What is polarization, and what is polarization and depolarization?

Polarization refers to the phenomenon that things are polarized under certain conditions, so that their properties deviate from their original state. For example, when a (net) current flows through the electrode such as molecular polarization (increase of dipole moment), polarization of light (polarization), electrode polarization, etc., the electrode potential deviates from its equilibrium value, which is called polarization. According to the direction of the current, it can be divided into anodizing and cathodizing.

Polarization refers to the fact that once the corrosive action of the battery begins, the speed at which the electrons flow is greater than the speed at which the electrodes react. At the anode, the electrons flow away, and the ionization reaction does not catch up with the replenishment; At the cathode, the electron inflow is fast, and the cathode reaction to take away the electron cannot catch up, so that the anode potential is shifted to the positive and the cathode potential is negative, thereby narrowing the potential difference and slowing down the corrosion. In general, some corrosion inhibitors can be used and added to the aqueous solution to promote polarization.

This kind of added substance that can promote anodic polarization is called anodic corrosion inhibitor. It can promote cathodic polarization is called cathode corrosion inhibitor.

The phenomenon in which the electrode potential deviates from the equilibrium electrode potential when an electric current passes through the electrode is called electrode polarization. Polarization leads to a decrease in the voltage between the positive and negative electrodes of the battery after it is connected to the circuit, and also leads to an increase in the voltage required by the plating and electrolyzer after it starts working. Both are disadvantageous, so we need to minimize polarization.

The precipitation potential (positive value) on the anode is corrected compared with the theoretical precipitation potential; The precipitation potential on the cathode is more negative than the theoretical precipitation potential, and we call the phenomenon of the actual potential deviating from the theoretical value polarization, and the difference between the actual precipitation potential and the theoretical precipitation potential as the overpotential or overpotential.

The phenomenon of polarization refers to the fact that when there is a current passing through the battery, the battery electrode potential deviates from its equilibrium electrode potential, so that the terminal voltage of the battery is higher than its resting electromotive force.

Posture can generally be divided into two parts: static is the relative static state of the human body for a certain period of time.

Polarization: The crystals are anisotropic.

Amorphous is isotropic.

Target. Some crystalline media are deformed by mechanical force in a certain direction, which produces a polarization effect;

When the mechanical force is removed, it will return to an uncharged state, that is, when under pressure, some crystals may produce an electric effect, which is called the polarization effect. It is based on this effect that scientists developed piezoelectric sensors.

Piezoelectric sensors are one of the most commonly used sensors in industrial practice, and we usually use pressure sensors.

The piezoelectric effect is mainly utilized.

manufactured, such sensors are also called piezoelectric sensors.

Piezoelectric sensors are developed in accordance with the "polarization effect" and "piezoelectric effect".

Polarization: refers to the phenomenon that things are polarized under certain conditions, so that their properties deviate from their original state.

Depolarization: Also known as depolarization, it refers to the change trend or resting potential of the polarization state of the membrane.

Change in the direction of decreasing intramembranous negative values.

Reverse polarization: cell membranes.

The potential changes from positive on the outside and negative on the inside to negative on the outside and positive on the inside. When the membrane changes from 0 mV to 20-40 mV, it is the reverse polarization process.

Hyperpolarization: refers to a physiological state of nerve cell membranes. The intramembrane potential is greater than 70 millivolts, reaching 80 millivolts, or even 90 millivolts.

Repolarization: is at the action potential.

In the process of occurrence and development, the potential from the state of reverse polarization is restored to the resting state of positive potential outside the membrane and negative potential in the membrane.

Classification of Polarization Electron Polarization: A cloud of electrons under the action of an external electric field.

Relative to the nucleus.

A slight displacement occurs so that the electrically neutral atom forms a very small electric dipole.

Ion polarization: Under the action of an external electric field, the positive and negative ions that make up the molecule undergo a slight displacement, causing the molecule to form a small electric dipole.

Orientation polarization: Under the action of the external electric field, the polar molecules that were originally disordered are changed to be arranged in an orderly manner, forming a resultant moment.

Generally, monoatomic media have only electronic polarization, all compounds have electronic polarization and ionic polarization, and some compound molecules have intrinsic moments and have other three polarizations at the same time.

Under the action of an electric field (an external electric field or the charge of the ion itself), the electron cloud of the ion changes, creating a dipole or increasing the original dipole, a phenomenon called ion polarization. In addition to the electrostatic attraction between ions, there are other forces. Cation.

Generally, the radius is small and positively charged.

It is sensitive to adjacent anions.

It will act as an inducer to deform it (polarization).Anions generally have a large radius and a good trace of more negative charges on the periphery, so they are prone to electron cloud deformation (deformability of ions) under the action of the electric fieldIn fact, each ion has the dual property of polarization, which deforms opposite ions, and deformation, in which it is deformed by the action of other ions.

Cations with a large charge number and a small radius have a strong polarization effect. It has 18 electron shells.

and ions of irregular electron shells, which are much more deformable than inert gas-type ions of similar radius. For example, ag+ k+; hg2+＞ca2+.4.

For ions with the same structure, the more positively charged, the less deformable the cation, and the more electron layers, the greater the deformation. Large anions and less charged cations (e.g., Ag+, Pb2+, Hg2+) in 18-electron or irregular electron shells are the most susceptible to deformation. The most difficult to deform are inert gas cations with small radius and high charge (such as BE2+, Al3+, Si4+, etc.).

Ionic polarization is linked to chemical foci.

Influential. The cations and anions are polarized with each other, giving them an additional force of attraction to occur. So when the two ions are *closer, it is possible to make the electron clouds of the two ions overlap each other, tending to form less polar covalent bonds.

The change of bond type will inevitably affect the properties of the compound. Generally, with the increase of polarization, the melting point and boiling point of the substance decrease, the color deepens step by step, and the solubility in water. Minish.

Explanation of polarization.

1) [polarization]

2) Gas precipitation that increases the resistance and produces back electromotive force on one or two electrodes of the electrolytic cell (3) The effect of electrons and nuclei in atoms and molecules when they produce a small relative displacement in the electric field Detailed explanation On the plates of batteries and electrolysis devices, due to the action of electric current, gas adheres to the surface, so that the current cannot flow normally, this phenomenon is called polarization.

Word decomposition Explanation of pole pole (pole) ítop, highest point, end : ascend to the pole (emperor ascends the throne). Get to the top of the ladder.

Refers to the north and south ends of the earth or the positive and negative ends of circuits and magnets: the polar regions (regions within the polar circle). Polar circle.

North pole. Cathode. End, reach the apex:

Strongly. The polar eyes are overwhelmed. The pendulum will swing.

The highest, the interpretation of the nature à nature or morphology of the town change : change. Split apart.

Rigidity. Teaching. Melt.

Melt. Exert a subtle influence on. Turn dry into jade silk.

Buddhists and Taoists collect money: turning into a relationship. Fasting.

Used after a noun or adjective, it indicates a transformation into a certain nature or state: ugliness. Greening.

Customs, wind.