Q:Where is the PN junction of point contact diode?

I think so, the band gap of metal wire drawing; and N type germanium band gap is relatively wide, there are a large number of free electrons near the bottom of the conduction band; when the two contact, N type electronic piece of germanium in the conduction band are more likely to run to the metal conduction band, which is equivalent to the directional movement of free electrons.So the PN junction should be on both sides of the contact surface.

Q:What is the iron chromium aluminum wire

Iron PTCRs aka electrothermal alloy, has high resistivity and temperature coefficient of resistance is small, the use of high temperature, under high temperature, good corrosion resistance, especially suitable for use in containing sulfur and sulfide in the environment, and the price is low.

Q:Can aluminium wire be used as an electric stove wire?

But if the temperature is not too high, ordinary wire is also used as an electric heating wire.

Q:Which heat transfer is copper wire, wire or aluminum wire fast?

The thermal conductivity of brass is 92.8 W/ (M2 * K); the thermal conductivity of aluminum is 203 W/ (M2 = K); the heat conductivity of mild steel is 46.4 W/ (M2 ? K)Therefore, the heat transfer speed: aluminum wire > copper wire > iron wire

Q:Why not use copper, iron, aluminum wire instead of fuse?

Their melting point is greater than or equal to the melting point of the wire, so it can not cut off the current. It burns the circuit or electric appliance. Therefore, copper, iron and aluminium wire can not be used instead of the fuse

Q:How to tell how thick the wire is?

The so-called 1 square wire mm, refers to the single stranded (BV) core sectional area is 1mm - line, which is based on the relationship between PI and the diameter of the calculation to.

Q:General ferrochrome aluminium net with what material?

Ferrochrome aluminium net commonly used 134 ferrochrome aluminium net (grade 1Cr13AL4 high temperature 1000 degrees below) and 255 (grade 0Cr25AL5, iron chromium aluminum net temperature of 1000 degrees above two) is most commonly used in iron PTCRs grades 1Cr21AL4, 0Cr21AL6, 0Cr23AL5, 0Cr21AL6Nb, 0Cr2AL7Mo2. Material can be chosen according to customer's requirements.

Q:What are the factors associated with the speed of the reaction between aluminum and acids?

From the experimental comparison, the higher the concentration of hydrochloric acid, the shorter the reaction time, and it is known that the reaction between aluminum wire and 3% hydrochloric acid takes 300 seconds;

Q:There is a small hole in the stainless steel pan. Can you mend it?

To the processing of stainless steel products shop with stainless steel electrode welding as well, glue trap properly don't because the plastic is toxic.

Q:How to understand the size of bonsai, the size of the corresponding use of aluminum wire thickness?

The iron wire is mainly used to keep the growth direction of the trees. Therefore, the size of the wire depends mainly on whether it can fix the location of the trunk.