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China, Chinese Lanthanum Oxide La2o3 Rare Earth Oxide Treo1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Inorganic ChemicalsOxideLanthanum Oxide 99.999White Cerium Oxide
HENAN KINGWAY TECHNOLOGY CO., LTD.
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Product Description Lanthanum Oxide La2O3,Properties Molecular formula La2O3 Molar mass 325.81 g/mol Appearance White powder, hygroscopic Density 6.51 g/cm3, solid Melting point 2315 'C (2588 K)Boiling point 4200 'C (4500 K)Solubility in water Insoluble CAS No.: 1312-81-8EINECS No.:215-200-5 spec typicalTREO: 97% min. 98.5%La2O3/TREO: 99.9% min. 99.95% CeO2/ TREO: 0.025% max. 0.01% Pr6O11/TREO: 0.025% max. 0.01%Nd2O3/TREO: 0.015% max. 0.01% Sm2O3/TREO: 0.02% max. 0.003%Y2O3/TREO: 0.01% max. 0.001%Fe2O3: 0.02% max. 0.008%CaO: 0.20% max. 0.07% Cl: 0.10% max. 0.06%SiO2: 0.03% max. 0.03%L.O.I.: 3% max. 1.2%Synthesislanthanum oxide crystallizes as several polymorphs.To produce hexagonal La2O3, a 0.1 M solution of LaCl3 is sprayed onto a preheated substrate, usually made of metal chalcogenides.[3] The process can be viewed as occurring in two steps - hydrolysis followed by dehydration:2 LaCl3 + 3 H2O → La(OH)3 + 3 HCl2 La(OH)3 → La2O3 + 3 H2OAn alternative route to hexagonal La2O3 involves precipitation of nominal La(OH)3 from aqueous solution using a combination of 2.5% NH3 and the surfactant sodium dodecyl sulfate followed by heating and stirring for 24 hours at 80 °C:2 LaCl3+ 3 H2O + 3 NH3 → La(OH)3 + 3 NH4ClLaCl3·3H2O → La2O3Other routes include:2 La2S3 + 3 CO2 → 2 La2O3 + 3 CS22 La2(SO4)3 + heat → 2 La2O3 + 6 SO3Other cations Scandium(III) oxideYttrium(III) oxideActinium(III) oxide Related compounds Lanthanum aluminium oxide,LaSrCoO4 Lanthanum oxide is a white amorphous powder. The density of 6.51g/cm3. The melting point of 2217 DEG C. Boiling point is 4200 oC. Slightly soluble in water, soluble in acid and generates the corresponding salts. Exposed to air is easy to absorb carbon dioxide and water, gradually become lanthanum carbonate. Burning lanthanum oxide hydrate release a lot of heat.The main application areas for the manufacture of special alloy precision optical glass with high refractive index, optical fiber board, suitable for the camera, camera, microscope lens and senior optical prisms. Also used in the manufacture of ceramic capacitor, piezoelectric ceramic doping agent and X ray luminescence materials with lanthanum oxide powder. Cerium lanthanum phosphorus ore by extraction or by burning or lanthanum nitrate and lanthanum carbonate. Can also be made by lanthanum oxalate heating decomposition can be prepared. Used as catalysts for many reactions, such as doped cadmium oxide catalytic carbon monoxide oxidation reaction, doped palladium catalytic hydrogenation of carbon monoxide to generate methane reaction. Leach into the lithium oxide or zirconium oxide lanthanum oxide ( 1% ) can be used for manufacturing ferrite magnet. Oxidative coupling of methane generation is ethane and ethylene very effective selective catalyst. For the improvement of barium titanate, strontium titanate ( BaTiO3 ) ( SrTiO3 ) of the temperature dependence of ferroelectric and dielectric properties, as well as the manufacture of fiber optics and optical glass.The physical and chemical properties of lanthanum oxideAppearance and properties: white solid powder.Chinese Name: lanthanum oxideChinese Name: three two lanthanum oxideMolecular formula: La2O3Relative molecular mass: 325.84 lanthanum oxideRelative density: 6.51 g/mL at 25 °C ( LiMelting point: 2315 ° CBoiling point: 4200 ° CSolubility: soluble in acid, ethanol, ammonium chloride, insoluble in water, ketone.The use of lanthanum oxideMainly used in the manufacture of precision optical glass, optical fiber. Also used in the electronics industry for ceramic capacitor, piezoelectric ceramics doped with agent. Also used for preparing lanthanum boride raw material, the separation of petroleum refining catalyst. Lanthanum oxide handling and storageMatters needing attention : closed operation, overall ventilation. The operator must go through specialized training, strict compliance with operating procedures. Proposed operators wear for filter type respirators ( half mask ), wear safety glasses, wear anti-static overalls, wear oil resistant rubber gloves. Away from fire, heat, smoking is prohibited in the workplace. The use of explosion-proof ventilation systems and equipment. To prevent steam leakage in the air of workplace. Avoid oxidizing agents, acids, alkali contact. When the filling velocity should be controlled, and a grounding device, prevent the accumulation of static electricity. When moving to light light unloading, prevent damage to packaging and containers. Equipped with the appropriate variety and quantity of fire-fighting equipment and emergency treatment equipment for leakage. May be left empty containers of hazardous material.
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