Method for controlling large-size FeGa magnetostrictive single crystal to grow on solid-liquid interface

A magnetostrictive, solid-liquid interface technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of weakened one-way heat conduction, insufficient heat exchange, etc., and achieve good comprehensive usability and simple process equipment , less volatile effect
CN109868508AActive Publication Date: 2019-06-11BEIHANG UNIV +1
6 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2019-06-11

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a method for controlling a large-size FeGa magnetostrictive single crystal to grow on a solid-liquid interface. The method comprises the following steps: 1) carrying out proportioning according to target components; 2) smelting a mother alloy by using a vacuum non-consumable electric arc smelting furnace; 3) melting a mother alloy ingot by utilizing a magnetic suspension induction smelting furnace, and carrying out casting to form mother alloy bars; and 4) placing the mother alloy bars and FeGa single-crystal seed crystals in a double-layer crucible, placing the double-layer crucible into directional solidification equipment, carrying out heating to completely melt the mother alloy bars and melt the upper part of the FeGa single-crystal seed crystals, and pulling thelower part of the melted material into a cooling liquid along the lower part of the FeGa single-crystal seed crystals to carry out directional solidification, so that the large-size FeGa magnetostrictive material is prepared. The method is simple in process equipment and is convenient to operate, a prepared FeGa single crystal saturated magnetic field is only 500 Oe, the magnetostrictive coefficient is up to 300-320 ppm, comprehensive usability is good, and the application prospect is wide.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of single crystal growth, in particular to a method for growing a large-size FeGa magnetostrictive single crystal by controlling a solid-liquid interface. Background technique

[0002] The length and volume of ferromagnetic materials and ferrimagnetic materials can change under the action of an external magnetic field due to the change of their own magnetization state. This phenomenon is called magnetostriction, which was discovered by Joule in 1842. Magnetostrictive materials with this effect are important new magnetically driven smart materials, which can realize the mutual conversion of electromagnetic energy and mechanical energy. Magnetostrictive materials have the advantages of high mechanical energy-electromagnetic energy conversion efficiency, high energy density, and high response frequency, and the prepared magnetostrictive devices have strong reliability and simple driving methods. Magnetostrictive materia...

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