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Thursday, January 3, 2013
Preparation of calcium phosphate
Calcium phosphate and calcium phosphate three. The actinic blueprint of Ca3 ( PO4 ) 2. White clear or baggy powder. The about body of 3.14, melting point 1670 ℃; acrid in acid, baffling in baptize and ethanol. Calcium phosphate precipitation. Acclimated in the accomplish of milk glass, ceramics, paint, mordant, medicine, fertilizer, beastly augment additives, antiseptic abstract agent, artificial stabilizers. Calcium phosphate is accomplishment phosphorus raw abstracts for ceramics, glass; and, pharmacy, fertilizer, augment and added aspects; aswell acclimated as a aqueous alkali particles coat, anticipate them from wet acclimate deliquescence. In the assembly processing, the use of the process, calcium phosphate crumb into the respiratory tract, the activity abuse depends on the birthmark in silicon dioxide and fluoride. According to apropos abstracts report, phosphate alone at doses that are large, it may could cause systemic baneful effects, in accepted assembly altitude dosage not dangerous.
Calcium phosphate in apatite and ashes. Can be fabricated of calcium chloride and sodium phosphate or by adhesive and phosphoric acerbic system. In a cyclone furnace, phosphate bedrock and abacus additives, aqueous at top temperature and baptize vapour furnishings of fluoride abatement reaction, cook by baptize abatement quenching, stoving, cutting products. Or bedrock phosphate crumb and a baby bulk of sodium carbonate ( or sodium sulfate ) and a baby bulk of phosphoric acerbic mixture, in a rotary anhydrate or baking boiler in 1350 ℃calcination ( with oil or accustomed gas for dye ), afterwards cooling to access the frit grinding. In 1180 ℃quenching into αtype, at 1180℃slow cooling into βtype. Stored in a cool, blast of the treasury. Away from fire, calefaction source. Should be stored alone with acrylic, abstain bond reservoir. Storage areas should be able with adapted abstracts cover leakage.
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