Device and method for driving monodisperse micro-droplet to spray and solidify based on giant magnetostriction

A technology of giant magnetostriction and giant magnetostrictive rods, which is applied in the field of devices and methods based on giant magnetostriction-driven monodisperse micro-droplet injection and solidification, and can solve the problems affecting the effect of piezoelectric ceramic droplet injection, piezoelectric Problems such as the permanent disappearance of ceramic polarization and the difficulty of miniaturization of the droplet ejection system have achieved the effects of easy miniaturization design, large output force, and simple structure

Active Publication Date: 2021-06-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the micro-droplet injection system based on piezoelectric ceramic (PZT) as the driver can eject monodisperse droplets, but the output power of the piezoelectric ceramic micro-displacement actuator is small, the output displacement range is small, the working voltage is relatively high, and Due to the lamination structure of piezoelectric ceramics, irregular strain and creep under the working load lead to drift phenomenon, and the size is bound to increase at the same time
In addition, the working temperature of piezoelectric ceramics should be set below half of its Curie temperature. Instantaneous overheating will cause the polarization of piezoelectric ceramics to disappear permanently, so it is not resistant to high temperatures, and strict heat protection settings must be made for PZT , therefore, it will inevitably affect the ejection effect of the piezoelectric ceramic as the driving unit droplet, and it will also make it difficult to miniaturize the droplet ejection system

Method used

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  • Device and method for driving monodisperse micro-droplet to spray and solidify based on giant magnetostriction
  • Device and method for driving monodisperse micro-droplet to spray and solidify based on giant magnetostriction

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Embodiment 1

[0043] Such as Figure 1-2 As shown, the present invention provides a device based on giant magnetostrictive driven monodisperse micro-droplet ejection and solidification, comprising: an upper casing 22, a lower casing, and a giant magnetostrictive device placed above the upper casing 22 outside. The micro-displacement driver, the crucible 17 placed in the upper housing 22 and the particle collection area placed at the bottom of the lower housing, the crucible 17 is placed on the top of the particle collection area, and the giant magnetostrictive micro-displacement driver is located on the top of the crucible 17.

[0044] The crucible 17 is provided with a crucible cavity 28 for containing the melt 16; the crucible 17 is provided with a transmission rod 12 connected to the giant magnetostrictive driver, and the position where the transmission rod 12 is connected to the top of the crucible 17 is sealed by a dynamic sealing ring, and the transmission The lower end of the rod 12 ...

Embodiment 2

[0051] On the basis of embodiment 1, the present invention also provides a kind of method based on giant magnetostriction driven monodisperse droplet ejection and solidification, comprising the following steps:

[0052] S1, charging: put the metal material to be melted into the crucible cavity 28 of the crucible 17 in the upper housing 22 and then seal it; wherein, the amount of metal material loaded into the crucible cavity 28 is the crucible cavity 28 About two-thirds of the volume;

[0053] S2. Low vacuum and gas washing: Use the mechanical pump 25 and the diffusion pump 26 to vacuum the crucible 17, the upper casing 22 and the lower casing, turn on the mechanical pump 25 to pump low vacuum to below 5Pa, and fill it with high-purity inert protective gas , and then pumped to below 5Pa, this operation was repeated 3 times to ensure that the oxygen content in all shells was lower than 10ppm; vacuuming and scrubbing were to reduce the oxygen content and prevent the metal from h...

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Abstract

The invention provides a device and a method for driving a monodisperse micro-droplet to spray and solidify based on giant magnetostriction. The device comprises an upper shell, a lower shell, a giant magnetostrictive displacement driver arranged above the upper shell externally, a crucible arranged in the upper shell and a microparticle collecting area arranged at the bottom of the lower shell, the crucible is arranged in the upper part of the microparticle collecting area, and the giant magnetostrictive displacement driver is located in the upper part of the crucible. The method is based on a giant magnetostrictive principle. By means of unique performance of a giant magnetostrictive material, the giant magnetostrictive displacement driver is used for driving spraying of the micro-droplet to improve the stability, precision and spraying efficiency of a single droplet sprayed from a micropore, thereby generating a high-quality micron, even, ultra-micron particle meeting an industrial requirement.

Description

technical field [0001] The invention relates to a device and method for driving monodisperse micro-droplet ejection and solidification based on giant magnetostriction. Background technique [0002] As technology changes, the industry's demand for spherical metal particles is increasing day by day. Traditional particle preparation techniques such as atomization method, drop tube method, etc., the sprayed droplets have inconsistent flight trajectories and different thermal histories. Efficiency is greatly reduced. Especially when the size is strictly required, the atomization method is easy to produce satellite droplets, which will make the surface of the particles adhere to the satellite droplets, reduce the fluidity and spreadability of the particles, and cannot meet the industrial requirements for high-quality particles. [0003] In the droplet spraying preparation system of monodisperse particles, the driver can drive the transmission rod to generate a small longitudinal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/08
CPCB22F9/082B22F2009/0892
Inventor 许富民董伟李安平
Owner DALIAN UNIV OF TECH
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