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    Introduction and preparation method of zinc oxide

    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 exciton-binding energy and an energy band gap of a lot. It emits light well 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
    White powder, hexagonal crystals or white powder. It is odorless, tastesless and non-sandy. It becomes yellow upon heating, turns white after cooling and sublimates on reaching 1800degC. The concealing ability 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, ammonium chloride solution and water. Insoluble with ethanol 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 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 calcinated 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
    After melting the electrolyzed ingot of zinc, it is placed in a high-temperature resistant pot, where it is made to melt and vaporize. Hot air is then introduced to oxidize the product.
    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 formed into balls. After reduction at 1300degC and smelting, the zinc ore powder in the ore powder becomes zinc vapor. This zinc vapor is then oxidized and captured to produce a zinc oxide finished 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, precipitation drying, 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 high-quality nanomaterials and chemicals. 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.

    2023-08-01

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    Zinc Sulfide Overview and its properties

    Zinc Sulfide Zinc sulfide The chemical formula for ZnS is ZnS. Its molar weight is 97.47g/mol. ZnS's chemical structure is very simple. It consists of zinc metal attached through a polar, covalent bond to a sulfur. It is the most common form of zinc in nature. Sphalerite is its main mineral. This mineral, although usually black due to impurities, is actually white and is widely used in pigments. Zinc sulfide is transparent in its dense synthetic forms. It can also be used to make windows for optical devices that use visible light and infrared light. Zinc Sulfide appears yellowish white powder in liquid. It is not soluble in liquid water and is denser. The main hazard to the environment. To limit the spread in the environment, immediate action should be taken. It is easily absorbed by the soil, contaminating nearby groundwater and waterways.
    There are two crystal forms of solid zinc sulfide, alpha and beta, which have hexagonal (wurtzite), respectively, and cubic (sphalerite) structures. Beta crystalline ZnS (sphalerite), the more stable, is found in beta crystalline form.
    Zinc sulfide Occurrence:
    Zinc sulfide It is found in nature as zinc blende (also called sphalerite), which is a mix of iron and Zinc sulfides. In nature, zinc dioxide is found in the form of "zincite." In fluorescence light energy is absorbed then rapidly reemitted. The phosphorescence of zinc sulfide is visible after the UV light has been turned off.

    Zinc sulfide Preparation:
    Zinc Sulfide may be produced by a number of simple reactions. For example, zinc sulfate is prepared either by reacting with sodium sulfur (Na2S), zinc sulfate, (ZnSO4), or passing hydrogen sulfide into an aqueous salt solution to precipitate insoluble ZnS. The insoluble ZnS can be prepared by reacting the zinc oxide with hydrogen sulfur:
    ZnS + ZnO - ZnO + H2S
    Zinc Sulfide Physical Property:
    Zinc Sulfide can be found in two distinct crystal forms. The wurtzite is white or yellowish white, while sphalerite is greyish white. It has a mass density of 4.09g/mL and a melting temperature of 1.185 degC.
    Zinc Sulfide Chemical Property:
    Zinc Sulfide Is Insoluble in Water It breaks down in the presence strong acids and oxidizing agents. When heated to temperatures greater than 900 degrees Celsius, it releases sulfur and zinc fumes. It also reacts strongly acidic solutions, releasing hydrogen-sulfide. At 102 degrees Celsius, the beta-crystalline ZnS material (sphalerite), a stable form, transforms into its alpha-crystalline form (wurtzite). ZnS is a phosphorescent material that glows when exposed to UV light.
    Zinc sulfide Uses:
    Zinc Sulfide is used in many applications because of its luminescent quality. It is used to make electroluminescent and phosphorescent materials. Zinc Sulfide, also known as zinc sulfide, is used for optical lenses and windows, infrared optics, and as a pigment. It's also a wide bandgap semiconductor, and an effective photo catalyser.
    The most common usage of ZnS As a pigment in paints, rubbers, and plastics. Lithopone (a mixture of ZnS, barium, and sulfate) is widely used as a pigment in low-gloss enamels. ZnS can be used for a variety of electronic and decorative uses because it is phosphorescent.
    Zinc sulfide hazards:
    Zinc Sulfide exposure is not harmful to humans. It mainly causes irritations of the respiratory tract, skin and eyes. This is a serious environment hazard because it is highly toxic for aquatic organisms.

    (aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has over 12 years experience in providing super-high-quality chemicals and nanomaterials. The Zinc Sulfide powder Please note that the products produced by our company are of high purity and have low impurity. Please. Contact Us if necessary.

    2023-07-20

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    Characteristics of water-based zinc stearate emulsion for coating

    How do you define it? Emulsion of zinc stearate Zinc Stearate is fine, white, light-colored powder. It can dissolve in water and ethanol but not in ether. When zinc stearate has been heated, it is dissolved in an organosolvent. After it has cooled it turns into a gel-like substance. It can be broken down by strong acids, which are lubricity and moisture absorption.
    Hydrophilic water-based zincstearate-emulsion is a type of hydrophilic zinc-stearate-emulsion made from zinc-stearate and various coactive agents. It's used especially in water-based wood, paint, rubber, polishing material and other products.
    Property of the water-based Zinc Stearate Emulsion
    This product is white in appearance, contains no harmful chemicals, meets the environmental protection standards, and has no pollution. The product is very easy to mix in water. It has superfineness and good water dispersion. You can easily defoam it, as it has fine lubrication.

    Methods of packing and storage
    1. Keep the container closed.
    2. Keep it out of direct sunlight.
    3 Winter must prevent freezing demulsification.
    4. You should not stack it with strong acid or alkaline substances to prevent chemical reactions between the acid alkali liquid leakage and zinc Stearate that can affect stability.
    5. In long-term storage, this product might be slightly precipitated. The use of the product will not be affected if it is stirred well prior to use.
    6. Packaging 200L can be made to customer's specifications. Insulation measures should be taken during transportation.
    Emulsions containing water-based zinc stearate
    1. Excellent primer grinding effect
    2, contains no organic solvent and is considered non-toxic.
    3 Excellent dispersion with a large range of compatibility. This makes production very simple.
    4. Water-based zincstearate seal packaging is stable for at least one year when stored in dry conditions. The effective storage period does not necessarily mean it can't be used. It must, however, be assessed to determine if it is still useful in the relevant applications.
    5. Use this product only in neutral conditions.
    Prices for zinc stearate cream emulsion
    Price is affected by many things, such as the demand and supply in the market, trends within the industry, economic activity, sentiment and unanticipated events.
    For the latest price of zinc stearate, send an enquiry to us for a quotation.
    Emulsion of zinc stearate
    Buffalotours (aka. Buffalotours (aka. Our company currently has a number of products. Our zinc stearate-emulsion is high in purity and impureness. To get the current price on zinc stearate oil emulsion please email us or click on any product to make an enquiry.

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    2023-02-01

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