By lql | 12 February 2023 | 0 Comments
What are the properties of amorphous boron powder?
What is Amorphous boron powder?
Boron powder Mr10.81 ρ2.37g/cm3 (amorphous); 2.34 ~ 2.46 g/cm3 (crystal). The melting point is 2177 ~ 2301℃. The boiling point is 2550 ~ 2658℃. Boron has the largest volume of heat, and its weight heat is second only to beryllium. Slightly soluble in nitric acid and insoluble in water. Amorphous boron powder is a black or brown amorphous powder with a melting point of 2150℃ and a boiling point of 3680℃. Its chemical properties are relatively active, and it is stable in air and room temperature. When it is heated to 300℃, it will be oxidized, and when it reaches 700℃, it will catch fire. The boron flame with slight gasification is green.
Boron powder Mr10.81 ρ2.37g/cm3 (amorphous); 2.34 ~ 2.46 g/cm3 (crystal). The melting point is 2177 ~ 2301℃. The boiling point is 2550 ~ 2658℃. Boron has the largest volume of heat, and its weight heat is second only to beryllium. Slightly soluble in nitric acid and insoluble in water. Amorphous boron powder is a black or brown amorphous powder with a melting point of 2150℃ and a boiling point of 3680℃. Its chemical properties are relatively active, and it is stable in air and room temperature. When it is heated to 300℃, it will be oxidized, and when it reaches 700℃, it will catch fire. The boron flame with slight gasification is green.
At high temperatures, it can interact with oxygen, nitrogen, sulfur, halogen, and carbon to generate various compounds, can also directly combine with many metals to generate metal borides, and can also react with organic compounds to generate organic boron. It is used as surface coating materials in the semiconductor industry, powder metallurgy additives, and thermal spraying.
Physical and chemical characteristics of Amorphous boron powder
Molecular weight: 10.81. Amorphous boron powder is a black or brown amorphous powder with a melting point of 2150℃ and a boiling point of 3680℃. Its chemical properties are relatively active, and it is stable in air and room temperature. When it is heated to 300℃, it will be oxidized, and when it reaches 700℃, it will catch fire. The boron flame with slight gasification is green.
Amorphous boron is chemically active. Powder and air can form an explosive mixture. Preparation of indefinite boron by reduction of boron anhydride with magnesium. Used for solid ramjet and clean, smokeless propellant.
Various coating agents were used to coating the surface of boron powder particles. The effects of various coating agents on coated boron powder were studied by transmission electron microscope and acidity meter, and the composition of combustion residue containing coated boron propellant was analyzed by chemical analysis method.
The results show that a coating layer is formed on the surface of boron powder after coating with a coating agent. The pH value of the coated suspension system of boron powder and water is obviously increased, which is suitable for the pharmaceutical process of boron-containing fuel-rich propellant. The combustion efficiency of boron powder after the coating is obviously improved.
Measurement of combustion heat of boron powder
Boron has become the preferred high-energy component additive because of its high volume calorific value. In order to measure the combustion heat of boron powder more accurately, an oxygen bomb calorimeter was used, and SQ-2 was used as the combustion improver. The effects of the quality and shape of the combustion improver and the oxygen pressure in the oxygen bomb on the combustion heat test results of boron powder were studied experimentally.
Combined with the two-stage combustion model of boron, it is pointed out that gas temperature is the key parameter affecting the combustion efficiency of boron powder. The theoretical calculation model of gas limit temperature in oxygen bomb is established, and the relationship between calculation temperature and combustion efficiency of boron powder is given. The results show that increasing the limit temperature is an effective means to improve the measurement of the combustion heat of boron powder.
Combustion heat test of boron powder
In order to improve the accuracy of measuring the combustion calorific value of boron powder by combustion-supporting method and to explore the rules and principles of selecting combustion-supporting agents, four substances commonly used in the field of boron-containing propellant development, namely benzoic acid, 90 square tablets, magnesium powder, and a rocket propellant test standard medicine, were selected as combustion-supporting agents, and the combustion heat of 95-grade amorphous boron powder was measured in GR3500 oxygen bomb calorimeter by dry and wet mixing methods, and comparative experimental studies were carried out.
The results show that the combustion heat of boron powder is directly measured without adding a combustion improver, and the ignition fails; The combustion efficiency of boron powder is different with different combustion improvers. It is considered that the selected combustion improver should have the characteristics of easy ignition, high calorific value, high combustion temperature, and low gasification rate, the burning rate should match with boron powder, and the chemical properties should have good compatibility with boron powder. In addition, in the mixed sample, the closer the combustion improver is combined with boron powder, the more evenly it is mixed, and the more it can play the role of combustion-supporting. Compared with dry mixing, the combustion efficiency of boron powder is higher when the solid drug strip sample is made by wet mixing to test the combustion calorific value of boron powder.
Price of Amorphous boron powder
Amorphous boron powder particle size and purity will affect the product's price, and the purchase volume can also affect the cost of Amorphous boron powder. A large amount of large amount will be lower. The price of Amorphous boron powder can be found on our company's official website.
Amorphous boron powder supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Amorphous boron powder, nitride powder, Amorphous boron powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Amorphous boron powder, you are welcome to contact us or inquire any time.
Physical and chemical characteristics of Amorphous boron powder
Molecular weight: 10.81. Amorphous boron powder is a black or brown amorphous powder with a melting point of 2150℃ and a boiling point of 3680℃. Its chemical properties are relatively active, and it is stable in air and room temperature. When it is heated to 300℃, it will be oxidized, and when it reaches 700℃, it will catch fire. The boron flame with slight gasification is green.
Amorphous boron is chemically active. Powder and air can form an explosive mixture. Preparation of indefinite boron by reduction of boron anhydride with magnesium. Used for solid ramjet and clean, smokeless propellant.
Various coating agents were used to coating the surface of boron powder particles. The effects of various coating agents on coated boron powder were studied by transmission electron microscope and acidity meter, and the composition of combustion residue containing coated boron propellant was analyzed by chemical analysis method.
The results show that a coating layer is formed on the surface of boron powder after coating with a coating agent. The pH value of the coated suspension system of boron powder and water is obviously increased, which is suitable for the pharmaceutical process of boron-containing fuel-rich propellant. The combustion efficiency of boron powder after the coating is obviously improved.
Measurement of combustion heat of boron powder
Boron has become the preferred high-energy component additive because of its high volume calorific value. In order to measure the combustion heat of boron powder more accurately, an oxygen bomb calorimeter was used, and SQ-2 was used as the combustion improver. The effects of the quality and shape of the combustion improver and the oxygen pressure in the oxygen bomb on the combustion heat test results of boron powder were studied experimentally.
Combined with the two-stage combustion model of boron, it is pointed out that gas temperature is the key parameter affecting the combustion efficiency of boron powder. The theoretical calculation model of gas limit temperature in oxygen bomb is established, and the relationship between calculation temperature and combustion efficiency of boron powder is given. The results show that increasing the limit temperature is an effective means to improve the measurement of the combustion heat of boron powder.
Combustion heat test of boron powder
In order to improve the accuracy of measuring the combustion calorific value of boron powder by combustion-supporting method and to explore the rules and principles of selecting combustion-supporting agents, four substances commonly used in the field of boron-containing propellant development, namely benzoic acid, 90 square tablets, magnesium powder, and a rocket propellant test standard medicine, were selected as combustion-supporting agents, and the combustion heat of 95-grade amorphous boron powder was measured in GR3500 oxygen bomb calorimeter by dry and wet mixing methods, and comparative experimental studies were carried out.
The results show that the combustion heat of boron powder is directly measured without adding a combustion improver, and the ignition fails; The combustion efficiency of boron powder is different with different combustion improvers. It is considered that the selected combustion improver should have the characteristics of easy ignition, high calorific value, high combustion temperature, and low gasification rate, the burning rate should match with boron powder, and the chemical properties should have good compatibility with boron powder. In addition, in the mixed sample, the closer the combustion improver is combined with boron powder, the more evenly it is mixed, and the more it can play the role of combustion-supporting. Compared with dry mixing, the combustion efficiency of boron powder is higher when the solid drug strip sample is made by wet mixing to test the combustion calorific value of boron powder.
Price of Amorphous boron powder
Amorphous boron powder particle size and purity will affect the product's price, and the purchase volume can also affect the cost of Amorphous boron powder. A large amount of large amount will be lower. The price of Amorphous boron powder can be found on our company's official website.
Amorphous boron powder supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Amorphous boron powder, nitride powder, Amorphous boron powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Amorphous boron powder, you are welcome to contact us or inquire any time.
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