People have adjusted the set of cell phone jammer already

The core material of the magnetic field lines along a direction adopted, if appropriate cutting silicon steel, and then wound into the core, making the circumference direction of the core happens to be the best direction of the magnetic properties of silicon, then the core of the magnetic permeability will be high, easy magnetization, the energy loss small, and ultimately improve the efficiency of the transformer. China is the number of silicon steel:And people have adjusted the set of cell phone jammer already. Hot-rolled silicon steel sheet D (3.1% silicon, such as D31 refers to the hot-rolled silicon steel); cold-rolled silicon steel DT; oriented silicon steel with high magnetic induction Q and QG These magnetic materials can be related to books and manuals to be. permalloy: permalloy refers to iron-nickel alloy, nickel content of its wide range, between 35% -90%. permalloy most prominent feature is a weak magnetic field with high permeability. their saturation magnetic flux density is generally 0.6 - 1.0T between the most simple permalloy is composed of two elements iron and nickel alloys, rolling and heat treatment through appropriate So do not use the cell phone jammer mutually. They can have high permeability, but also can be reasonably content with the iron and nickel, to obtain a relatively high saturation magnetic induction, but this low resistance of permalloy, good mechanical properties, so not many practical applications At present a large number of applications of permalloy is based on the iron-nickel add some other elements, such as molybdenum, copper, etc. The purpose is to add these elements to increase the resistivity to reduce eddy current losses after core made of. At the same time, add elements can also increase the hardness of the material, which is especially useful as the head, which are worn applications. Permalloy production process is relatively complex, for example, plate rolling process, the annealing temperature, time, speed of cooling after annealing and so the final magnetic properties of materials has great influence.cell phone jammer could be used for public security. permalloy our grades are 1JXX. which, J said, "Precision Alloy", "1" soft, the latter figure number, usually expressed in the alloy nickel content, such as 1J50, 1J851, etc. permalloy with high permeability, so often used in high-frequency transformer core or have strict requirements on the sensitivity of the device, such as high-frequency (tens of KHz) switching power supply transformer , precision transformer, transformer leakage switch, magnetic shielding, magnetic yoke and so on. Electromagnetic compatibility of electronic equipment or system is one of the main performance, electromagnetic compatibility equipment or system design is to achieve the required functionality, so that system performance into full play an important guarantee must be in the device or system functional design, while the electromagnetic compatibility design Electromagnetic compatibility is designed to enable the design of electronic equipment or systems in the expected electromagnetic environment to achieve electromagnetic compatibility. cell phone blocker could be applied in anti-terrorism.The requirement is to make electronic equipment or system to meet the requirements of EMC standards and the ability to have two aspects: 1. can be expected electromagnetic environment to work, without performance degradation or failure; 2 on the electromagnetic environment is not a source of pollution. as a realization of electromagnetic compatibility, must examine the following five questions: First, for the study of electromagnetic interference sources, including electromagnetic disturbance the source of the frequency domain and time domain, resulting in the inhibition mechanism and measures of the study.