Aluminum-Cerium Intermediate Alloy

• Certification: ISO
• Shape: Block
• Purification Method: Electromigration
• Preparation Method: Metallothermic Reductio
• Application: Catalyst Masses, Energy Materials, Photoelectric Material, Computer, ICT
• Product Type: Rare Earth Metal
• Model NO.: ALCe10 alloy
• Composition: Al90-CE10
• Transport Package: Packed in Wooden Cases/Iron Drums
• Specification: 5 kg /8 kg /12 kg
• Trademark: taixie
• Origin: China
• HS Code: 7806009000
• Production Capacity: 500 / Ton

Product Description

The invention is a high-energy ultrasonic preparation method of aluminum-cerium intermediate alloy, which includes the following steps :(1) put pure aluminum ingot into a crucible and heat it until melting, wrap the rare-cerium particles with a diameter of 20-100um with aluminum foil and press them into the pure aluminum melt, and hold them in the range of 725ºC ~ 745ºC for 20 ~ 30 minutes, in which the rare-cerium content is 18% of the total weight; (2) Then the ultrasonic amplifiers were extended into the alloy to apply intermittent high-energy ultrasound 8-15mm below the surface of the molten body fluid, with ultrasonic intensity ranging from 0.6kw/cm2 to 0.8kw/cm2; (3) Ultrasonic application time was 8-15min, each application time of high-energy ultrasound was 30-50 seconds, and the interval time was 30-50 seconds. (4) Then the alloy melt is reduced to 700ºC~710ºC for refining and impurity removal and pouring; The invention has low melting temperature, can effectively avoid rare earth burning loss, stable rare earth content, low energy consumption, and simple process, safe and reliable, uniform alloy composition, reduce segregation.
Aluminum-rare earth alloy has the advantages of small proportion, high strength, high temperature resistance, corrosion resistance and so on. It has a wide application prospect and a great breadth and depth of development. Cerium has long been a "bad" byproduct of rare earth mining and has low value added, resulting in a large backlog of cerium, but the development of aluminum-cerium alloys for use in aero-engines and automotive internal combustion engines is increasing the demand for cerium and aluminum-cerium alloys. Therefore, the study on the preparation technology and properties of aluminum-cerium alloy is of great significance to improve the value of cerium products and promote the balanced and healthy development of rare earth industry. At present, the main production mode of aluminum alloy is fusion method. Some studies suggest that the properties of alloys prepared by molten salt electrolysis are better than those prepared by melting. In this paper, the process of preparing aluminum-cerium alloy by electrolysis is studied and compared with that by fusion method. In this paper, the electrode process and technology of aluminum - cerium alloy prepared by liquid aluminum cathode method were studied. The effects of dehydration temperature, the amount of NH4Cl, dehydration time and dehydration vacuum degree on the dehydration effect of CeCl3·7H2O were investigated, and the better process parameters were determined. The electrochemical behavior of Ce3+ on W electrode and liquid aluminum cathode in NaCl-KCl-CeCl3 system was studied by cyclic voltammetry, square wave voltammetry and constant current step. The results show that the electrochemical reduction process of Ce3+/Ce on the W electrode is a one-step three-electron quasi-reversible process, and the electrochemical process is controlled by diffusion. The reduction of Ce3+ on the liquid aluminum cathode has obvious depolarization effect, and the depolarization value is about 1.0V positive compared with that on the W electrode. The effects of cerium chloride content, cathode current density, electrolytic temperature and other factors on the current efficiency of Al-Ce alloy electrolysis by NaCl-KCl-CeCl3 melt were studied. The better electrolytic process parameters were determined, that is, cerium chloride content of 30%, electrolytic temperature of 750ºC, current density of 1.0A/cm2, and the current efficiency was 92.3%. The effects of holding time, mixing temperature and stirring on the distribution uniformity of the alloy phase of the aluminum-cerium intermediate alloy prepared by the melting method were investigated. The microstructure of the aluminum-cerium alloy was found to be composed of α-Al and Al11Ce3. Aluminum-cerium alloy with 0.3% cerium content was prepared by fusion method and liquid aluminum cathode method, and its mechanical properties and corrosion resistance were tested. The results show that the tensile strength and elongation of the alloy prepared by liquid aluminum cathode electrolysis method are increased by 12.1% and 56.3% respectively, and the corrosion resistance is significantly improved. An aluminum-cerium alloy containing 12.8% cerium was prepared by the chlorination of CeO2 by AlCl3 and co-deposition in NaCl-KCl-AlCl3-CeO2 system. It was found that the distribution of alloy phases was more uniform than that by the fusion method and liquid aluminum cathode method. Codeposition method is expected to be more widely used than fusion method and aluminum cathode method.