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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, paints and ointments. The zinc oxide powder is transparent, has a high energy band gap, and exhibits excellent light emission at 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. It becomes yellow upon heating, turns white after cooling and sublimates at 1800degC. The opacity 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.
Chemical properties of Zinc Oxide Powder
Zinc oxide powder This white pigment is commonly called zinc white. It has the advantage that ZnS, which is also white, does not turn black when exposed to H2S. ZnO changes gradually from white to lemon yellow when heated. As it cools down, the yellow disappears. It can be added to a paint to produce a paint that changes color or to a thermometer for a thermometer that changes color. 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 called wet 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 and oxidized.
Direct method Reaction equation:
C+O2=CO2
CO2+C=2CO
ZnO+CO=Zn (steam)+CO2
Zn (steam)+CO+O2=ZnO+CO2
Operation Method: In a proportion of 1:0.5 to 0.05, the roasted zinc powder (or zinc containing material) is combined with anthracite and limestone. After reduction at 1300degC and smelting, the zinc ore powder in the ore will be reduced to zinc vapor. This zinc vapor is then oxidized with air and captured as a final product.
3. Wet method
Zinc ash reacts with sulfuric to form zinc sulfate. This is then combined with ammonia and sodium carbonate to create 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, calcination and cooling. Zn(OH)2-ZnO+H2O
(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has over 12 years experience in providing high quality chemicals and nanomaterials. The Zinc oxide powder Please note that the products produced by our company are of high purity and have low impurities. Please. Contact us if necessary.
Physical properties of Zinc Oxide Powder
Appearance: white powder, hexagonal crystals. It is odorless, tastesless, and does not sand. It becomes yellow upon heating, turns white after cooling and sublimates at 1800degC. The opacity 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.
Chemical properties of Zinc Oxide Powder
Zinc oxide powder This white pigment is commonly called zinc white. It has the advantage that ZnS, which is also white, does not turn black when exposed to H2S. ZnO changes gradually from white to lemon yellow when heated. As it cools down, the yellow disappears. It can be added to a paint to produce a paint that changes color or to a thermometer for a thermometer that changes color. 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 called wet 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 and oxidized.
Direct method Reaction equation:
C+O2=CO2
CO2+C=2CO
ZnO+CO=Zn (steam)+CO2
Zn (steam)+CO+O2=ZnO+CO2
Operation Method: In a proportion of 1:0.5 to 0.05, the roasted zinc powder (or zinc containing material) is combined with anthracite and limestone. After reduction at 1300degC and smelting, the zinc ore powder in the ore will be reduced to zinc vapor. This zinc vapor is then oxidized with air and captured as a final product.
3. Wet method
Zinc ash reacts with sulfuric to form zinc sulfate. This is then combined with ammonia and sodium carbonate to create 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, calcination and cooling. Zn(OH)2-ZnO+H2O
(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has over 12 years experience in providing high quality chemicals and nanomaterials. The Zinc oxide powder Please note that the products produced by our company are of high purity and have low impurities. Please. Contact us if necessary.