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Yuan Lei's Little Knowledge | Use of Barium Sulfate

Release time:

2024-01-29 09:34

Barium sulfate is based on barite as the main raw material, through beneficiation, ore washing, crushing and other processes. Barium sulfate has a hardness of 3~3.5 (Mohs) and a specific gravity of 4.3~4.7. It has the characteristics of high specific gravity, low hardness and brittleness. Barite is almost insoluble in water, ethanol and acid, soluble in hot concentrated sulfuric acid. With the development of some high-performance barium sulfate products, the application field of barium sulfate is constantly expanding.

 

 

At present, barium sulfate is widely used and the industries with large demand are as follows:

1. The application of barium sulfate in paint is superior to most other filling powders. It has the characteristics of low cohesion, low light dispersion and fine particles. It is especially suitable for pigment topcoat, varnish, spray paint, etc., with chemical resistance and weather resistance. Its inert, insoluble in water, acid, alkali and other organic intermediary, excellent gloss and particle fineness makes the long-term exposure of the topcoat to be maintained. Barium sulfate is recommended for topcoats to increase surface hardness and color stability.

Barium sulfate has high filling and can be applied to all coating series, such as primers, thick paste coatings and other types. Its low specific surface area, particle size distribution and easy fluidity make barium sulfate have low abrasion during processing. Barium sulfate is recommended for automatic primer surface layer, and even high filling also maintains good uniformity and smoothness.

2. Barium sulfate is used in latex paint, which is called "acid-resistant" latex paint. Acid resistance even when exposed. The chemical properties of barium sulfate can be increased by its easy dispersion, optical retention and easy fluidity.

3, barium sulfate for powder coating can improve its gloss, fluidity, filling and compatibility with various pigments.

4. In the application of pigments, barium sulfate is used as a gasket for titanium dioxide and pigments in plastics, which can reduce the addition of pigments and save about 10% of the cost. Light reflection can maintain the integrity of pigments.

5, barium sulfate in silicone rubber, mixed rubber, as a filler, can increase the hardness of silicone rubber, reduce its elasticity.

6. In the application of printing ink, the low abrasion, high gloss and color stability, low cohesion, combined with its easy fluidity, make it suitable for high quality printing ink.

7. Barium sulfate is used in the production of paper coatings. The introduction can increase its gloss and fluidity, such as art paper and medium-white transparent color paper. The titanium dioxide part can be replaced by double barium sulfate without losing its gloss.

8, barium sulfate is particularly suitable for elastomers, which does not contain any heavy metal pollution or rubber gas, so it is particularly suitable for food and drugs, and can provide its stability and anti-aging performance.

9. In the application of thermoplastics, the thermal conductivity and fluidity of barium sulfate can reduce the time of injection molding, and barium sulfate can be used as a nucleating agent to improve its strength and thermal stability.

In general, barium sulfate is widely used in coatings as an extender pigment, which plays an important role in improving the thickness, wear resistance, water resistance, heat resistance, surface hardness and impact resistance of the coating film. Used as titanium dioxide and pigment in plastic gasket can reduce the amount of pigment added and can save about 10% of the cost. Barium sulfate can reach a filling rate of 80% of its weight. It can be applied to drain pipes, sound boxes and acoustics to effectively isolate noise and noise. Barium sulfate N can be applied to curtains to increase weight. It can provide the advantages of high gloss, good hue, scratch resistance, good dimensional stability, etc.

Barium sulfate, pigment, flowability, for, application, filling, with, hardness, reduction

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The appearance of precipitated barium sulfate is a white amorphous powder, with a relative density of 4.50 (15 ℃) and a melting point of 1580 ℃. Due to its high refractive index (1.63-1.65), it exhibits a relatively white color and a certain degree of covering power. It is almost insoluble in water, ethanol, and acid, soluble in hot sulfuric acid. It is easy to form mixed crystals with potassium permanganate, calcium carbonate, or metal nitrates, and can be reduced to barium sulfide with carbon at high temperatures.

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