With continuously improvement in the performance of electronic equipment in recent years, malfunction and mutual interference between the components are caused by unwanted electromagnetic wave (noise) in the machine.
So there is an increasing emphasis on measures to prevent electromagnetic interference. An effective measure is to use the electromagnetic wave absorbing materials. The electromagnetic wave absorbing rubber board DPR is successful developed now. It is the dual-phase rubber in use of metal powder technology. Its absorption principle is to transform the electromagnetic waves into the form of heat by the soft magnetic metal magnetic losses or eddy current loss.
Used as a soft magnetic metal powder processing and corrosion resistance, flame resistance is very good soft magnetic stainless steel powder, through processed into the shape of the foil aspect ratio to increase and anti-magnetic coefficient is small it has a very high magnetic conductivity. DPR is the foil sheet stainless steel powder dispersed in the composite electrical insulating rubber, the high frequencies above 1GHz better than ferrite electromagnetic wave absorption characteristics can change powder types, shapes, filling volume and product thickness to control its absorption characteristics.
The pressure of the powder magnetic core is made of molding the soft magnetic copper powder (FCu) and a mixture of insulating materials used for the power of the machine chokes like device. Usually the dust core is mostly made of Fe-Si-Al alloy or Mo permalloy single ingredient, but in recent years can not meet the diversified needs on the core. Therefore, the newly developed core powder is mixed with two or more different components of the soft magnetic alloy powder and an insulating layer coated on the surface of the alloy powder cores with powder. This core of powder soft magnetic alloy powder by adjusting the mixing ratio, powder size distribution, stamping and heat treatment optimization. It can control its magnetic properties in many aspects.
There are two classes of powders for magnetic core. One of them is the core chokes material for switching power supply and other power supply. It is suitable for high frequency range from tens of kHz to hundreds of kHz. The other on is suitable for frequency in a few of kHz. In particular, it requires for the use of high magnetic flux density, such as high-speed motor core and electromagnetic valve core for automotive electronic fuel injection equipments.Source:http://www.mhcmp.com
The application of tungsten in various industries
Steel Industry Most of tungsten applied in the production of special steels. The widely used high-speed steel was containing 9-24% of tungsten, 3.8-4.6% of chromium, 1-5% of vanadium, 4-7% of cobalt, 0.7-1.5% of carbon.
Magic effects of coconut oil
According to records, coconut oil can be regarded as the nobility of skin care plant extracts. It was rich in exotic tension of tropical plants, which can enhance the contractile force of the pores, perfectly beautify and nourish the skin.
Exploring the Potentials of Nano-Aluminum Powder
Nano-aluminum powder, a material with remarkable properties due to its minuscule particle size, is revolutionizing various industries with its high reactivity and large specific surface area. Unlike its bulk counterpart, nano-aluminum powder begins to oxidize at a lower temperature of 550°C, compared to the 950°C oxidation point of ordinary aluminum. This lower ignition energy and full combustion without apparent cohesion make it a superior choice for applications requiring high energy and efficiency. The unique characteristics of nano-aluminum powder, such as faster burning rates and greater heat release, are largely influenced by its synthesis method, which determines its particle size, surface area, and shape.
