Preparation method of nano bismuth oxide

Preparation method of nano bismuth oxide

 At present, researchers have developed a variety of methods for preparing nano-bismuth oxide, which can be summarized as solid phase, gas phase and liquid phase. In recent years, through the continuous improvement of related technologies, researchers have prepared more and more nano-bismuth oxides with different forms. Compared with the previous performance, the performance of these nano-bismuth oxides has not been greatly improved, and its application range is also expanding. The following briefly analyzes three methods of preparing nano-bismuth oxide: solid phase method, gas phase method and liquid phase method.

 (1) Solid phase method

The solid phase method is a relatively traditional powder preparation method. It usually makes the reaction reagents react in the solid phase to easily reach the reaction conditions, and the reaction process is not complicated, but the disadvantage is that the obtained product is relatively easy to form agglomerates and particles The size is not uniform enough. In some industrial production areas, due to low product quality requirements, this preparation method is still the main choice.

When preparing nano-cerium oxide, it is usually selected to mix, grind, and calcinate several materials participating in the reaction at a certain temperature, and finally the required nano-cerium oxide material can be obtained. For example, Hong Weiliang et al. Mix (BiNO3) 3 • 5H 2 O and NaOH thoroughly and uniformly, add a certain dispersant, grind, and then heat in a water bath while keeping the temperature at 60°C. After a series of treatments, the solution is finally obtained. The required nano cerium oxide has a polygonal shape and a particle diameter of about 60 nm.

(2) Gas phase method

The gas phase method refers to a method of preparing desired nanomaterials by subjecting substances to physical and chemical reactions in a gaseous state. Since the gas phase method is carried out at high temperature and lack of liquid during the reaction process, this method is suitable for preparing nanopowders. The product prepared by the gas phase method has small particle size, low agglomeration degree, high purity, and easy control of product components, but the reaction conditions are difficult to control and the reaction equipment requirements are strict, so this method is not easy to implement. .

The spray combustion method is an important gas phase method. The principle is to heat the metal to melt it until an aerosol is generated, and then a strong oxidation reaction occurs by burning a small metal object in the reaction furnace, thereby forming a nano metal oxide powder from a high-pressure gas flow. For example, Kim et al. The B-Bi2O3 nanowires with a diameter of about 30-90 nm were successfully synthesized at a certain temperature, and the temperature was continuously increased. They obtained the BiO3 film-like structure.

(3) Liquid phase method

The liquid phase method is the most mature technology and the most widely used nanomaterial preparation method. The liquid phase method can selectively prepare nanomaterials with different microscopic morphologies and material compositions, and the uniformity of the prepared nanomaterials is generally good. However, the disadvantage of this method is that it is easy to introduce impurities into the preparation process, so this method is generally not suitable for applications with high product purity. With the introduction of new technologies such as microwave radiation and ultrasonic methods, the technology of preparing nanomaterials by liquid phase method has also made great progress. Generally, there are many types of liquid-phase methods, mainly including freeze-drying, hydrothermal synthesis,

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,and is an advanced Functional materials;

The pure product of bismuth trioxide has α type and β type.The α type is yellow monoclinic crystal with a relative density of 8.9 and a melting point of 825°C.Soluble in acid, insoluble in water and alkali.β type is bright yellow to 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%.The main applications are zinc oxide varistors,ceramic capacitors,ferrite magnetic materials;and glaze rubber 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(firepro of paper),nuclear reactor fuel,firework materials,radiation protection materials,ceramic packaging materials,etc.

The price of bismuth oxide Bi2O3 powder

The price of Bi2O3 bismuth oxide powder will vary randomly with the production cost, transportation cost, international situation, and the market supply and demand of Bi2O3 bismuth oxide powder. Tanki New Materials Co., Ltd aims to help all 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.

Suppliers of bismuth oxide Bi2O3 powder

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 and engineered materials.The company has successfully developed a series of powder materials(including carbonization Boron,aluminum carbide,titanium carbide,etc.),high-purity targets,functional ceramics and structural devices,and provide OEM services.