According to a recent report by the American Physicists Organization Network, Australian scientists reported in the latest issue of the Physical Review Letter that they have developed a new metal compound with properties similar to glass, and used it to replace plastic and carbon nanotubes. A new field emission electrode is made. The field emission electrode can produce a stable electron beam, which is expected to be used in consumer electronics and electron microscopes.
Previously, scientists mainly manufactured field emission electrodes by embedding carbon nanotubes and other nanomaterials in plastics. Although these field emission electrodes are diverse and easy to manufacture, and have great application potential, they also have many flaws. For example, the conductivity of plastic is too weak; the thermal stability of plastic is very low, and it cannot resist the large amount of heat generated by long-term operation.
Now, the research team of Monash University in Australia and the scientists of the Institute of Process Science and Engineering under the Australian Commonwealth Scientific and Industrial Research Organization have developed a new material with great application potential and easy to manufacture-amorphous block Metal glass (ABM), and use it instead of plastic to make field emission electrodes. When these amorphous bulk metal-glass alloys cool, they form amorphous materials, making their movements more like glass.
This amorphous bulk metal glass alloy is made of magnesium, copper and rare-earth element gadolinium, and has many unique characteristics of plastics; it can conform to many shapes and be manufactured in large quantities and can be used as an effective matrix for carbon nanotubes. In addition to having excellent electrical conductivity, this metallic glass also has very stable thermal properties, which means that it can maintain its shape and durability even when subjected to high temperatures. Scientists said that the above many advantages and its excellent electron emission properties make this amorphous bulk metallic glass one of the best materials for manufacturing electron emission devices.
Although some scientists have previously developed other composite materials composed of large pieces of metallic glass and carbon nanotubes, this is the first time such a system has been used to manufacture functional devices such as field emission electrodes. Scientists say this technology can be used to manufacture electron microscopes, microwave and X-ray generation equipment, and modern display equipment.
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