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Characteristics and application range of different iron oxide pigments
2024-05-13 16:00:49
Iron oxide pigment is a kind of important inorganic pigments widely used in all walks of life, because of its bright color, good stability, non-toxic and harmless advantages and favored. Depending on different iron oxide forms and production processes, these pigments present a rich variety of colors and characteristics.
Iron oxide pigments mainly include iron yellow, iron red, iron brown, iron black, as well as transparent and translucent iron oxide pigments. Due to non-toxic, non-seepage, strong coloring, low production cost, and can be adjusted into a variety of different colors and other characteristics, it is widely used in paint, plastic rubber and ink and other industries.
Among them, the amount of iron red is the largest. Iron red has good heat resistance, does not change color at 500℃, and does not change the chemical structure at 1200℃, which is very stable. Iron oxide pigments have excellent acid and alkali resistance, water resistance, solvent resistance and weather resistance, but also can absorb the UV spectrum in the sun, so it has a very good protective effect on the coating.This article will discuss several common iron oxide pigments and their characteristics and application range.
Iron red particle size at 0.2μm with yellow phase, specific surface area, oil absorption is also large, when the particle size increases the hue from the red phase purple move, specific surface area, oil absorption also becomes smaller.
Iron oxide red pigment can be used as a colorant in various rubber, plastic, construction, paint and other industries. When using iron red, its good coloring ability, hiding power and stable chemical properties are used to improve the physical and chemical properties of the colorant.
Its bright red color makes it an ideal colorant for concrete, bricks, and ceramics. In addition, iron oxide red is also used in the production of anti-rust paints, because it can effectively prevent the oxidation of metal surfaces.
Iron yellow and iron red have good light resistance, solvent resistance, alkali resistance, resistance to dilute acid and other characteristics, its heat resistance is slightly worse, in the heat treatment, easy to lose crystalline water and red phase transition, so can not be applied to the high temperature environment.
Synthetic iron oxide yellow coloring force is high, bright color, according to the need to produce a variety of hue of iron yellow, abrasive is also good, with the role of shielding UV radiation, can extend the application life of the coating. Also because of its low price, iron oxide yellow can be combined with stable phthalocyanine blue and iron blue to form green, and iron red and iron black to form brown.
Iron oxide yellow pigment is used as pigment or colorant in all kinds of concrete preforms and building products materials, which can be directly applied to cement, and is often used in the coloring of plastic products.
Iron oxide brown and iron oxide black
Iron oxide brown, iron black and natural iron brown often contain carbon, manganese oxide and other doping substances. The synthetic product is a mixture of iron oxide black, iron red and iron yellow, which has high coloring power and hiding power.
Iron brown can absorb almost all the ultraviolet spectrum, so the camouflage coating made of iron brown has the same infrared reflection as trees, grass, sand, etc., so that the infrared photography in the air can not determine the camouflage. Iron black can also be used to prepare primer, used in vehicles, transportation equipment metal base, easy to grind than carbon black.
Conclusion
The reason why the application range of iron oxide pigments is so extensive, in addition to its excellent physical and chemical properties, but also lies in its environmental protection and economy. As non-toxic and harmless inorganic pigments, iron oxide pigments meet the requirements of modern society for environmental protection and health, and its production cost is relatively low, suitable for large-scale industrial applications.
In general, the status of iron oxide pigments in modern industry can not be ignored. Iron oxide pigments play an important role in construction, transportation, plastics, rubber, art and food. With the progress of science and technology and the continuous improvement of production technology, the application prospect of iron oxide pigments will be broader, helping all walks of life to achieve higher quality and more environmentally friendly product manufacturing.