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Lanthanum-Cerium Phosphate

White or light yellow powder, the specific color depends on the oxidation state of cerium, with a high melting point (>1500°C) and excellent high-temperature stability. It is insoluble in water but soluble in strong acids (such as concentrated sulfuric acid and nitric acid). Its structure is similar to that of natural monazite (CePO₄), belonging to the monoclinic crystal system. Lanthanum (La³⁺) and cerium (Ce³⁺) occupy rare earth sites within the crystal, forming a dense structure with phosphate groups, exhibiting high chemical stability and radiation resistance
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(1) Catalyst and catalytic carrier, automobile exhaust purification, cerium (Ce) oxygen storage capacity (OSC) can adjust the oxygen content in the exhaust gas, used in three-way catalyst (TWC), to promote the conversion of CO, HC and NOₓ; oxidation reaction catalyst, catalytic dehydrogenation of alkanes, CO oxidation and other reactions in petrochemical industry.

(2) Fluorescence and luminescent materials: After doping rare earth ions such as Eu³⁺ and Tb³⁺, they can emit fluorescence of specific wavelengths (such as CePO₄:Tb³⁺ emitting green light), which is used in LED and display backlight.

(3) Ceramic and coating materials: high melting point and low thermal conductivity make it suitable for aero-engine coatings. Corrosion-resistant ceramics: used in nuclear reactors or chemical equipment for acid resistant and high temperature components.

(4) Nuclear waste solidification: The structure of the sole stone can stably accommodate radioactive elements (such as uranium and plutonium), reducing the risk of nuclear waste leakage.

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