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Application of New High Temperature Resistant Boron nitride

Boron nitride is a widely used chemical products, the first came in more than 100 years ago, boron nitride is not only its structure and its performance is also very similar to graphite, and its own white, so commonly known as: white graphite. From China, boron nitride development by leaps and bounds, in 1963 began BN powder research, developed in 1966 success, in 1967 and put into production and applied to China's industrial and cutting-edge technology, Yingkou Tanyuan Chemical is the first to engage in boron nitride Fine chemical R & D and production of one of the enterprises.

A group of researchers at Pennsylvania State University said a new type of lightweight composite material can be used in flexible electronic equipment, electric vehicles and aerospace applications in the energy storage applications, in the adaptable high temperature operation, Far higher than the current commercial polymer. This polymer-based ultra-thin material can be used already in the industry using the corresponding technology to produce. This is part of a series of work done in capacitors with high temperature dielectric laboratories. Prior to this work, a composite material of boron nitride nanosheets and dielectric polymers has been developed, but it is recognized that there are scales to scale economies.

The above figure shows a polyetherimide with hexagonal boron nitride (HBN) nanofilms, which is significantly superior to the relevant competitive materials. The available temperatures are the needs of electric vehicles and aerospace applications. The Source: Pennsylvania State University's scalability or the manufacture of advanced materials on business-related equipment has been a challenge for many new 2D materials developed by academic laboratories. "From the soft material point of view, 2D materials are fascinating, but how to mass produce them is a problem," Wang said. In addition, the ability to combine them with polymeric materials is a key feature of future flexible electronic applications and electronic devices.

"The hexagonal boron nitride is a wide bandgap material with high mechanical strength, and its wide bandgap makes it a good insulator to protect PEI films from dielectric breakdown at high temperatures, which is why other polymer capacitors fail. At the operating temperature of more than 176 degrees Fahrenheit, the best commercially available polymers are beginning to lose efficiency, but hexagonal boron nitride-coated PEI can work efficiently at 392 degrees F. Even at high temperatures, the coating PEI 55000 charge and discharge cycles remain stable. "Theoretically, all of these polymers exhibit high performance, both of which have high commercial value and can coat a layer of boron material to prevent charge injection," said Wang. I think this will make this technology feasible in the future commercialization. "Alem said," the use of two-dimensional crystal production equipment in the laboratory a lot, but the defects so that they exist manufacturing problems.

There is a large bandgap material, such as boron nitride, which does well, although the function of small microstructures may not be ideal. The first principle of the calculation determines the electronic barrier in the PEI / hexagonal boron nitride structure and the interface of the metal electrode applied to the structure to provide the current is significantly higher than the typical metal electrode of the contact form of the dielectric polymer, making it more difficult Charge is achieved by electrode injection. This work was completed by Professor Long-QingChen and Professor Donald W.Hamer of Materials Science and Engineering at the University of Pennsylvania. Return list


    【Keywords in the article】:ferrocene polyvinyl butyral boron nitride ammonium perchlorate copper chromite htpb musk pvb HX-752
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    2017-09-19 17:30:17
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