Q:Are the black powders in the waste batteries poisonous? And zinc, graphite and so on

Nickel and nickel salt can cause metal heat, pruritus and eczema. A series of nickel carbonyl can cause headache, dizziness, heavy hair, gait instability, nausea, vomiting, chest tightness and paralysis of the nervous system, severe irritation of the respiratory tract, cause pulmonary edema.

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

Agree to the above point of view, add a little pressure speed is not fast, in 25mm/min, the bad words too fast exhaust will cause cracking, transverse fracture from your description of the phenomenon, most are not caused by the row of clean air.

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:Carbon fiber nylon bars differ from graphite rods

A carbon fiber conductive nylon nylon belongs to, is to add carbon fiber in nylon material. The carbon fiber component determines the strength and conductivity of the material. The conventional addition of 30% carbon fibers can reach 10 of the 3-6 sides, belonging to the conductive products. In addition, carbon fiber in addition to conductive, but also can play a wear-resistant role, the intensity will be greatly improved.

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

Instead, it is the lead, and use the pencil almost, but it is not like a pencil with a wooden package, is a core bare, so it is easy to break, the price is not expensive... The beginner is recommended to use the pencil lead is difficult to master the appropriate

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:What is Teflon graphite stick for?

Should be called graphite modified (reinforced, filled) PTFE bar, rod profiles are used for processing fine size parts. The material is made from polytetrafluoroethylene and reinforced with graphite reinforcing agent (or carbon fiber).

Q:Bought a high pure graphite stick, how so hard?! Doesn't it say that graphite is soft? Why is it so hard?

Of course, pure graphite rod is one of the main indicator is the strength and hardness of soft graphite refers to graphite can be used to write a relatively soft, you say should be soft flexible graphite, it is a kind of graphite,