Corrosive for displaying sintering ferrite microstructure and application of corrosive

A technology of microstructure and corrosive agent, which is applied in the field of ferrite microstructure observation, can solve the problems of great threat to operators' health, high toxicity and high volatility of hydrofluoric acid, etc., and achieves convenient and fast preparation process and simple raw materials. Easy to obtain, high practical value effect

Active Publication Date: 2018-06-26
北矿磁材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high toxicity and high volatility of hydrofluoric acid itself, it poses a great threat to the health of operators, so there are strict requirements on the operation process, operators, and operating sites

Method used

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  • Corrosive for displaying sintering ferrite microstructure and application of corrosive
  • Corrosive for displaying sintering ferrite microstructure and application of corrosive
  • Corrosive for displaying sintering ferrite microstructure and application of corrosive

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A corrosion agent showing the microstructure of sintered ferrite, which comprises hydrochloric acid, stannous chloride and deionized water with a concentration of 37% (mass fraction), and the hydrochloric acid and deionized water are configured according to the volume ratio of 1:1 Configure, the final concentration of hydrochloric acid in the etchant is 18% (mass fraction), the final concentration of stannous chloride in the etchant is 10% (mass fraction), stir evenly, and corrode the sample at room temperature. Immerse the sintered ferrite sample after mechanical grinding and mechanical polishing in the etchant for 10 minutes. After the surface of the sample becomes gray and dark, wash it with water and then with absolute ethanol. After drying with a hair dryer, observe it with a metallographic microscope , so as to get figure 1 The metallographic photograph shown; by figure 1 It can be seen that the microstructure of the sintered ferrite sample is clear and easy to m...

Embodiment 2

[0030] A corrosion agent showing the microstructure of sintered ferrite, which comprises the configuration of hydrochloric acid, stannous chloride and deionized water with a concentration of 30% (mass fraction), and the hydrochloric acid and deionized water are in a volume ratio of 1:1 For configuration, the final concentration of hydrochloric acid in the etchant is 15% (mass fraction), the final concentration of stannous chloride in the etchant is 10% (mass fraction), stir evenly, and corrode the sample at room temperature. Immerse the sintered ferrite sample after mechanical grinding and mechanical polishing in the etchant for 20 minutes. After the surface of the sample becomes gray and dark, wash it with water and then with absolute ethanol. After drying with a hair dryer, observe it with a metallographic microscope , so as to get figure 2 The metallographic photograph shown; by figure 2 It can be seen that the microstructure of the sintered ferrite sample is clear and e...

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Abstract

The invention discloses a corrosive for displaying the sintering ferrite microstructure and application of the corrosive, the corrosive comprises hydrochloric acid, stannous chloride and deionized water, the hydrochloric acid concentration of the corrosive is 15%-18% (mass fraction), and the stannous chloride concentration is 8%-10% (mass fraction); the corrosive is prepared from the hydrochloricacid with the concentration being 30%-37% (mass fraction), the stannous chloride and the deionized water. Display of the sintering ferrite microstructure by the corrosive comprises the following stepsthat sintering ferrite samples are subjected to mechanical grinding and mechanical polishing sequentially, the sintering ferrite samples are soaked into the corrosive under the room temperature condition, and the sintering ferrite microstructure can be clearly displayed under a microscope after corrosion. The sintering ferrite samples can be corroded under the room temperature condition by the corrosive, the microstructure is clear, and the grain boundary is obvious; beside, compared with the traditional hydrofluoric acid system, the corrosive is low in toxicity and environment-friendly, andthe display application of the corrosive is simple, convenient, rapid and effective.

Description

technical field [0001] The invention relates to the technical field of ferrite microstructure observation, in particular to an etchant for displaying the microstructure of sintered ferrite and the application of the etchant for displaying the microstructure of sintered ferrite. Background technique [0002] Ferrite is a common basic magnetic material, which is widely used in various devices that provide permanent magnetic fields. The macroscopic properties of ferrite are closely related to its microstructure. Therefore, if its microstructure can be clearly displayed and parameters such as grain size and orientation can be accurately measured, it will play a role in improving the process and product quality. to an important role. [0003] Ferrite itself has a stable chemical structure and is difficult to be corroded. Therefore, hydrofluoric acid or a chemical containing hydrofluoric acid is usually used as an etchant to display the microstructure of ferrite. However, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N1/28G01N1/32
CPCG01N1/286G01N1/32G01N21/84G01N2001/2866
Inventor 全小康李清华葛恒波胡国辉熊君魏汉中黄可淼贾立颖王倩朱代漫揣丹周小文王常蕾王永齐刘辉刘荣明李炳山
Owner 北矿磁材科技有限公司
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