The fundamental technique of gas atomization is that the high-temperature molten metal liquid flows out through the nozzle, and the high-speed airflow (such as argon) is applied at the outlet to atomize the liquid, then the atomized liquid droplets are cooled into spherical particles.
In recent years, the development of metal 3D printing technology has necessitated that metal powders possess good sphericity and narrow particle size distribution. Due to the fact that the shape and dimensional accuracy of the nozzle has a significant impact on process parameters such as airflow distribution and suction effect, the demands for the processing shape and dimensional accuracy of the nozzle are becoming increasingly stringent. Zirconia ceramics, silicon nitride ceramics, and alumina ceramics are currently the most prevalent ceramic materials used in gas atomization nozzles.
Due to sintering shrinkage, the existing zirconia, silicon nitride, and alumina ceramics are challenging to control the precision, and post-sintering processing is expensive. Therefore, new materials that are not only resistant to molten metal corrosion, high temperatures and thermal shock, but also possess machinability after sintering are urgently needed. Although pure boron nitride ceramic nozzles can satisfy the requirements of some powders, such as ferrosilicon, their corrosion resistance is insufficient for the manufacturing of high-nickel stainless steel and high-alloy steel powder materials containing titanium, molybdenum, and cobalt.
The hexagonal boron nitride composite at the core of our nozzles is renowned for its exceptional thermal shock and high-temperature stability. BN-2300 is a substance that keeps solid even when most metals melt, with a melting temperature above 3000°C, guaranteeing reliable performance even in the most trying circumstances.
Shape characteristics
nozzle's inner diameter Both the atomisation effect of the metal liquid flow and the rate of gas flow are directly influenced by the inner diameter of the nozzle. Usually, the particle size distribution of the metal powder is taken into account together with the dynamics of the gas in the inner diameter design.
Form of notches Round, rectangular, fan-shaped, and other shapes are among the many forms that boron nitride ceramic nozzles may be made into to suit a variety of atomization needs and application circumstances.
The shape and particle size of the powder are influenced by the interaction between the gas and the metal liquid flow, which is in turn influenced by the angle of the nozzle output.
The atomization effect is influenced by the acceleration process of the gas contained within the nozzle, which is in turn influenced by its length.
Surface finishing of the nozzle One way to improve the boron nitride ceramic nozzle's resistance to corrosion and wear is to treat its surface specifically.
Integrated cooling system for the nozzle: under some designs, an integrated cooling system may be included within the nozzle to guarantee that it keeps working correctly even under high temperatures.
The metal powder production area of use Applications for metal powders produced by boron nitride ceramic nozzles include electronic manufacturing, welding, spraying, and 3D printing.
The nozzle is a tool used in powder metallurgy to produce metal powders with a constant microstructure for the manufacture of high-performance components.
Using nozzles, thermal spraying is the technique of spraying molten metal to cover damaged areas or repair them.
The process of metal injection molding (MIM) uses nozzles to create highly precise metal powders for the purpose of creating small, complexly shaped components.
Aerospace companies employ nozzles to create high-performance metal powders that are subsequently used to make components that are strong and lightweight.
In the medical field, nozzles are used to produce the biocompatible metal powders needed for implants.
Vehicle manufacture: Metal powders for lightweight materials are produced by nozzles in the automotive industry. Both fuel efficiency and performance are improved by doing this.
production of Tools: High-performance tool steel powders are produced by nozzles in the production of tools, which are then used to make cutting, drilling, and other kinds.
Advantage
Temperature Performance: Our nozzles are made to easily withstand the high heat involved in atomization. Rapid heat dissipation made possible by Boron Nitride's high thermal conductivity (up to 15 W/mk at ambient temperature) preserves the nozzle's structural integrity and extends its useful life.
Reactivity to Chemicals: Our Boron Nitride Ceramic Nozzles' chemical inertness is a crucial characteristic since it prevents corrosion from harsh chemicals and molten metals. Because of this resistance, the metal powder is kept pure and of high quality by the nozzles not deteriorating or contaminating it.
Machinability and Customisation: Among ceramics, our nozzles are unique in that Boron Nitride is easy to machine. According to the particular needs of your atomization process, we can manufacture intricate geometries and exact dimensions. Whether you require standard or bespoke designs, our cutting edge production facilities guarantee that each nozzle satisfies the strictest requirements for accuracy and quality.
Utility in Application: Not merely metal powder manufacturing is possible with our nozzles. Their adaptability finds use in industrial, automotive, and aerospace manufacturing where erosion, thermal shock, and high-temperature resistance are critical.
Increased Productivity: Resists regular repair or replacement even under the harsh conditions of continuous operation.
Quality Assurance: By keeping metal powder pure, it guarantees its quality.
Cost-Effectiveness: Longer lifespan than traditional nozzles, less downtime and running expenses.
ABOUT US
UNIPRETEC is founded in 2011 and located in Xiamen, China. We develop, manufacture and process customized components as well as a comprehensive standard range of high-performance ceramics. Our products made of Aluminum Oxide (Al2O3) and Zirconium Oxide (ZrO2), as well as Boron Nitride (BN) and Silicon Nitride (Si3N4) with properties of high precision, wear resistance, corrosion resistance, electrical insulated, high temperature resistance, thermal shock resistance. Our products are widely used in applications like automotive industry, mechanical and plant engineering, energy technology, oil & gas industries, food, medical, chemical industries.
