Method for preparing magnetic material sample for observation by transmission electron microscope
A technology of electron microscopy and magnetic materials, applied in the direction of instruments, scanning probe technology, etc., can solve the problems of complex and cumbersome sample preparation process, inability to guarantee the integrity of the coating, curling and damage of the coating, and achieve the effect of wide application prospects
Active Publication Date: 2018-09-04
SHANDONG UNIV
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Problems solved by technology
This invention is only a method for preparing magnetic liquid transmission electron microscope observation samples in a magnetic field. It is only applicable to specific liquid magnetic samples, and the sample preparation process is complicated and cumbersome. membrane integrity
[0004] In order to overcome the disadvantages of double-connected copper mesh for the observation of magnetic material samples under the transmission electron microscope, the sample preparation is troublesome and the sample dispersion is not good, and the magnetic powder with large particles will be attracted to the pole piece of the objective lens to cause permanent pollution of the electron microscope. and other problems, the present invention is proposed
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[0007] Technical scheme of the present invention is as follows:
[0008] A preparation method for observing a magnetic material sample with a transmission electron microscope, comprising the steps of:
[0009] (1) Pulverize the dried magnetic material, place it in a dispersant, disperse it with ultrasonic waves, suck out the dispersed magnetic material liquid with a dropper and drop it on the support film, place it in an infrared lamp and dry it to prepare a support film sample;
[0010] (2) Weigh 50-60 parts of methacrylate, 30-40 parts of toluene, 6-10 parts of cellosolve acetate, and 1-5 parts of deblocking agent according to parts by weight, and mix them uniformly to prepare an organic acrylic solution;
[0011] (3) Use a dropper to suck out the acrylic organic solution prepared in step (2), drop it on the support film sample in step (1), and place it under an infrared lamp to bake and fix it to obtain a sample that can be used to observe magnetic materials with a transmis...
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The present invention relates to a method for preparing a magnetic material sample for observation by a transmission electron microscope. The high light transmittance property of acrylic is used to carry out post-process on a magnetic material prepared by a wet method, and a magnetic material which can be observed by a common transmission electron microscope is prepared. A support film of the magnetic material prepared by the wet method is uniformly covered with a layer of acrylic film, thus the magnetic material is evenly distributed in the high-transparency acrylic film to achieve the purpose of fixing the magnetic material, the problem that the magnetic material is absorbed into the interior of the electron microscope caused by the damage of a duplex copper mesh is solved, the preparation process is simple and easy to learn, the test of the magnetic material can be completed with an ordinary pure carbon film, the observation cost of the magnetic material is greatly reduced, and method has a broad application prospect.
Description
technical field [0001] The invention relates to a preparation method for observing magnetic material samples with a transmission electron microscope, and belongs to the technical field of application of the transmission electron microscope. Background technique [0002] Magnetic materials refer to substances that can directly or indirectly generate magnetism from transition elements such as iron, cobalt, nickel and their alloys. Magnetic materials can be divided into soft magnetic materials and hard magnetic materials according to the difficulty of demagnetization after magnetization. Magnetic materials have magnetically ordered strong magnetic substances, and in a broad sense also include weak magnetic and antiferromagnetic substances that can apply their magnetic properties and magnetic effects. Magnetism is a fundamental property of matter. Substances can be classified into diamagnetic, paramagnetic, ferromagnetic, antiferromagnetic and ferrimagnetic substances accordin...
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Login to View More IPC IPC(8): G01Q30/20
CPCG01Q30/20
Inventor 王春省封振宇杜娜王川李正平韩艳阳
Owner SHANDONG UNIV