Q:25%, the fracture of graphite rod, pressing problem or sintering problem?

25% of the filling, 40 feel a little lower, and personally recommend using 50MPa. How long have you been under pressure? Suggest 20-30 minutes. Release the pressure a little slower, it will crack soon. Sintering, the insulation point does not need so much, 340, 320, recommended insulation for 4 hours. Also suggest that you do not put too many blanks in a furnace, it is better to cover in the middle, rough heating and heat dissipation will have an impact.

Q:What about the thermal conductivity of graphite rods?

Its thermal conductivity is not only more than steel, iron, lead and other metal materials, and with the rise in temperature, thermal conductivity decreases, which is different from the general metal materials, at very high temperatures, graphite and even tend to adiabatic state.

Q:What kind of sketch do you want, Shi Mobang?

No, it's about two or three yuan for a box and ten for two months. Graphite can be used instead.

Q:How many times will a high pure graphite stick turn red at temperature?

With the increase of temperature, the oxidation rate is increased, if the nitrogen protection, can reduce the oxidation rate, so some high temperature furnace, vacuum furnace and vacuum extraction is to prevent the oxygen in the air oxidation of graphite, McNair to answer your questions.

Q:What is the difference between a graphite wand, a drawing pencil and an ordinary Chinese painting pencil?

Graphite is an allotrope of elemental carbon is the most soft conductive minerals. Graphite and its products have the properties of high temperature resistance and high strength. Graphite can be used as a pencil core, pigment, polishing agent. After special processing, graphite can be made of various special materials for industrial departments.The main part of the pencil core is graphite. In fact, the pencil is made from a mixture of graphite and clay at a certain proportion. Such as "H" or "hard" English (hard) on behalf of the prefix, content of clay, pencil hardness to said. The bigger the number in front of the H (such as 6h), the harder the pencil core, the greater the proportion of clay in the cartridge to the graphite, the less pronounced the word, and is often used to duplicate.

Q:What are graphite products mainly including?Specific points can understand

One of the main uses of graphite is to produce refractories, including refractory bricks, crucibles, continuous casting powders, mold cores, molds, detergents and high temperature resistant materials. In recent years, two important changes in the refractory industry is MgO-C brick is widely used in steelmaking furnace lining, and the application of aluminum carbon brick in continuous casting process. The graphite refractories and steelmaking refractories are closely linked, the world steel industry about consumption.

Q:Why is there no graphite rod in battery five now?!

Because of the size of battery 5, but not with graphite rods, what specific use, and then wait for an expert

Q:What is the difference between the conductive effects of different grades of graphite? Refers to the pencil core

B is "black" (black) English prefixes, on behalf of graphite, is used to represent the case of soft pencil and write the obvious level. To "6B" for the most soft, the most black handwriting, often used in painting, ordinary pencil mark is generally "Hb."". The pencil mark used to cover the answer sheet during the exam is usually "2B""

Q:Copper, graphite rods, dilute sulfuric acid, why not make up the original battery?

Because there is no oxidant, and can not react with dilute sulfuric acid, and if the graphite rod in the vicinity of the continuous access to oxygen, you can form the original battery

Q:Is graphite rod resistant to sulfur corrosion?

It is widely used in petroleum, chemical, hydrometallurgy, acid and alkali production, synthetic fiber, paper making and other industrial sectors. It can save a great deal of metal materials.