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三氟化镝

Dysprosium Fluoride

CAS: 13569-80-7

Molecular Formula: DyF3

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三氟化镝 - Names and Identifiers

Name Dysprosium Fluoride
Synonyms Dysprosium Fluoride
Dysprosium trifluoride
dysprosium(iii) fluoride, anhydrous
dysprosium(iii) fluoride, anhydrous, reacton
CAS 13569-80-7
EINECS 236-992-9
InChI InChI=1/Dy.3FH/h;3*1H/q+3;;;/p-3

三氟化镝 - Physico-chemical Properties

Molecular FormulaDyF3
Molar Mass219.5
Density7.5
Melting Point1360 °C
Boling Point2200 °C
Water SolubilitySoluble in strong mineral acids. Insoluble in water.
Vapor Presure922mmHg at 25°C
Appearancepowder
ColorWhite
Exposure LimitACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3
Stabilityhygroscopic
SensitiveHygroscopic
Physical and Chemical PropertiesBoiling Point: 2200
Melting Point: 1360

三氟化镝 - Risk and Safety

Hazard SymbolsXi - Irritant
Irritant
Risk Codes36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany3
TSCAYes
HS Code28469032
Hazard NoteHygroscopic

三氟化镝 - Reference Information

EPA chemical substance information information provided by: ofmpeb.epa.gov (external link)
Application dysprosium fluoride is mainly used for preparing dysprosium-containing metal alloys, and its application examples are as follows:
1) preparation of rare earth dysprosium alloy, method in the fluoride molten salt system, adding the mixture of rare earth oxide and dysprosium oxide as electrolytic raw materials, electrolytic production.
2) to prepare a coated sintered magnet of NdFeB, A transition layer containing dysprosium or terbium is formed inside the magnet in contact with the dysprosium fluoride or terbium fluoride coating.
3) a dysprosium metal alloy is prepared, which is divided into 10% to 50% dysprosium and 50% to 90% neodymium or 50% to 90% neodymium and 0 to 30% praseodymium by weight percentage.
preparation The preparation principle is as follows: the generated FeF3 and h2sif6 are both dissolved in acidic solution, while KSP(AlF 3)= 2 .015*10 -5, the solubility of AlF 3 in solution is small, and insoluble in acidic solution, most of which will be co precipitated in dyf3. The aluminum in solution will be co-precipitated in dyf3. Therefore, in order to reduce the entry of aluminum into the rare earth fluoride, the aluminum must be removed as much as possible before fluorination, and in order to reduce the subsequent washing workload, the iron-Silicon impurities in the solution must also be removed as much as possible. The conventional hydrogen fluoride precipitation method can reduce the cost of rare earth separation plants, but is disadvantageous for the removal of non-rare earth impurities due to the difficulty of washing and clarification after fluorinated precipitation. In order to produce high-quality dysprosium fluoride stably, the non-rare earth impurities in dysprosium chloride solution are treated in this process, and then coarse-grained dysprosium fluoride precipitates are prepared in dysprosium chloride solution with composite fluorinating agent, dysprosium fluoride precipitation after washing, filtration, drying and vacuum dehydration to produce high quality dysprosium fluoride products. Its process flow is shown in figure.
Application is used to prepare dysprosium metal and magnetostrictive materials. Rare earth fluoride is an important raw material for the preparation of single rare earth metal by metal thermal reduction method, and its quality directly affects the quality of rare earth metal, it is the key material to restrict the production of heavy rare earth metals and the performance index of heavy rare earth metal products.
Last Update：2024-04-10 22:29:15
三氟化镝
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Hefei TNJ Chemical Industry Co.,Ltd.
Product Name: Dysprosium Fluoride Request for quotation
CAS: 13569-80-7
Tel: 0086-551-65418684
Email: sales@tnjchem.com
　　　　 info@tnjchem.com
Mobile: 0086 189 4982 3763
QQ: 2881500840 Click to send a QQ message
Wechat: 0086 189 4982 3763
WhatsApp: 0086 189 4982 3763
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三氟化镝
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