Q:What is the simple test method for graphite powder used in casting?

Graphite is carbon,. It can be detected by combustion..

Q:Why is there a range of electrode powder powder resistivity? The reasons for the high and low are not good.

Read millivolt values and sample height, calculated according to the formula P =UA/IL type resistivity. The resistivity of the conductor is in P, Omega - M; L for voltage measurement distance between two probes for m; A for the conductor cross-sectional area, m2; U, the voltage between two probes for the determination of voltage V; I the strength of the current flowing through the conductors, the resistivity of A. graphite is (8 ~ 13) * 10-6 (/m), high - low note inside magazines. For reference only!

Q:Are graphite powders soluble in water, dilute acids, dilute bases, and organic solvents?

At room temperature, the chemical properties of stone toner are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents;

Q:Why can graphite powder conduct electricity?

Dense crystalline graphite is also called massive graphite. These crystals are crystalline and visible to the naked eye. Particle diameter greater than 0.1 mm. The crystals are arranged in a dense and blocky structure. The graphite is characterized by a very high grade, general carbon content is 60 ~ 65%, sometimes up to 80 ~ 98%, but its plasticity and unctuousness as fine flake graphite.

Q:The difference between silicone and silicone?

Silicone grease and silica gel although only two words in the literal sense, and all the thermal materials, but two things is completely different. Relatively speaking, the scope of the grease has a slightly wider, need to fit almost any cooling conditions; and because the silica gel once it is stuck on difficult to remove, so most of the time is used in some occasions only need one-time adhesion, heat sink such as graphics memory and memory of the particle particle. The main use of silica gel is bonding agent. We need to buy is the main heat conduction effect of silicone grease, you can not buy the wrong.

Q:What are the hazards of inhalation of graphite dust?

Personally think: black carbon on the human body, and the extent of the time has a lot to do with. On the human body caused by short-term damage is limited to a certain extent, can be restored (but the inhaled particles are difficult to be excreted); over the long term, great harm to the human body, but also can not be restored. Heavy inhalation of carbon black dust can at least cause carbon black, dust, and lung disease (occupational disease, pneumoconiosis). Included in the pneumoconiosis in China: silicosis, coal worker's pneumoconiosis pneumoconiosis, graphite, carbon black pneumoconiosis, asbestosis, talc, mica, cement pneumoconiosis pneumoconiosis pneumoconiosis, Potter's pneumoconiosis, aluminum pneumoconiosis, welders' pneumoconiosis, graphite pneumoconiosis etc.)! At present, the world's lack of treatment for pneumoconiosis, suffering from pneumoconiosis equivalent to sentenced to death. The number of pneumoconiosis patients in our country is equal to that of pneumoconiosis patients in other parts of the world. Please pay more attention to it and don't inhale any more

Q:Influence and protection of graphite dust on electrical equipment in workshop

Graphite powder is very easy to cause static electricity and short circuit, especially for the weak point, the graphite powder must be filtered out, or the electric distribution box is placed separately.

Q:The principle of a graphite missile

When graphite sticks to point wires, numerous circuits are formed, but they are short circuited.So the circuit was broken.

Q:How does graphite powder solidify into a lump? What bond is best used?After solidification can be more than 1000 degrees high temperature does not change

There is no binder that can withstand 1000 degrees C. At such a high temperature, any binder has been carbonized and has lost its bond effect, so it is impossible if you want to use the binder to make the graphite powder into pieces

Q:Can I use super fine stone powder in grease or lubricating oil?

Can be pro, ultra-fine stone toner itself has a lubrication function, in Qingdao Huatai graphite section for grease and lubricating oil, you can look at, do not understand, you can ask me.