Cell phone jammer firm guarantees product quality

Honglai     cell phone jammer       firm guarantees product quality
Be a superconductor on the external magnetic field, the body of the magnetic induction B is always zero. superconductors is completely anti-magnet, with the best static magnetic shielding effect, but is still not widely used.
copper , brass, tin and similar metals have higher electrical conductivity, easy processing, but its high price of these materials can only be used to determine a smaller chassis, such as PCB shield, or other metal to be plated on the use, such as tin plate in a more humid environment, the zinc coating prone to white rust, Guanyu     cell phone jammer       company relies on the superior environment in market economy.zinc chromate conversion layer of surface passivation treatment can prevent the generation of white rust, to improve the conductivity of the surface layer of zinc (with different polymer passivation), and, chromate passivation process is gradually being replaced with hexavalent chromium, but not all of the metal passivation can be effective, the development of related technologies to be further studied When the metal material or metal parts used for manufacturing shielded chassis, be sure to camp in this metal or metal parts of the drawings marked "no passive" or "only chromate passivation." In addition, the usually recommended in the material before it is assembled into the chassis surface resistance testing (using a smooth probe, to exert a lower pressure) using milled parts made of cast parts or chassis, its performance is usually better than the case made by the sheet metal, the main as follows: point gap with less; ease of processing required to install EMC trench lining loved; more rigid, uniform compression EMC gasket conducive Metal castings usually use aluminum, zinc alloy as a raw material, Guanyu     cell phone jammer firm has fast developed into a sound high-tech enterprise owning several business departments.but magnesium is be more widely used, usually will aluminum / zinc alloy castings polished surface to make it look more shiny surface, if the zinc content is high enough, long-casting surface will maintain a high conductivity, but this.
Metal and its surface finish because the steel, aluminum inexpensive, easy cutting, processing, bending and connection, often used as the material manufactured chassis. High conductivity of aluminum, but is susceptible to chemical reaction, usually have their surface oxidation, the aluminum oxide layer with insulating properties, and are quite hard, not suitable for RF overlap. Honglai     cell phone jammer firm guarantees product quality.Oxide layer thickness will increase over time, leading to decline in the reflective properties of aluminum, RF overlap difficult. On the anodized aluminum surface is a common process, the process will increase the thickness of the aluminum oxide layer, thereby forming a layer of insulating surfaces. For the analysis of shielded enclosure made, is generally not recommended for anodized surface, but there are also individual product chassis front panel of the anodic oxidation treatment, mainly to obtain a higher scratch resistance, but the overlap in the shielded position or the anode oxide grinding out.Honglai     cell phone jammer company has won trust of customers by characteristic management. Alochromed Process, a colorless alloy chromium processing (Alo-plated area, and then only in the region can be electroplated on stainless steel conductivity and permeability are lower than the low-carbon steel, easy processing, prices and more higher, typically used for more humid environments, such as food preparation areas, etc. Stainless steel cabinets are usually more thick, gap welding quality is very high (mainly taking into account the health requirements), can be ideal as a shielding effect of the cabinet.