 1500
Characteristics
White orthorhombic crystal or powder.
Dissolution
Insoluble in water, soluble in concentrated hydrochloric acid, concentrated nitric acid, alkali and alcohol.
Uses
It is a flux for the manufacture of special glass, a bonding agent for ceramics and teeth, and an additive for the production of emollient, fire retardant coatings, conductive cement, etc. It is used as an antifouling agent in the textile industry and as a catalyst in organic synthesis. It is also used in the pharmaceutical industry and paper industry.
Preparation or source
It is obtained by dissolving sodium aluminate into a concentrated solution with hot water and reacting with phosphoric acid or by metathesis of trisodium phosphate and aluminum sulfate.
Others
It is relatively stable at 580℃ and does not melt at 1400℃ and becomes a colloid. Between room temperature and 1200°C, aluminum phosphate has four crystal forms, the most common one being α form.