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Zinc oxide powder
Zinc oxide powder
The chemical formula for zinc oxide is ZnO. Water is not soluble, but it dissolves in acid and strong alkali. Zinc dioxide powder is an additive widely used by chemical manufacturers. It can be found in plastics and silicate products as well as synthetic rubber, lubricants paints ointments adhesives food, batteries flame retardants. The zinc oxide powder is transparent, has a high energy band gap, possesses a high exciton-binding energy, and emits light at optimum room temperature. It’s used in liquid-crystal displays, thin film transistors, light emitting diodes and other semiconductor products. As a nanomaterial, micro-particles of zinc oxide have also started to play a significant role in related fields.
Physical properties of Zinc Oxide Powder
Appearance: white powder, hexagonal crystals. It is odorless, tastesless, and does not sand. When heated up to 1800degC, it sublimates and turns white. The masking power is about half of that of zinc sulfide or titanium dioxide. The tinting strength of basic lead is two times that of titanium dioxide.
Solubility : soluble with acid, concentrated alkali, ammonia, and ammonium-salt solution. Insoluble with water and ethanol.
Zinc oxide powder chemical properties
Zinc oxide powder This white pigment is commonly called zinc white. It is white, so it doesn’t turn black when exposed to H2S. ZnO changes gradually from white to light to lemon yellow when heated. As it cools down, the yellow disappears. It can be added to paints or thermometers to produce color-changing paints or thermometers. ZnO, which has an astringent quality and a certain bactericidal property, is commonly used as ointment. ZnO may also be used to create catalysts.
Preparation of Zinc Oxide Powder
1. Direct method
1. You can get it by calcining Zinc Carbonate. ZnCO3=ZnO+CO2|
2. The zinc hydroxide is calcined and decomposed to obtain the metal.
3. Zinc is made by melting zinc oxide at high temperatures and oxidizing it with air.
4. This is obtained by oxidizing molten zinc.
5. Methods include indirect (also called French method) utilizing zinc ingots, direct (also known American method) utilizing zinc ore and wet (also known as American method).
2. The indirect method.
Reaction equation: 2Zn+O2=2ZnO
Operation: The zinc ingot produced by electrolysis is heated to 600700°C to melt. It is then placed in a high-temperature resistant pot, melted and vaporized at a temperature of 13001400°C, introduced hot air for oxidation, and finally the zinc dioxide is cooled.
Direct method Reaction equation:
C+O2=CO2
CO2+C=2CO
ZnO+CO=Zn (steam)+CO2
Zn (steam)+CO+O2=ZnO+CO2
Method: In a proportion of 1:0.5 to 0.05, the roasted zinc powder (or zinc containing material), coke (or anthracite) and limestone are rolled into balls. After reduction at 1300degC and smelting, the zinc ore powder in the ore pellet is reduced into zinc vapor. This zinc vapor is then oxidized with air and captured as a final product.
3. Wet method
Zinc sulfate can be prepared by reacting zinc-ash with sulfuric acid. It is then combined with ammonia and sodium carbonate to form zinc oxide. The reaction is described by the following equation:
Zn+H2SO4=ZnSO4+H2|
ZnSO4+Na2CO3=ZnCO3|+Na2SO4
ZnSO4+2NH3*H2O=Zn(OH)2|+(NH4)2SO4
The product is made from zinc carbonate. zinc oxide is obtained by washing and drying. ZnCO3-ZnO+CO2|
The zinc oxide product is made by washing, precipitation and drying the zinc hydroxide, followed by calcination, cooling and pulverization. Zn(OH)2-ZnO+H2O
(aka. Technology Co. Ltd., a trusted global chemical supplier and manufacturer has over 12 years experience in providing super-high-quality chemicals. The Zinc oxide powder Please note that the products produced by our company are of high purity and have low impurity. Please. Contact us if necessary.
Physical properties of Zinc Oxide Powder
Appearance: white powder, hexagonal crystals. It is odorless, tastesless, and does not sand. When heated up to 1800degC, it sublimates and turns white. The masking power is about half of that of zinc sulfide or titanium dioxide. The tinting strength of basic lead is two times that of titanium dioxide.
Solubility : soluble with acid, concentrated alkali, ammonia, and ammonium-salt solution. Insoluble with water and ethanol.
Zinc oxide powder chemical properties
Zinc oxide powder This white pigment is commonly called zinc white. It is white, so it doesn’t turn black when exposed to H2S. ZnO changes gradually from white to light to lemon yellow when heated. As it cools down, the yellow disappears. It can be added to paints or thermometers to produce color-changing paints or thermometers. ZnO, which has an astringent quality and a certain bactericidal property, is commonly used as ointment. ZnO may also be used to create catalysts.
Preparation of Zinc Oxide Powder
1. Direct method
1. You can get it by calcining Zinc Carbonate. ZnCO3=ZnO+CO2|
2. The zinc hydroxide is calcined and decomposed to obtain the metal.
3. Zinc is made by melting zinc oxide at high temperatures and oxidizing it with air.
4. This is obtained by oxidizing molten zinc.
5. Methods include indirect (also called French method) utilizing zinc ingots, direct (also known American method) utilizing zinc ore and wet (also known as American method).
2. The indirect method.
Reaction equation: 2Zn+O2=2ZnO
Operation: The zinc ingot produced by electrolysis is heated to 600700°C to melt. It is then placed in a high-temperature resistant pot, melted and vaporized at a temperature of 13001400°C, introduced hot air for oxidation, and finally the zinc dioxide is cooled.
Direct method Reaction equation:
C+O2=CO2
CO2+C=2CO
ZnO+CO=Zn (steam)+CO2
Zn (steam)+CO+O2=ZnO+CO2
Method: In a proportion of 1:0.5 to 0.05, the roasted zinc powder (or zinc containing material), coke (or anthracite) and limestone are rolled into balls. After reduction at 1300degC and smelting, the zinc ore powder in the ore pellet is reduced into zinc vapor. This zinc vapor is then oxidized with air and captured as a final product.
3. Wet method
Zinc sulfate can be prepared by reacting zinc-ash with sulfuric acid. It is then combined with ammonia and sodium carbonate to form zinc oxide. The reaction is described by the following equation:
Zn+H2SO4=ZnSO4+H2|
ZnSO4+Na2CO3=ZnCO3|+Na2SO4
ZnSO4+2NH3*H2O=Zn(OH)2|+(NH4)2SO4
The product is made from zinc carbonate. zinc oxide is obtained by washing and drying. ZnCO3-ZnO+CO2|
The zinc oxide product is made by washing, precipitation and drying the zinc hydroxide, followed by calcination, cooling and pulverization. Zn(OH)2-ZnO+H2O
(aka. Technology Co. Ltd., a trusted global chemical supplier and manufacturer has over 12 years experience in providing super-high-quality chemicals. The Zinc oxide powder Please note that the products produced by our company are of high purity and have low impurity. Please. Contact us if necessary.