What is Zinc Oxide?
Zinc oxide is an inorganic compound with the formula ZnO. ZnO is a water-insoluble white powder as an amphoteric oxide. Although it occurs naturally as the mineral zincite, most zinc oxide is produced synthetically.
ZnO is a wide-bandgap semiconductor of the II-VI semiconductor group. The natural contribution of the semiconductor, due to oxygen vacancies or zinc transitions, is n-type. Zinc oxide is well permeable, has high electron mobility and wide band gap, and is strongly luminescent at room temperature. Thanks to these features, it is widely used in many emerging technologies and industries.
Pure ZnO is a white powder, but occurs in nature as the rare mineral zincite, which often contains manganese and other yellow-to-red impurities. Crystalline zinc oxide is thermochromic, changing from white to yellow when heated in air and turns white when cooled. This color change is caused by a small loss of oxygen to the environment at high temperatures.
Zinc oxide is used in many different industries. The reactivity of the oxide is used in many areas as a precursor to other zinc compounds. For materials science applications, zinc oxide has high refractive index, high thermal conductivity, bonding, antibacterial and UV protection properties. Zinc oxide is added as an additive to materials and products, including plastics, ceramics, glass, cement, rubber, lubricants, paints, ointments, adhesives, sealants, concrete manufacturing, pigments, foods, batteries, ferrites, fire retardants.
How is Zinc Oxide produced?
First, it is the version called the indirect or french method. The metallic zinc is melted in a graphite crucible and evaporated at temperatures above 907 °C. Zinc vapor reacts with oxygen in the air to give ZnO. This is the most common method used to produce zinc oxide worldwide.
In the direct or American process, it starts with various contaminated zinc composites such as zinc ores or smelting by-products. Zinc precursors are reduced by heating with a carbon source such as anthracite to produce zinc vapor, which is then oxidized as in the indirect process.
White powdered zinc oxide can be produced in the laboratory by electrolysis of a sodium bicarbonate solution with a zinc anode. First, zinc hydroxide and hydrogen gas are produced. Then, when the zinc hydroxide is heated, it decomposes into zinc oxide.
What does Zinc Oxide look like?
White color, odorless and in powder form
What is the molecular formula of Zinc Oxide?
Molecular Formula: ZnO
In which sectors is Zinc Oxide used?
- Rubber and ceramic industry
- natural gas industry
- metal industry
- window coverings
- outdoor applications
- Paint pigmentation
- Pharmaceutical and personal care industry
- food industry
- cigarette industry
- UV Rays Filter
What are the Zinc Oxide usage areas (processes)?
- % 50 to % 60 of ZnO use is in the rubber industry. Zinc oxide is used together with stearic acid in the vulcanization of rubber. The ZnO additive also protects the rubber from fungi and UV light.
- Zinc oxide is used in ceramic glazing and frit compositions in the ceramic industry.
- Zinc oxide is used as a pretreatment to remove hydrogen sulfide (H2S) from natural gas.
- Zinc oxide, which is depleted in the zinc isotope with atomic mass 64, is used to prevent corrosion in nuclear pressurized water reactors.
- Paints containing zinc oxide powder are used as an anticorrosive coating for metals and especially galvanized iron.
- Zinc oxide is used as a coating on some windows. Depending on which side of the window the cladding is on, it not only saves energy by reflecting infrared rays back into the room, but also provides heat protection by not allowing the rays to enter the room.
- Plastics such as polyethylene naphthalate (PEN) can be protected by applying a zinc oxide coating. The coating reduces oxygen diffusion with PEN.
- Zinc oxide layers can also be used on polycarbonate in outdoor applications. The coating protects the polycarbonate from sunlight and reduces its oxidation rate and yellowing due to light.
- Zinc white is used as a pigment in paints and is more opaque than lithocope but less opaque than titanium dioxide.
- It is used in paper coatings because of its white pigment.
- It is used as the main component of mineral makeup.
- Zinc oxide provides strong protection against UVA and UVB ultraviolet rays. Therefore, in sun lotions; It is used in UV-blocking glasses and welding glasses that can be used in space.
- Zinc oxide is added to many food products, including breakfast cereals, as a source of zinc, an essential nutrient.
- Zinc oxide is a component of cigarette filters.
- Zinc oxide has many uses in the pharmaceutical industry. It is widely used in powders to relieve atopic dermatitis, contact dermatitis, eczema-induced itching, diaper-induced skin itching, and in the treatment of various skin diseases such as acne.
- Zinc oxide is used in mouthwash products and toothpastes as an antibacterial agent recommended to prevent plaque and tartar formation and control bad breath by reducing volatile gases and volatile sulfur compounds (VSC) in the mouth.
- Zinc oxide has deodorizing and antibacterial properties and is added to cotton fabric, rubber, oral care products and food packaging.
What is the Zinc Oxide Sales Price?
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Where Can You Buy Zinc Oxide?
As SoleChem Kimya, we sell and supply zinc oxide.