High Purity Bismuth Oxide Bi2O3 powder  CAS 1304-76-3,99.9%

Bismuth oxide powder, Bi2O3:
Bismuth Trioxide and Bismuth Oxide are inorganic compounds with the molecular structure Bi2O3. There are three types of pure products: type a (monoclinic crystal), type b (molecular formula Bi2O3) and type d (pure product). A type is a yellow monoclinic, yellow-colored crystal, with an 8.9 relative density and an 825 melting point. This product is stable in acids but not in water or alkali. B-type, which is brightly yellow to orange, has an 8.55 relative density and melts at 860. Soluble in acid. Insoluble in water. You can easily reduce it to bismuth by using hydrogen or hydrocarbons. d-Bi2O3 (cubic fluorite) is a unique material that has high oxygen conductivity. The main uses of bismuth dioxide include electronic ceramic powder, photoelectric, ultraconducting, catalysts and electrolyte/hydrocarbon materials. Bioxide is an essential additive to electronic ceramic powder materials. Purity is usually required to exceed 99.15%. Main application objects include zinc oxide varistor (ceramic capacitor), ferrite magnetic material in three types.
The atmospheric or water-soluble carbon dioxide forms bismuth subcarbonate when it reacts with Bi2O3. Bismuthoxide is an alkaline ox, which accounts for its high reaction with carbon dioxide. However, if an acidic compound such as Si(IV), is introduced to the bismuthoxide structure, it does not react with carbon dioxide.

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Bismuth oxide powder performance:

The pure trioxideproducts have two types. A yellow monoclinic crystal of the a type has a relative densit of 8.9 with an 825°C melting point. It is insoluble in acid and insoluble in water. The b-type, which is a bright yellow or orange cubic crystal system with relative density 8.55 and melting point 860, is insoluble, insoluble, and soluble, in both acidic and alkali. This can be easily reduced by hydrocarbons and hydrogen to make metallic bismuth.

Technical Parameters of Bismuth Oxide Bi2O3 powder :

How Bismuth Oxide bi2O3 Powder is produced?
1. Mix the sodium hydroxide solution with carbon dioxide in the bismuth-nitrate solution 80 90 to mix it. While the solution precipitates, it remains alkaline and white bulky-expanding bismuth nitrate solution Bi(OH)3 is formed. It is then heated to dehydrate yellow bismuth triooxide after stirring for a few seconds. The solution was then filtered, dried, and water decanted.
2. Mix 1.5mol/L sodiumhydroxide water solution, without carbon dioxide with 0.1mol/L bismuth nutrient solution in 1mol/L NaOH (at 80 90), in nitrogen atmosphere. Throughout the precipitation process, the solution is alkaline. After stirring for some time in a warm solution, the bulky-expanding white bismuth oxidehydrate Bi(OH),3 precipitates. However, once it has cooled down, it turns to light yellow bismuth Trioxide. Decanting, washing 15 times with water without oxygen and carbon dioxide to obtain bismuthoxide was enough. After that, it was filtered through a filter and dried.
3. Once the bismuth metal has been loaded in the graphitecrucible, it forms an arc between the graphite electro and the surface of the metal under the flow oxygen. The metal then heats up and is oxidized. You should place the crucible in large containers and ensure that oxygen is continuously available. It reacts at temperatures between 750 and 800 degrees Fahrenheit. The purity of the b-bismuth triooxide is greater than 99.8%. Once the product has been cooled in water, or placed on a plate of cold metal, it is ready to be used as a high-temperature b-type product.
4. Slowly mix Bi(NO3)3*5H2O acidic solutions (20g) into excess sodium carbonate solution. After stirring, place the aluminum boat in the oven at 650K for 1.5 hours.
5. Burn the basic bismuth-nitrate at 400500 and then remove the NO3 ions around (34h)
2BiONO3=Bi2O3+NO+NO2+O2
Once it has cooled, the product will be lemon-yellow.
6. Use a very small amount of dilute sodium nitric to clean the surface of the 16kg99.9% bismuth. Then, use conductive water for the removal of nitric. Next, add 1:1 high-purity Nitric Acid (35kg nitric agent with 1.42 RDH) and 20L conductivity distilled water. The reaction should continue for 10 min after adding. After heating to 65 70 degrees, the filtrate was evaporated, concentrated to a density of 1.9 and dried. Conductance water was used to disperse the bismuth nutrat, then let it stand for alkali bismuth precipitation.

Applications of Bismuth Oxide bi2O3 Powder .
Bismuth oxide can be used for making bismuth sodium.
Bismuth dioxide is an electronic ceramic powder, photoelectric material (high-temperature superconducting materials), catalyst, and electrolyte.
A key additive to electronic ceramic materials, bismuth dioxide is important. The purity of the powder must not be less than 99.15%.

Bismuth Oxide powder storage conditions:
Bismuth Oxide Bi2O3 powder must be stored in sealed containers.

Packing & Shipping Bismuth O2 TeO2 powder
You can pack it in two plastic bags with the inside.
Bismuth Oxide Bi2O3 powder packing - vacuum packaging, 100g to 500g or 1kg/bag at 25kg/barrel. Or as you request.
Bismuth Oxide Powder Shipping: could ship out by sea, air or express once the payment has been received.


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