Mainly still look at the following indicators:
1, whiteness, a very intuitive indicator, if you can take samples, you can compare each other, through visual comparison, it can be seen that the whiteness of different brands of products is different, for the precipitation of barium sulfate, the whiteness is more The quality is often better.
2, particle size distribution and particle shape, this indicator directly affects downstream manufactured products, such as in plastics or coatings, if the particle size distribution is uneven, it will cause uneven filling due to excessive particle size difference, affecting the overall performance of the product. . Of course, the shape of the particles will also have an effect. Generally speaking, the particle size distribution is uniform, and the influence of the particle shape depends on the specific product.
3. Dispersibility and oil absorption. Low oil absorption can save production costs, and the difficulty of dispersion also affects the quality of the product.
4. Impurity content, which contains many impurities in natural barium sulfate. Precipitated barium sulfate greatly reduces the content of impurities by artificial synthesis, but there are more or less mechanical impurities in the production process. Less is less likely to form mechanical black spots, and the quality is better.
5, fineness, although this indicator is not an indicator directly affecting the quality of barium sulfate, but it is the determinant of the value of barium sulfate. Generally speaking, the finer the precipitated barium sulfate, the more difficult it is to process, the higher its value. When it comes to nanoscale, its market prices vary greatly. Nano-scale precipitated barium sulfate is generally used in some high-end plastic ink coatings and other industries.