As we all know, aluminum oxide polishing fluid, as a metallographic polishing agent, is widely used. Users often ask me for aluminum oxide polishing fluid μ 0.3 of m μ M or 0.05 μ M's, when I asked him: Do you need reunited or non reunited? Or sol-gel type? At this moment, the other party mostly looked puzzled, why? Alas, many people are not aware that alumina polishing fluids need to be classified into different types, and different types have differences in application. Incorrect use not only affects the polishing effect, but may also increase the cost of sample preparation.


The editor will provide a brief explanation to help friends engaged in metallographic analysis better choose this metallographic polishing agent. Take the aluminum oxide polishing solution imported from QMAXIS in the United States as an example to illustrate.


Alumina polishing solutions are usually divided into three types:

1. Universal:

Universal aluminum oxide polishing liquid, in the form of sol gel suspension liquid. The particle size of alumina abrasive is 0.05µ m. Its acidity and alkalinity are neutral, with a pH value of 7. This kind of alumina polishing liquid is very suitable for fine polishing of minerals, Ferrous, low melting point alloys, carbides, printed circuit boards, precious metals and electronic components. The scope of application is broad and the application is universal, therefore, what people usually do not distinguish is this.

2. Agglomeration type:


Agglomerated alumina polishing solution is also a suspended liquid. The particle size of alumina abrasive is 1 μ m. 0.3 μ M and 0.05 μ The agglomerated abrasive structure of various models such as M determines that it has a higher removal rate compared to ordinary alumina polishing solutions with the same particle size. The polishing efficiency is relatively higher, but its performance is more suitable for fine polishing of magnesium, lead and their alloys. When applied to the preparation of these types of material samples, its performance will be better.

3. Non aggregated type


Non agglomerated alumina polishing fluid is also a suspended liquid. The particle size of alumina abrasive is 1 μ m. 0.3 μ M and 0.05 μ Multiple models such as M have slightly weaker removal efficiency compared to agglomerated alumina polishing solutions, but have better performance in polishing the surface of the sample. Therefore, it is more suitable for fine polishing of most mineral and metal material samples.

The above is a brief explanation of different types of alumina polishing fluids and their applications. When choosing alumina polishing fluids, it can serve as a reference. If you still have questions about your specific selection, you can contact the application engineer of Kemai Testing to provide professional services and help you easily prepare samples.