11141-21-2
Didymia;Didymium oxide
CAS: 11141-21-2
Molecular Formula: Nd2O6Pr2
11141-21-2 - Names and Identifiers
11141-21-2 - Physico-chemical Properties
| Molecular Formula | Nd2O6Pr2 |
| Molar Mass | 666.29 |
| Use | For the electromechanical industry |
11141-21-2 - Reference Information
Open Data Unverified Data
| Quality Standard | the quality standard of prasodium oxide specifies the chemical composition in GB XBT206-007, but there is no specification of physical properties. The production method of pradm metal is similar to that of aluminum electrolysis, and the molten salt electrolysis method is adopted, and the working principle of the electrolysis furnace is the same. At present, the electrolytic aluminum industry for the influence of alumina physical properties of electrolytic production of more in-depth research, at the same time on how to improve the physical properties of alumina to meet the requirements of modern aluminum electrolysis research is also more. In rare earth industry, there are many researches on the influence of chemical indexes such as impurities (such as Si, Ca, Fe, S, Cl) and content on electrolytic production, however, there are few studies on the influence of physical properties of praseodymium oxide on electrolytic production and improvement of its physical properties. Due to the difference in physical properties, the physical properties of the engineered and produced prynd oxides show different behaviors when they are applied to the electrolytic production of prydynd metal in molten salt. |
| physical properties | in the process of rare earth electrolysis, the main requirements for the physical properties of raw material of the oxide are: the dissolution rate of PRD oxide in the electrolyte is fast, and the precipitation at the bottom of the furnace is less; The flying loss is less, the loss of PRD oxide is low; The wear index is small, the strength is large, and the screening, mixing, transportation, the particle breakage is less in the process of loading and unloading; The particle fluidity is good. The physical properties of PRND oxide are characterized by specific surface area, particle size, wear index and so on. 1. The specific surface area of the oxide is large, the electrolyte has good wettability, the dissolution rate in the electrolyte is fast, the bottom is not easy to sink, and the electrolysis effect is good. The small specific surface area of the oxide indicates that the degree of ignition is high, the degree of crystallinity is improved, the dissolution rate in the electrolyte is reduced, and the bottom of the furnace is precipitated and further settled, which is unfavorable for electrolytic production and furnace age. 2. Particle size A uniform particle size of the praddym oxide is required for molten salt electrolysis. In general, the particle size is inversely proportional to the specific surface area, that is, the smaller the particle size, the larger the specific surface area, but too small a particle size will increase the flying loss of the oxide. The particle size of PRND oxide is related to the choice of precipitant. The particle size of PRND oxide produced with sodium carbonate as precipitant is smaller, and the particle size produced with ammonium carbonate as precipitant is larger. |
| Application | neodymium metal is the main raw material for the production of high-performance nd-Fe-B permanent magnet materials, and its preparation method is based on neodymium oxide as raw material, produced by molten salt electrolysis in an electrolytic furnace. The Electrolytic synthesis of NdrPFe alloy in fluoride molten salt (BaFZ-LIF-RE3F) by using the rich neodymium oxide (REO) as raw material is reasonable and economical, ndPrFe alloys can be used to prepare NdFeB class permanent magnets with a magnetic energy product of 29-35mgoe. The electric furnace is heated by SiC rod, and the silicon rectifier is used as the electrolytic power source. |
| Use | for the electromechanical industry |
Last Update：2024-04-09 19:43:38
