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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 has excellent light-emitting properties. 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
White powder, hexagonal crystals or white powder. It is odorless, tastesless, and does not sand. It becomes yellow upon heating, turns white after cooling and sublimates at 1800degC. The hiding power of this product is about half that for 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. Its main advantage is that ZnS, which is also white, does not 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 in medicine. 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 calcinated and decomposed to obtain the metal.
3. Zinc is made by melting zinc oxide at high temperatures and then oxidizing it.
4. This is obtained by oxidizing molten zinc.
5. Methods include indirect (also known the French method), direct (also the American method), or wet methods.
2. The indirect method.
Reaction equation: 2Zn+O2=2ZnO
Operation: The zinc oxide produced after cooling is collected using a cloth bag.
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), coke (or anthracite) and limestone are rolled into balls. After reduction at 1300degC and smelting, the zinc ore powder in the ore is reduced into zinc vapor. This zinc vapor is then oxidized with air and captured to get a final product of zinc dioxide.
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, drying, calcining, cooling, and grinding zinc hydroxide. Zn(OH)2-ZnO+H2O
(aka. Technology Co. Ltd., a global chemical material manufacturer and supplier with over 12 year’s 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
White powder, hexagonal crystals or white powder. It is odorless, tastesless, and does not sand. It becomes yellow upon heating, turns white after cooling and sublimates at 1800degC. The hiding power of this product is about half that for 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. Its main advantage is that ZnS, which is also white, does not 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 in medicine. 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 calcinated and decomposed to obtain the metal.
3. Zinc is made by melting zinc oxide at high temperatures and then oxidizing it.
4. This is obtained by oxidizing molten zinc.
5. Methods include indirect (also known the French method), direct (also the American method), or wet methods.
2. The indirect method.
Reaction equation: 2Zn+O2=2ZnO
Operation: The zinc oxide produced after cooling is collected using a cloth bag.
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), coke (or anthracite) and limestone are rolled into balls. After reduction at 1300degC and smelting, the zinc ore powder in the ore is reduced into zinc vapor. This zinc vapor is then oxidized with air and captured to get a final product of zinc dioxide.
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, drying, calcining, cooling, and grinding zinc hydroxide. Zn(OH)2-ZnO+H2O
(aka. Technology Co. Ltd., a global chemical material manufacturer and supplier with over 12 year’s 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.