If you are looking for high-quality products, please feel free to contact us and send an inquiry, email: brad@ihpa.net
What is bismuth oxid?
Bismuth oxide
The molecular formula of the inorganic compound is Bi2O3. The pure product comes in three types: a, b, and d. A type of yellow monoclinic cristal, relative densities 8.9 and 825, is soluble acid, insoluble water, alkali. B type is bright yellow-orange, tetragonal system crystals, relative densities 8.55 and 860, are soluble in Acid, but insoluble water. It can be easily converted to metallic Bismuth using hydrogen, hydrocarbons etc. It is a special material that has a cubic 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 and high-temperature superconducting material. 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 Hydrate Bi(OH3) precipitates. The 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 80-90deg C. The solution stays alkaline throughout precipitation. The white volume-expanded Bismuth Oxide Hydrate Bi(OH3) does precipitate, but it dehydrates and turns into 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 crucible is filled with metal bismuth and then melted. An arc is created between the graphite electrode surface and the metal surface 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 is 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
The final product is a lemon yellow color after cooling.
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.
(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacture with more than 12 year’s experience in providing super-high-quality chemicals and nanomaterials. Our company’s Bismuth Oxide Powder is high in purity, has fine particles, and contains low impurities. Please. Contact us if necessary.
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 Hydrate Bi(OH3) precipitates. The 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 80-90deg C. The solution stays alkaline throughout precipitation. The white volume-expanded Bismuth Oxide Hydrate Bi(OH3) does precipitate, but it dehydrates and turns into 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 crucible is filled with metal bismuth and then melted. An arc is created between the graphite electrode surface and the metal surface 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 is 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
The final product is a lemon yellow color after cooling.
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.
(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacture with more than 12 year’s experience in providing super-high-quality chemicals and nanomaterials. Our company’s Bismuth Oxide Powder is high in purity, has fine particles, and contains low impurities. Please. Contact us if necessary.