What is Bismuth oxide and its application

What is bismuth oxid? Bismuth oxid The molecular formula of the inorganic compound is Bi2O3. The pure product comes in three types: a, b, and d. The a type has a yellow monoclinic structure, melting temperature 825, relative densities 8.9 and 8.55; it is insoluble with water, acid or alkali. The b type, however, is bright yellow-orange, tetragonal system, relative densities 8.55 and 860, is insoluble with water, acid or alkali. It can be easily converted to metallic Bismuth using hydrogen, hydrocarbons etc. It is a special material that has a cubic fluorite structure. The crystal lattice of d-Bi2O3 is void in 1/4, which gives it a high oxygen conductivity. Bismuth Oxide is mainly used for electronic ceramic powder materials. It can also be used as photoelectric materials. Bismuth is an essential additive in electronic ceramic materials. Its purity must be at least 99.15%. Main application objects include ceramic capacitors, zinc oxide varistors, and ferrite magnet materials.

Bismuth Oxide preparation
1. Dropwise, add to the bismuth-nitrate solution at 80-90degC a sodium hydroxide-free aqueous solution. Mix. The solution stays alkaline and the white, volume-swelling, bismuth oxide hydroxide Bi(OH3) precipitates. This solution is heated, stirred and dehydrated to yellow. Bismuth Trioxide . After filtering, drying and washing the bismuth oxide is obtained.
2. Mix them under a nitrogen-filled atmosphere by adding dropwise a 1,5 mol/L sodium aqueous hydroxide solution (without carbon dioxide) to a bismuth solution (0.10 mol/L, dissolved in 0.1 mol/L of nitric solution (1 mol/L), at 80-90 degrees C. The solution is alkaline even after precipitation. The white volume-expanded Bismuth Oxide Hydrate Bi(OH)3 does precipitate, but it dehydrates and turns into a light yellow Bismuth Trioxide when stirred for some time in the hot water solution. Decant the solution and wash it 15 times without adding air or carbon dioxide. Then filter and dry.
3. The graphite electrode is placed between the metal surface and the graphite electrode. An arc is created under oxygen flow. For a continuous supply of oxygen to the crucible, it should be placed inside a large vessel. The reaction is carried out at 750-800degC and the b bismuth trioxide is generated quickly. It has a purity level of 99.8%. A high-temperature phase B-type product can then be obtained by quenching the product in water or a metal plate.
4. Stir vigorously as you add the acidic Bi(NO3)3*5H2O (20g dissolved 2mol/L in HNO3) solution to the excess sodium-carbonate solution. Filter, wash, and then dry the Bi2O3CO3 crystalline precipitate. Place it in a aluminum boat, and heat it at 650K in the air for approximately 1.5 hours.
5. Burn the Bismuth Subnitrate between 400500 for 34 hours to remove NO3 ions:
2BiONO3=Bi2O3+NO+NO2+O2
After cooling down, the final product will be a lemon yellow color.

Bismuth Oxide is used in the application of Bismuth oxide
Bismuth oxide is used to prepare bismuth sal; it can also be used in electronic ceramic powder materials, photoelectric materials, superconductors at high temperatures, and as a catalyst. Bismuth Oxide is an essential additive in electronic ceramic materials and must have a purity of at least 99.15%. Main application objects include zinc oxide varistors; ceramic capacitors and ferrite magnet materials. Other applications include glaze rubber compounding, medicine, Red Glass compounding, etc.

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The Applications of Bismuth Oxide

How do you define it? Bismuth Oxide Powder ?
The most popular bismuth compound is the Bi2O3 Bismuth Oxide Powder. It is a functional material with advanced functional properties that has exceptional dielectric and oxygen fluidity.
There are two types of pure bismuthtrioxide: a and b. Yellow monoclinic crystal of the a type has an 8.9 relative density and a melting points of 825degC. Solventible in acids, but insoluble when alkali is added. Bright yellow to orange cubic crystal, relative density 8.55, melting temperature 860degC. Soluble in acids but insoluble when water. Available in reduced form by hydrocarbons, hydrogen and other organic compounds.
Here are some of the key features Bismuth Oxide powder
Bismuth dioxide is an important additive for electronic ceramic material. Its purity must be at least 99.15%. Main application objects include zinc oxide varistor, ceramic capacitor and ferrite magnetic materials.
Water-soluble or atmospheric carbon dioxide can react easily with bi2O3 to make bismuthsubcarbonate. Bismuth dioxide is an alkaline oxide which accounts for its high reactivity to carbon dioxide. The reaction with carbon dioxide does not take place if an acidic compound such as Si(IV), enters the bismuth oxide structure. The concentration of sodium hydroxide, bromine or a mixture thereof will form bismuth (III), or potassium bismuth.
Bismuth Oxide Properties
Other Titles Bismuth trioxide (Bi2O3) powder
1304-76-3
Compound Formula Bi2O3
Molecular Weight 465.96
Appearance Powder in light yellow
Melting Point 817 degC
Boiling Point 1890 degC
Density 8.9 g/cm3
Solubility of H2O N/A
Exact Mass 465.945541
Bismuth Oxide Bi2O3 powder CAS 1304-76-3
Bismuth Oxide powder uses
Useful for making bismuth sodium salt. Also used in electronic ceramic materials, as photoelectric material, electrodelyte material or high temperature superconducting materials, and catalyst. A purity level of 99.15% is required for bismuth dioxide, which is an important ingredient in electronic ceramics powder materials. Zinc oxide varistors, ceramic capacitors and ferrite magnet materials are the main uses. Glaze rubber compounding agent is also used, as medicine compounding agent, red glass compounding agents, etc.
It is used extensively in electronics, chemicals, glass, plastic, ceramic glaze, and other industries such as catalysts, electronic ceramic powder, magnet materials magnetic materials high-temperature superconducting material, metal materials, photoelectric materials.
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