Application Of Boron-Nitride in High Temperature Release Agent

Applied to the processing of highly difficult deep-bending, special-shaped, hot-melt, clear-bright and other curved glass, the effect is remarkable. It is also suitable for demoulding, release and lubrication of various metal processing such as metal forging, die-casting, aluminum extruded glass products, etc. It can also be used in welding and furnace brazing processes, which can protect the surface of the workpiece from being damaged by splashing of welding slag. Play a protective role in the metal welding process.

characteristic

1. Good lubricity: After special and fine powder blending, it can be strongly and effectively attached to the surface of the mold, forming an excellent lubricating effect. Because hexagonal boron nitride is absolutely smooth, the coefficient of friction between powders is very low, and each layer of its atomic structure contains boron and nitrogen, and there is no B-N bonding between layers, so the planes slide between each other, resulting in softness and Lubricant effect, very suitable for high temperature release agent application.

2. Prolong the life of the mold: effectively reduce the loss of the mold and reduce the time required for cleaning the mold. During the glass processing process, it can minimize the surface defects of the glass products and make the glass easier to demould.

3. Good operability: special spray formula, which can be evenly coated on the surface of the mold by hand.

4. High temperature resistance: excellent thermal shock resistance, even if the temperature is 1500 ℃ rapid heating and cooling repeated several times, it will not break, even if it is heated to 2200 ℃, it can still be used with peace of mind.

5. Fast drying speed: special quick-drying formula, fast drying speed, improving production efficiency and reducing costs.

6. Low coefficient of friction: friction coefficient u is only 0.16, does not increase at high temperature, is more resistant to high temperature than molybdenum disulfide and graphite, and can be used up to 800°C in an oxidizing atmosphere, and up to 2000°C under vacuum.

7. Good corrosion resistance: compatible with general metals (iron, copper, aluminum, lead, etc.), rare earth metals, precious metals, semiconductor materials (germanium, silicon, potassium arsenide), glass, molten salt (crystal stone, fluoride , slag), inorganic acids and alkalis do not react

8. Machinability: Its Mohs hardness is 2, so it can be processed into high-precision parts and components by general machining methods

Application：

With the rapid development of wine, food, beverage and other industries, the demand for various packaging glass bottles and jars has increased. The determinant bottle making machine has become the mainstream model of glass bottle production and is widely used, and the running speed of the determinant bottle making machine is getting faster and faster, and the requirements for the glass mold lubrication and release agent are getting higher and higher. The traditional method of lubricating and demolding glass molds uses manual or mechanical spraying of animal and vegetable oils, and the general effect is not good.

The boron nitride lubricating material is used to significantly improve the lubricating and demoulding effect. At present, the widely used boron nitride release agents are mainly divided into the following three categories:

The first type uses water as the medium and adds high-temperature adhesives and other additives to make water-based lubricants, which are brushed on the surface of the mold at one time and used after drying to form a film.

The other type uses oil as the medium and adds additives to make an oily lubricant, which is continuously brushed or sprayed during the operation of the determinant bottle making machine.

A commonly used boron nitride release agent is to coat high-viscosity mineral oil with boron nitride, and mix water under the action of an emulsifier to make an emulsified oil-type glass mold lubricating release agent. Boron nitride: oil: water = 1:4:10, when the amount of emulsifier is 7wt%, the prepared emulsified oil release agent has good stability, good release performance, and has the characteristics of thin oil film and uniform distribution. The use of boron nitride lubricating and releasing agent improves the yield of bottle making, reduces the consumption of lubricating and releasing agent, and purifies the production environment.

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Application of Boron Nitride Release Agent in Metal Casting, Melting and Welding

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Hexagonal boron nitride has excellent chemical stability and can resist the neutron radiation of nuclear reactors. It is not affected by acid and alkali. In an inert atmosphere (nitrogen or argon), the decomposition temperature is as high as 2500 ° C. It shows excellent performance under extreme conditions. Excellent chemical stability.

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Hexagonal boron nitride can be made into boron nitride separation rings (Figure 3) for horizontal continuous casting of steel. Hexagonal boron nitride is very stable to carbon and carbon monoxide at 1800 ° C, and is not corroded by molten glass, silicon, boron, non-oxide slag, molten salt (borax, cryolite) in steel.

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Hexagonal boron nitride can be made into a composite shell for titanium metal casting. The chemical stability of titanium metal is poor. When the forging is violently deformed at high temperature, the fresh surface produced by the metal flow is very easy to stick to the die, causing the forging and the die to be scrapped at the same time. The composite shell layer of boron nitride release agent is coated on the surface of the mold to avoid direct contact between the titanium metal and the mold.

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Hexagonal boron nitride can also be used in welding and furnace brazing processes, which can protect the workpiece surface from being damaged by spatter of welding slag, and can also play a protective role in the metal welding process.

Shengyang New Material Co., Ltd. is committed to the production of boron nitride and boron nitride processed products, and can customize various boron nitride insulating ceramic parts according to customer needs. Contact us if necessary.

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