EdgeTech Industries LLC.

Magnetism is the basic property of matter as well as force, heat, electricity and light. Materials with ferromagnetism are usually called magnetic materials. The biggest characteristic of magnetic materials is the hysteresis behavior, that is, the magnetization M changes with the external magnetic field. When H returns from a certain state to zero, M still maintains a certain size. Only when the magnetic field is applied in the opposite direction M drops to zero, so that the reciprocal change of M with H is a loop instead of a single curve. Figure 1-1 shows a schematic diagram of a typical hysteresis loop. The main parameters describing the characteristics of the hysteresis loop are: (1) Residual magnetic induction Br, (or residual magnetic polarization Jr=AMr) (remanent magnetism for short) is the magnetic flux density when the magnetic field H=0 in the magnet; (2) The coercive force HcB (or intrinsic coercive force HcJ) is the reverse magnetic field H necessary for the magnetic...

The production efficiency of boron nitride produced by chemical vapor deposition is high, but this method is easy to introduce pores and impurities into the sintered body and anisotropy caused by hot pressing. This makes its application very limited, especially in high temperature and oxidizing environments. Pyrolytic boron nitride materials have excellent physical and chemical properties. Chemical vapor deposition (CVD) is an ideal choice for the preparation of high-purity and dense boron oxide materials. The structure, morphology and properties of the prepared pyrolytic boron nitride (PBN) may depend to a large extent on the process conditions. Most boron nitride prepared by chemical vapor deposition (CVD) is thin film, powder, etc., while bulk boron nitride is limited to highly anisotropic pyrolytic boron nitride, which cannot fully utilize the characteristics of structural diversity. The synthesis of boron nitride limits its application in a wider field. Therefore, there are relat...

Pyrolytic boron nitride is an anisotropic high-temperature ceramic with high electrical resistance and good thermal conductivity. It is suitable for applications requiring high strength, low thermal expansion coefficient and good thermal shock resistance. Pyrolytic boron nitride also has thermal shock resistance and is a superior sealant that protects graphite from corrosive environments, such as most molten metals, acids, and hot ammonia environments. It has been verified that pyrolytic boron nitride is also a very effective insulating material. Pyrolytic boron nitride is non-toxic and harmless under normal conditions, has no porosity, and has high purity, so it is easy to store and easy to process into crucibles, evaporation boats, plates, pipes, bottles and other utensils. Pyrolytic Boron Nitride (PBN) belongs to the hexagonal crystal system. It is an advanced ceramic material with a purity of 99.999%, acid and alkali resistance, oxidation resistance, good thermal conductivity, co...