Preparation of bismuth oxide

Preparation of bismuth oxide

A method for producing high-purity bismuth oxide from bismuth-containing materials. Firstly, the bismuth-containing material and the hydrochloric acid solution are leached, so that the bismuth in the bismuth-containing material enters the solution in the form of bismuth chloride, so that the leaching solution is separated from the leaching residue; then pure water is added to the leaching solution, and the bismuth chloride is hydrolyzed and precipitated Bismuth oxychloride; then the precipitated bismuth oxychloride is separated, added with a dilute alkali solution, and the bismuth oxychloride is converted into dilute alkali under the condition of dilute alkali bismuth oxide at low temperature. The filtered bismuth is added with concentrated alkali solution and converted into bismuth oxide after high temperature concentrated alkali; finally, the generated bismuth oxide is washed, dried, and sieved to obtain high-purity bismuth oxide. In the present invention, bismuth-containing materials are used as raw materials to make bismuth enter the solution in the form of bismuth chloride, and then turn into bismuth oxychloride, and then undergo low-temperature dilute alkali conversion and high-temperature concentrated alkali conversion to produce bismuth oxide. The method has simple process and small amount of reagents, and can carry out deep purification and separation of impurities such as Fe, Pb, Sb, As, etc. Then through low-temperature dilute alkali conversion and high-temperature concentrated alkali conversion to produce bismuth oxide. The method has a simple process and a small amount of reagents, and can carry out deep purification and separation of impurities such as Fe, Pb, Sb, As and the like. Then through low-temperature dilute alkali conversion and high-temperature concentrated alkali conversion to produce bismuth oxide. The method has a simple process and a small amount of reagents, and can carry out deep purification and separation of impurities such as Fe, Pb, Sb, As and the like.

Due to burning at different temperatures, bismuth oxide can produce three variants: α body: yellow heavy powder or monoclinic crystal, melting point 820℃, relative density 8.9, refractive index 1.91. It becomes γ-body at 860℃. β body: gray-black cubic crystal, relative density 8.20, transformed into α body at 704°C. γ-body: light lemon yellow powder, belonging to tetragonal crystal system, melting point 860℃, relative density 8.55, yellowish brown when melting, yellowish after cooling, melting under strong red heat, and crystallizing after cooling the block. All three are insoluble in water, but soluble in ethanol and strong acid. Preparation method: burn bismuth carbonate or bismuth subnitrate to constant weight. Keep at 704°C to obtain α and β bodies, and keep at 820°C to obtain γ bodies.

Overview of bismuth oxide Bi2O3 powder

Bi2O3 bismuth oxide powder is one of the most important bismuth compounds. It has excellent dielectric properties, high oxygen fluidity, large energy gap, high refractive index, significant photoconductivity and photoluminescence. It is an advanced functional material ；

Pure bismuth trioxide has α type and β type. The α type is yellow monoclinic crystal, the relative density is 8.9, and the melting point is 825°C. Soluble in acid, insoluble in water and alkali. β type is bright yellow and orange, cubic crystal system, relative density 8.55, melting point 860°C, soluble in acid but insoluble in water. Easily reduced to metallic bismuth by hydrogen, hydrocarbons, etc.

Application of bismuth oxide Bi2O3 powder

Used to prepare bismuth salt; used as electronic ceramic powder material, electrolyte material, photoelectric material, high temperature superconducting material, catalyst. As an important additive in electronic ceramic powder materials, bismuth oxide usually requires a purity greater than 99.15%. Mainly used zinc oxide varistors, ceramic capacitors, ferrite magnetic materials; glaze glue compounding agent, medicine, red glass compounding agent, etc.

Bismuth oxide Bi2O3 powder is widely used in the electronics industry, chemical industry, glass industry, plastic industry, ceramic glaze and other material industries, such as electronic ceramic powder materials, electrolyte materials, magnetic materials, photoelectric materials, high-temperature superconducting materials, catalysts, Fireproof materials (fireproof paper), nuclear reactor fuel, firework materials, radiation protection materials, ceramic packaging materials, etc.

Bismuth oxide Bi2O3 powder price

The price of Bi2O3 bismuth oxide powder will change randomly according to factors such as production cost, transportation cost, international situation, and market supply and demand of Bi2O3 bismuth oxide powder. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for Bi2O3 bismuth oxide powder, please feel free to send an inquiry to get the latest price of Bi2O3 bismuth oxide powder.

Bismuth oxide Bi2O3 powder suppliers

As a global supplier of bismuth oxide Bi2O3 powder, Tanki New Materials Co.,Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.