Q:Why does the temperature rise when the graphite powder is turned on?

What is the value of resistance, and this value is not an accurate number, because the graphite powder thickness is not the same, used in different materials and environment, graphite powder, resistance value will be different.

Q:How does graphite powder look good or bad?

The graphite powder is soft, black and gray, greasy and polluting paper. Hardness is 1~2, along the vertical direction with the increase of impurities, its hardness can be increased to 3~5. The specific gravity is 1.9 ~ 2.3. Under isolated oxygen conditions, the melting point is above 3000 degrees Celsius and is one of the most refractory minerals. At room temperature, the chemical properties of stone toner are relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents. The material has high temperature resistance and conductivity, and can be used as refractory materials, conductive materials, wear-resistant and lubricating materials.

Q:How do you use graphite powder in copper?

This question is a bit vague, you can say it, is inlaid with copper and graphite, the graphite powder melt into the copper, if it is the former, is easy to do, if it is the latter, it is necessary to copper melting after adding graphite powder, the latter is relatively difficult.

Q:Graphite powder what is the difference?

So the pencils are not made of lead, but made of graphite, which prevents the children from damaging their bodies by biting their pencil heads. Hope to adopt!

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:What is the ratio of the coated sand to the graphite powder? How to improve the refractoriness of precoated sand

General additives accounted for 0.1-0.5 of the original sand weight. Different demand, of course, the proportion is not the same, there is no fixed number.

Q:Why does an electromagnetic point timer not prick a needle and use toner paper?

With the needle point than the powder paper friction, many experimental results of!

Q:Can you tin to latex paint

Latex paint and self spray paint are not rustproof against iron. The main component of antirust paint is antirust pigment and film forming material. Usually in the name of anti rust paint named, such as: rustproof paint, antirust paint, iron oxide red. If it is divided into four categories: antirust, paint, chemical action, antirust paint, electrochemical action, antirust paint, comprehensive function antirust paint.

Q:Does graphite allow lubrication of rusted doors?

Sure。 When we were young, the teacher reminded us that we could use the pencil core to scrape the end and put it into the keyhole to lubricate it.

Q:Crystal graphite of graphite powder

At room temperature, lambda A is about 200 times larger than lambda C. As the temperature increases, this ratio decreases, but remains large. Therefore, the thermal conductivity of polycrystalline graphite composed of microcrystalline is controlled by the thermal conductivity of microcrystalline layer lambda a, and lambda C can hardly be considered. The lambda a of natural flake graphite is between 280 and 500W/ (m * K) at room temperature. The ratio of lambda a/ lambda C is between 3~5, so the perfection of crystal is far better than that of high directional pyrolytic graphite.