Novel polycrystal magnetostriction material based on morphotropic phase boundary and preparation method of novel polycrystal magnetostriction material based on morphotropic phase boundary

A magnetostrictive material and quasi-isomorphic phase boundary technology, applied in the field of new materials, can solve the problems of low magnetostriction coefficient of FeGa alloy, achieve the effects of promoting application and development, improving mechanical properties, and reducing material cost

Inactive Publication Date: 2017-03-08
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the magnetostriction coefficient of the actually prepared FeGa alloy is very low, less than 1 / 3 of the Terfenol-D alloy. To meet its application requirements, it is necessary to find ways to further increase its magnetostriction coefficient

Method used

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  • Novel polycrystal magnetostriction material based on morphotropic phase boundary and preparation method of novel polycrystal magnetostriction material based on morphotropic phase boundary
  • Novel polycrystal magnetostriction material based on morphotropic phase boundary and preparation method of novel polycrystal magnetostriction material based on morphotropic phase boundary

Examples

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Effect test

Embodiment 1

[0032] The composition is (Fe 7.79 Ga 2.21 ) 50 (CeFe 7 ) 50 alloy. The purity of raw materials is higher than 99.99%, and the total weight of smelting target is 1500g. Calculate the atomic percentages of Fe, Ga, and Ce respectively, and convert them into weight percentages. The weights of the three components are 1107.02g, 183.95g, and 209.03g, respectively. In order to shorten the smelting time and reduce the burning loss of elements, raw materials, especially pure iron rods, should be processed into short rods.

[0033] First vacuum the vacuum induction melting furnace to 3×10 -2 Pa, then turn on the electricity to heat up, fill in 99.999% high-purity argon to 0.6 standard atmosphere, wash the furnace twice, when the temperature rises to 1350°C, fill in argon to 1.05 standard atmosphere, and then increase the power to melt as soon as possible . After 2 minutes of melting the charge, cast it into a polycrystalline rod of Φ18×100mm. The polycrystalline rod is kept at...

Embodiment 2

[0036] The composition is (Fe 7.79 Ga 2.21 ) 60 (CeFe 7 ) 40 alloy. The purity of raw materials is higher than 99.99%, and the total weight of smelting target is 1500g. Calculate the atomic percentages of Fe, Ga, and Ce respectively, and convert them into weight percentages. Only the weights of the three components are 1107.40g, 223.38g, and 169.22g, respectively.

[0037] First vacuum the vacuum induction melting furnace to 2×10 -2 Pa, then turn on the electricity to heat up, fill in 99.999% high-purity argon to 0.7 standard atmosphere, wash the furnace twice, when the temperature rises to 1300°C, fill in argon to 1.1 standard atmosphere, and then increase the power to melt as soon as possible . After 3 minutes of melting the charge, cast it into a polycrystalline rod of Φ18×100mm. The polycrystalline rod is kept at 1000°C for 1.5h in a vacuum sintering furnace, then cooled to 700°C with the furnace for 5h, and after two-stage heat treatment, the polycrystalline magne...

Embodiment 3

[0039] The composition is (Fe 7.79 Ga 2.21 ) 70 (CeFe 7 ) 30 alloy. The purity of raw materials is higher than 99.99%, and the total weight of smelting target is 1500g. Calculate the atomic percentages of Fe, Ga, and Ce respectively, and convert them into weight percentages. Only the weights of the three components are 1107.79g, 263.76g, and 128.45g, respectively.

[0040] First vacuum the vacuum induction melting furnace to 2~5×10 -2 Pa, then turn on the electricity to heat up, fill in 99.999% high-purity argon to 0.8 standard atmosphere, wash the furnace twice, when the temperature rises to 1400°C, fill in argon to 1 standard atmosphere, and then increase the power to melt as soon as possible . After 2.5 minutes of melting the charge, it is cast into a polycrystalline rod of Φ18×100mm. After the polycrystalline rod is kept at 1000°C for 1 hour in a vacuum sintering furnace, it is cooled to 900°C with the furnace and held for 3 hours. After two-stage heat treatment, t...

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Abstract

The invention relates to the technical field of new materials, in particular to a novel polycrystal magnetostriction material based on a morphotropic phase boundary and a preparation method of the novel polycrystal magnetostriction material based on the morphotropic phase boundary. The novel polycrystal magnetostriction material is shown as a molecular formula (Fe7.79Ga2.21)x(RMFeN)100-x, wherein mole percentage content of x is not less than 50 and not more than 80; R refers to at least one of Ce, Pr, Nd and Sm; M refers to 1 or 2, N is 7 when M is 1, and N is 7 when M is 2. The novel polycrystal magnetostriction material is made from light rare earth elements rather than expensive heavy rare earth, thereby being low in material cost. The preparation method is simple and low in preparation cost, and the novel polycrystal magnetostriction material is excellent in performance and is of great significance to promotion of application and development of magnetostriction materials.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a novel polycrystalline magnetostrictive material based on a quasi-isotype phase boundary and a preparation method thereof. Background technique [0002] Magnetostrictive material is a kind of ferromagnetic substance, its size is elongated (or shortened) under the action of external magnetic field, and its size returns to its original length after removing the external magnetic field. This material is widely used in micro-displacement drives, robots, ultra-precision machining, various precision instruments, automatic braking systems, fuel / injection injection systems, ultrasonic medical technology, high-power transducers, sonar systems and other electronics, automobiles, aviation, etc. and other fields. [0003] The quasi-isomorphic phase boundary (Morphotropic Phase Boundary, MPB) is a ferroelectric phase diagram, a boundary that separates two crystal configurations that a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/52C30B28/06H01L41/20
CPCC30B28/06C30B29/52H10N35/85
Inventor 周廷栋张煜宋天秀顾琳李玉和陈文静蔡擎
Owner XIHUA UNIV
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