2023-04-06

Mechanical performance of expansion graphite at different temperatures

Expansion graphite has excellent chemical stability, heat resistance, sealing, self -lubricating, radiation resistance and high heat -conducting. It is widely used in industrial fields such as machinery, oil, chemical, metallurgy, aerospace, navigation, transportation, and transportation. It is an ideal advanced sealing material. The mechanical property of expanded graphite may be different at different temperatures.1. Within the temperature range of 400 degrees Celsius, the compressed elastic modulus, rebound rate, and compression rate of expansion graphite sealing materials are not significantly affected by the temperature, and the impact is not greatly affected.2. There are significant differences in the compression modulus, rebound rate, and compression rate of two samples made of different materials formulas and processes, and there are also appropriate differences in the compression strength.3. Within the temperature range from room temperature to 400 degrees, the pressure resis

2023-03-21

What is the purpose of expanding graphite

Adsorption agent of industrial oil.

Graphite structure

Graphite is a transitional crystal between atomic crystals, metal crystals and molecular crystals

2023-08-02

The difference between flake graphite and expanded graphite

Flake graphite is a type of natural graphite that, after being extracted and purified, generally appears in the form of fish scales, hence it is called flake graphite. Expandable graphite refers to flake graphite that, after acid washing and intercalation treatment, expands by about 300 times compared to the previous graphite. It can be used as raw materials for coils and flexible graphite. Below, let me introduce in detail the differences between flake graphite and expandable graphite:1. The use of flake graphite is more extensive than that of expandable graphiteIn industrial production, flake graphite not only has the function of expandable graphite, but also has much better conductivity, thermal conductivity, smoothness, and so on than expandable graphite. So its practical use in industry is becoming increasingly widespread.2. The production processes of flake graphite and expandable graphite are differentFlake graphite is mainly made by mechanical damage and grinding. Expandable g

2023-10-27

Maintenance and upkeep of graphite crucibles

The graphite crucible must be strictly protected from moisture and must be stored in a dry place or on a wooden frame. When handling graphite crucibles, it is important to handle them with care and prevent them from falling or shaking. Before using them, they should be baked in a drying equipment or by the furnace to raise the temperature to 500 ℃. The graphite crucible should be placed below the surface of the furnace mouth to prevent wear and tear on the furnace cover. When adding materials, it should be based on the solubility of the crucible, and too much material should not be added to prevent tightening the crucible. The furnace outlet and crucible clamp should conform to the shape of the crucible, and the clamp in the middle should prevent damage to the crucible due to stress on the department. When removing slag and coke from the inner and outer walls of the crucible, it should be gently knocked to prevent damage to the crucible. A suitable distance should be maintained betwee

2023-07-17

What are the characteristics of high pure scales graphite

High -pure scales graphite has good high temperature resistance, conductivity, high -pure graphite thermal conductivity, lubrication and chemical stability. Graphite manufacturers are widely used in metallurgical, machinery, environmental protection, chemical, fire, electronics, medicine, military, military, aerospace and other fields. Its status in the national economy is becoming more and more important, and it is an indispensable and important non -metal raw material for modern industry and high -tech development. Trace impurities have a great impact on the performance of graphite products. The higher the carbon content of high pure scales, the better its performance as a functional material.In order to analyze the trace impurities in high pure scales, the sample is usually grayed or wet to digest to remove carbon, dissolved ash with acid, and then determined the impurities in the solution. The grayization method does not need to dissolve gray with ultra -pure acid, avoiding the ri

2023-07-25

The method of antioxidant and antioxidant in scales graphite

First, research on scales graphite antioxidant.The cold pressure of natural scales graphite non -adhesives into natural scale graphite samples, the effects of molding pressure and thermal insulation time on sample density, pore rate and folding strength. The relationship between the micro -structure and anti -folding strength of the natural scales graphite sample is qualitatively analyzed. The two systems of boric acid-urea and ethyl athyl-hydrochloric acid were selected to study and explore the antioxidant performance and mechanism of natural graphite powder and natural graphite electrode samples before and after antioxidant treatment.Second, the application of scales graphite antioxidants.The main component of graphite antioxidants -high temperature -resistant nano -ceramic particles, loosening in the water solvents, forming a light red and nearly transparent liquid source. In -pores that penetrate into graphite materials, form a layer of antioxidant protective film on the surface o

2023-02-22

What are the characteristics of graphite board?

The use of graphite board is so common, so what characteristics does it have?1. Easy process performance of graphite board: graphite board can be cut into different sizes, appearances, and thin thickness. It can give the membrane cutting plane board, which can be thinned from 0.05 to 1.5m.2. The heat resistance of graphite board: The temperature of the graphite board can reach 400 ° C, which can be less than -40 ° C.3. High -transmission thermality of graphite board: The thermal conduction rate in the plane map of the graphite board can achieve 1500W/mk, the heat transfer coefficient is 40%lower than the aluminum, 20%lower than the copper.4. The coordination ability of graphite board: The graphite board is very easy to make a multi -layer board with metal materials, cable shestages or double -sided tape to enhance the coordination ability of the design scheme and can have adhesives behind it.5. The lightness of graphite board: graphite board is 30%lighter than the same specifications,

2023-06-07

The characteristics of silicon graphite

High hardnessThe hardness of silicon graphite is actually the hardness of SIC. It is second only to diamond, boron nitride, boron boronized, and has high hardness than tungsten tungsten and tritenuxide.Excellent corrosion resistanceSIC is a compound of a combination of covalent bonds. The chemical performance is stable. Except for strong oxidized gases and melting alkali, it is almost not eroded by other acid and alkali.Good high temperature antioxidantSICs with dense SI island glass phase at high temperature to prevent oxygen and SIC from contacting and prevent silicon carbide from continuing to oxidize. Therefore, SIC can be used above 1000 ° C for a long time.Excellent heat shocksSilicon fossils are heated to 1200 ° C for 10s, and they are put into room temperature water. It repeatedly repeatedly, as well as before, neither rupture nor peeling.

2023-05-05

Graphite powder has the cause of self -lubrication performance analysis

Graphite powder is a wear -resistant material, and its self -lubrication performance is its most important feature. Graphn powder has a good self -lubrication performance due to its special layer -shaped crystal structure. The following are the analysis of the reasons for the self -lubricating property of graphite powder:The carbon atoms in graphite lattles are arranged in hexagonal on different planes. The distance between the carbon atoms in the same plane layer is 1.42 meters, and the distance between the carbon atom of each plane layer is 3.35. They are staggered along the same direction, repeat the position of the first plane in the third plane, the fourth plane repeats the position of the second plane, and so on. In each plane layer, because the carbon atoms are relatively tight, the binding forces between them are relatively large, and the carbon atom between layers and layers is far from each other, which is easy to separate and relatively slide. This is the main reason why gr