1. Insulating ceramics mainly include: insulators, insulating porcelain bottles, insulating shells, insulating rods, and other products and accessories used for high and low voltage, AC and DC operations.
Second, alumina ceramics: can be divided into 95 zirconium porcelain and 99 zirconium porcelain; This can be made into alumina ceramic tools, as well as all the components in the engine, aerospace applications and so on, all made of alumina ceramics.
3. Wear-resistant ceramics: mainly used in mining enterprises, fan industry, power plants and thermal power plants. Using wear-resistant patches, wear-resistant bricks and wear-resistant rods, our company can organize construction, technical guidance and development.
4. Alumina ceramics have the advantages of high hardness, good wear resistance, high toughness, low friction coefficient and good corrosion resistance, so alumina ceramics are widely used in mechanical seals, cutting tools, ball milling media, ceramic bearings, automobile engine parts and so on. The wear resistance of alumina ceramics is ten times that of alumina ceramics, but the friction coefficient of alumina ceramics itself is very low.
Then the Jie Jun ceramics mentioned above also explain the difference between ceramics for us. Then Bian Xiao concluded that compared with ordinary ceramics, it is brittle, but the wear resistance is not high, and the service life of ordinary ceramics is short. Alumina ceramics produced by Jie Jun Ceramics have just solved these shortcomings, with good toughness, high wear resistance and long service life, which is a good choice for us.
The alumina content is different.
Alumina ceramics are divided into 75 (75%), 92 (92%), 95 (95%), 96 (96%), 97 (97%), 99 (99%), 995 (99.5%) and 997 (99.7%). Most domestic manufacturers produce 95% alumina ceramic products, and the products tend to develop to high content.
Alumina ceramics is a kind of ceramic material with alumina (Al2O3) as the main body, which is used in thick film integrated circuits. Alumina ceramics have good electrical conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramics is a kind of widely used ceramics. Because of its superior performance, it has been widely used in modern society to meet the needs of daily use and special performance.
Alumina ceramics can be divided into two types: high purity type and ordinary type.
High-purity alumina ceramics contain more than 99.9% Al2O3. Because its sintering temperature is as high as 1~6μm- 1990℃ and its transmission wavelength is 1~6 μ m, it is usually made into glass liquid instead of platinum crucible. Using its light transmittance and alkali metal corrosion resistance, it is used as sodium lamp tube; It can be used as integrated circuit substrate and high frequency insulating material in electronic industry.
Ordinary alumina ceramics are divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain and other varieties according to the different Al2O3 content, and sometimes those with 80% or 75% Al2O3 content are also classified as ordinary alumina ceramics. Among them, 99 alumina porcelain materials are used to make high-temperature crucibles, refractory furnace tubes and special wear-resistant materials, such as ceramic bearings, ceramic seals, water valves and so on. 95 alumina porcelain is mainly used as corrosion-resistant and wear-resistant parts; Because part of talc is often mixed into 85 porcelain, the electrical properties and mechanical strength are improved, and it can be sealed with metals such as molybdenum, niobium and tantalum, and some of it can be used as electric vacuum devices.
Aluminum chloride is an inorganic compound with the chemical formula AlCl3, which is a compound of chlorine and aluminum. Aluminum chloride has a low melting point and a low boiling point and will sublimate, so it is a valence compound. Molten aluminum chloride is not conductive, which is different from most salts containing halogen ions (such as sodium chloride).
AlCl3 is a "YCl3" structure, which is the most densely packed layered structure of Al3+ cubes, while Al3+ in AlBr3 accounts for Br? Adjacent tetrahedral gaps of the most densely packed frame. When molten, Al _ 2Cl _ 6 forms a volatile dimer containing two three-center four-electron chlorine bridges. At higher temperature, Al2Cl6 dimer dissociates to form planar triangle AlCl3, which is similar to boron trifluoride (BF3).
Aluminum chloride is a white crystalline powder. Aluminum chloride vapor exists in the form of dimer molecule (Al2Cl6) when it is dissolved or melted in nonpolar solvent, and its atomic valence is * * *. Soluble in water and many organic solvents. The aqueous solution is acidic. In the presence of aromatic hydrocarbon, the mixture of aluminum chloride and aluminum can be used to synthesize bis (aromatic hydrocarbon) metal complexes. For example, diphenyl chromium is prepared by Fischer-Hafner synthesis of specific metal halides.
Chinese name
Aluminium chloride [2]
Foreign name
Aluminium chloride [2]
Another name
Aluminium trichloride [2]
chemical formula
Aluminium trichloride [2]
molecular weight
133.34[2
Boron trichloride is an inorganic compound with the chemical formula of BCl3, which is mainly used as a catalyst for organic reactions such as esterification, alkylation, polymerization, isomerization, sulfonation and nitration. It can also be used as an antioxidant for casting magnesium and alloys, and as a main raw material for preparing boron halide, elemental boron, borane, sodium borohydride, etc. , also used in electronic industry, etc.
Chinese name
boron trichloride
Foreign name
boron trichloride
chemical formula
BCl3
molecular weight
1 17. 17
Chemical abstracts service registration number
10294-34-5
Basic information, physical and chemical properties, calculation of molecular structure data, use of chemical data, emergency treatment and safety information, said ta.
Basic information
Chemical formula: BCl3
Molecular weight: 1 17. 17.
Si Nuo. : 10294-34-5
EINECSno。 : 233-658-4
physicochemical property
Melting point:-107℃
Boiling point: 12.5℃
Critical temperature: 178℃
Critical pressure: 3.9 MPa
Saturated vapor pressure: 150kPa(20℃)
Appearance: colorless gas [1]
Molecular structure data
Molar refractive index: 20.02
Molar volume (cc/mol): 84.6
Isotonic specific volume (90.2 k): 184.4
Surface tension (dyne/cm): 22.5
Polarity (10-24cm3): 7.93 [1]
Computational chemical data
Reference value of hydrophobic parameter calculation (XlogP): None.
Number of hydrogen bond donors: 0
Number of hydrogen bond acceptors: 0
Number of rotatable chemical bonds: 0
Number of tautomers: 0
Polar surface area of topological molecules: 0
Number of heavy atoms: 4
Surface charge: 0
Complexity: 8
Atomic number of isotope: 0
Determine the number of atomic solid centers: 0
The number of uncertain atomic solid centers: 0
Determine the number of solid centers of chemical bonds: 0
The number of uncertain chemical bond solid centers: 0
* * * Number of valence bond units: 1[ 1]
use
It is mainly used as a catalyst for organic reactions such as esterification, alkylation, polymerization, isomerization, sulfonation and nitration. It can also be used as an antioxidant when casting magnesium and alloys, and can also be used as the main raw materials for preparing boron halide, elemental boron, borane and sodium borohydride. , also used in electronic industry, etc.
Emergency treatment
Emergency treatment of leakage
Evacuate the personnel in the leaked contaminated area to the upwind area quickly, and immediately isolate 150m, and strictly restrict access. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and protective clothing. Cut off the leakage source as much as possible. If it is gas, ventilate it reasonably to accelerate its diffusion. Spray water is diluted and dissolved. Build a dike or dig a pit to contain a large amount of wastewater. If possible, send residual gas or leaked gas to the water washing tower or fume hood with exhaust fan. Leaked containers should be properly treated, repaired and inspected before use. If it is liquid, use sand, vermiculite or other inert materials to absorb it. If there is a lot of leakage, build a dike or dig a pit to contain it; Spray-like water cools the dilution steam to protect the field personnel, but don't spray water directly at the leakage point. Use explosion-proof pump to transfer it to tank car or special collector, and recycle it or transport it to waste disposal site for treatment.
protective measure
Respiratory system protection: when the concentration in the air exceeds the standard, wear a self-priming filter gas mask (full face mask). It is recommended to wear an oxygen respirator during emergency rescue or evacuation.
Eye protection: respiratory protection has been done.
Physical protection: Wear rubber acid and alkali resistant clothes.
Hand protection: wear rubber gloves.
Others: Take a shower and change clothes after work. Maintain good hygiene habits.
Which is more acidic, aluminum chloride or boron trichloride?
Aluminum chloride is highly acidic.
Aluminum chloride releases heat violently when it meets water, producing chlorine gas.
Strong metal and weak acid, it should be aluminum chloride.