Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of magnesium praseodymium alloy with high praseodymium content and fused salt electrolysis thereof

A technology of molten salt electrolysis and praseodymium alloy, which is applied in the field of magnesium praseodymium alloy and magnesium praseodymium alloy preparation, can solve the problems of difficult addition of rare earth, high price of rare earth, uneven composition, etc., and meet the requirements of energy saving, equipment and experimental conditions Low, the effect of shortening the production process

Inactive Publication Date: 2013-10-30
HARBIN ENG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two problems in the development of rare earth magnesium alloys: (1) rare earths are expensive and cannot be used; (2) rare earths are not easy to add, the composition is uneven, and the yield is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of magnesium praseodymium alloy with high praseodymium content and fused salt electrolysis thereof
  • Preparation method of magnesium praseodymium alloy with high praseodymium content and fused salt electrolysis thereof
  • Preparation method of magnesium praseodymium alloy with high praseodymium content and fused salt electrolysis thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: In the electrolysis furnace, with LiCl-KCl-MgCl 2 -PrCl 3 Molten salt electrolyte system, the mass ratio of each electrolyte in the system is LiCl: KCl: MgCl 2 : PrCl 3 =45:45:9:1, the working electrode adopts corrosion-resistant inert cathode, such as tungsten and molybdenum, the auxiliary electrode adopts graphite, silver / silver chloride (1wt.%) is the reference electrode, and the potential value is controlled at -1.85V Nearby, ion co-deposition was performed at 630°C, and the electrolysis time was 3 hours. A magnesium-praseodymium alloy is deposited near the working electrode in the molten salt electrolyzer, and the mass fraction of praseodymium in the alloy is 9.7%. Among them, lithium chloride, potassium chloride and magnesium chloride are dried at 300°C for 24 hours. Anhydrous praseodymium chloride is prepared by mixing praseodymium oxide and ammonium chloride at a mass ratio of 4:1 and then chlorinating in a vacuum drying oven. Yes, the chlorination tem...

Embodiment 2

[0017] Example 2: In the electrolysis furnace, with LiCl-KCl-MgCl 2 -PrCl 3 Molten salt electrolyte system, the mass ratio of each electrolyte in the system is LiCl: KCl: MgCl 2 : PrCl 3 =45:45:8:2, the working electrode adopts corrosion-resistant inert cathode, such as tungsten and molybdenum, the auxiliary electrode adopts graphite, silver / silver chloride (1wt.%) is the reference electrode, and the potential value is controlled at -1.85V Nearby, ion co-deposition was performed at 630°C, and the electrolysis time was 3 hours. A magnesium-praseodymium alloy is deposited near the working electrode in the molten salt electrolyzer, and the mass fraction of praseodymium in the alloy is 14.5%.

Embodiment 3

[0018] Example 3: In the electrolysis furnace, using LiCl-KCl-MgCl 2 -PrCl 3 Molten salt electrolyte system, the mass ratio of each electrolyte in the system is LiCl: KCl: MgCl 2 : PrCl 3 =45:45:9:3, the working electrode adopts corrosion-resistant inert cathode, such as tungsten and molybdenum, the auxiliary electrode adopts graphite, silver / silver chloride (1wt.%) is the reference electrode, and the potential value is controlled at -1.85V Nearby, ion co-deposition was performed at 630°C, and the electrolysis time was 3 hours. Magnesium praseodymium alloy is deposited near the working electrode in the molten salt electrolyzer, and the mass fraction of praseodymium in the alloy is 18.6%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method of a magnesium praseodymium alloy with high praseodymium content and fused salt electrolysis thereof. In an electrolytic furnace, LiCl-KCl-MgCl2-PrCl3 is an electrolytic system; the mass percents of electrolytes are as follows: 44-45%, 44-45%, 8-9% and 1-4%; the electrolytes are heated to the temperature of 630 DEG C for fusing; metal tungsten or molybdenum is used as a working electrode, graphite is an auxiliary electrode and 1wt% of silver or silver chloride as a reference electrode; a potential valve is controlled about-1.85V at the electrolytic temperature of 630 EDG C; electrolysis is carried out for 180 minutes; magnesium praseodymium alloy is deposited in a fused salt electrolytic cell near the working electrode, wherein the mass percent of the praseodymium is 9.7-23.2% and the balance of magnesium. Any metal needs not to be used as a raw material, but metal chloride is completely adopted to be used as the raw material; the magnesium praseodymium alloy with different components and high praseodymium content can be obtained through controlling electrolyte proportion; the mass percent of the praseodymium in the alloy is 9.7-23.2%; and the whole process is simple, low in equipment and experimental conditions and less in energy consumption and pollution.

Description

Technical field [0001] The invention relates to a magnesium-based alloy, specifically a magnesium-praseodymium alloy. The invention also relates to a preparation method of the magnesium praseodymium alloy. Background technique [0002] Magnesium alloys have excellent properties such as low specific gravity, high specific strength, easy processing and recycling, as well as good damping and shock absorption and electromagnetic shielding properties, and are widely used in the automotive and aerospace industries. However, magnesium is easy to react with air and water to be oxidized and absorb hydrogen. The traditional magnesium alloy has poor corrosion resistance, wear resistance, heat resistance, strength, especially high temperature creep resistance, which limits its wide application and cannot meet the key components of engine and The need for transmission components. However, adding a proper amount of rare earth (as an additive and alloying element) to the magnesium alloy can p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C25C3/36
Inventor 张密林唐浩颜永得韩伟张志俭
Owner HARBIN ENG UNIV