Iron oxide Red
Iron oxide red, also known as ferric oxide, is a widely used red inorganic pigment. The following is a detailed description of iron oxide red:
1. physical properties
Color and Form: Red with reddish brown amorphous powder, no odor.
Solubility: insoluble in water, insoluble in organic acids and organic solvents, but soluble in inorganic acids.
Stability: stable to light, heat and air, stable to acid and alkali. It has no oil permeability and water permeability.
Other properties: there are α-type (positive magnetic) and γ-type (diamagnetic) two types. Dry production of products generally fineness below 1μm. The refractive index is 3.042, the melting point is 1550 ℃, and it decomposes at about 1565 ℃.
2. Application Areas
Because of its excellent tinting strength and stability, iron oxide red is widely used in many fields:
Building materials industry:
Mainly used for color cement, color cement floor tiles, color cement tiles, imitation glazed tiles, concrete floor tiles, color mortar, color asphalt, terrazzo, mosaic tiles, artificial marble and wall painting.
As a pigment or colorant, it is directly applied to indoor and outdoor colored concrete surfaces, such as walls, floors, etc.
Paints and paints:
Used in the manufacture of various paints, coatings and inks, such as water-based exterior wall coatings, powder coatings, etc.
Iron oxide red primer with anti-rust function, can replace the high-priced red Dan paint, saving non-ferrous metals.
Other industrial applications:
Rubber, plastics, leather and other industries are used as colorants and fillers to improve the wear resistance and aesthetics of products.
In the ceramic industry, it is used for hand-painted on the surface of the glaze layer and under the glaze, and can also be used as decal paper, silk screen printing, etc.
High-end iron oxide red used in precision hardware instruments, optical glass, gemstones and other polishing agent.
High purity iron oxide red is the main base material of powder metallurgy, which is used for smelting various magnetic alloys and other high-grade alloy steels.
Food and Cosmetics:
Edible iron oxide red is mainly used as a coloring agent in food, such as red bean rice, konjac flour, etc., which contains iron ions harmless to the human body.
In cosmetics, iron oxide red is mainly used for facial and eye cosmetics, such as foundation cream, powder, eye shadow, lipstick, nail polish, etc., which is also harmless to human body.
3. preservation and transportation
Preservation: iron oxide red in the preservation of the need to pay attention to avoid reacting with the acid and alkaline substances in the air, to keep the storage environment dry, and sealed preservation. It is recommended to choose kraft paper packaging or polyethylene plastic bag packaging to ensure the storage effect. At the same time, even iron oxide red stored under suitable conditions has a shelf life of three years, and long-term storage is not recommended.
Transportation: As iron oxide red belongs to explosive and dangerous goods, transportation should be carried out in strict accordance with the regulations on dangerous goods transportation, special distribution vehicles should be used, and dangerous goods information should be prompted.
4. Safety Precautions
Long-term inhalation of iron oxide dust may cause pneumoconiosis problems, such as "iron terminal disease" or "iron pneumoconiosis", so care should be taken during use and processing.
Iron oxide has resistance to current, but it can conduct electricity after absorbing water, which may become a dangerous factor in the use of electrical appliances. Attention should be paid to avoid direct contact with water.
In summary, iron oxide red is a red inorganic pigment with excellent performance and wide application. It plays an important role in many fields such as architecture, coatings, paints, rubber, plastics, ceramics, etc. At the same time, in the use and preservation process also need to pay attention to its safety and stability.
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