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Method for detecting diameter-to-thickness ratio of flake alumina particles

A flaky alumina, detection method technology, applied in particle and sedimentation analysis, measuring device, particle size analysis and other directions, can solve the problems of complex operation method, long measurement time, extremely high testing skills, etc., to achieve the mastery of operation method, measurement Stable results and easy operation

Inactive Publication Date: 2016-03-16
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

This method requires extremely high testing skills of the operator, and the test results are greatly affected by humans.
The above methods

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  • Method for detecting diameter-to-thickness ratio of flake alumina particles
  • Method for detecting diameter-to-thickness ratio of flake alumina particles
  • Method for detecting diameter-to-thickness ratio of flake alumina particles

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Embodiment Construction

[0022] A method for detecting the diameter-thickness ratio of flaky alumina particles, the specific steps of which are as follows:

[0023] (1) Sample preparation

[0024] 1.1 The sample needs to be dispersed with absolute ethanol, and ultrasonicated on an ultrasonic cell pulverizer for 90 seconds. Use a small dropper to drop a few drops of the sample dilution on the electron microscope sample stage, and dry it for later use.

[0025] 1.2 Place the dried sample stage in the cavity of the ion sputtering instrument to carry out the ion sputtering gold spraying operation. The vacuum degree current is controlled at (0.6-0.8) mA, the sputtering current is controlled at (4-6) mA, Plating time is controlled at (4-6) min.

[0026] (2) Measurement steps

[0027] Place the sprayed sample on the sample holder of the scanning electron microscope, and observe the appearance of the single crystal particles clearly under the appropriate focal length and magnification according to the opera...

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Abstract

The invention relates to a method for detecting diameter-to-thickness ratio of flake alumina particles, which is characterized by orderly comprising steps during the detection process: (1) flake alumina is added into absolute ethyl alcohol, is dispersed and treated in ultrasonic waves through a ultrasonic cell disruptor; (2) a liquid is dropped onto an electron microscopy sample table after being treated through the ultrasonic waves, and is dried to do ion sputtering gold-plated operation by adopting an ion sputtering device; and (3) an electronic microscope photograph is obtained by adopting an electron scanning microscope, the particle size and the thickness of flake alumina particles is tested, and the diameter-to-thickness ratio of the flake alumina particles is counted. The flake alumina particles are put into the absolute ethyl alcohol, are fully suspended and dispersed, and are distributed on different angles, and vertical and transverse particles can be conveniently found during the measuring process to test thickness. The method for detecting the diameter-to-thickness ratio of the flake alumina particles is steady in testing result, excellent in repeatability and easy to master an operation method.

Description

technical field [0001] A method for detecting the diameter-thickness ratio of flaky alumina particles relates to a physical measurement and analysis of metal oxide particles, in particular a method for measuring the diameter-thickness ratio of flaky alumina particles. Background technique [0002] Flaky alumina is a variety of alumina obtained by processing aluminum hydroxide or metallurgical grade alumina through various processes. It is mainly used as filler and toughening agent for ceramic materials, aggregate or additive for refractory materials, and Pearlescent pigments in the jewelry processing industry are now gradually expanding to cosmetics, automotive paints and other industries to achieve the purpose of improving the physical properties of products. An important index to measure the physical properties of flaky alumina is the size of its particle diameter-thickness ratio. The particle diameter-thickness ratio refers to the ratio of the equivalent diameter and thi...

Claims

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Application Information

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IPC IPC(8): G01N15/02
Inventor 张文豪武福运赵合琴张素霞李尉芳曹俊真王艳霞苏明珠李景新王庆玲李德清
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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