BN-2300 is a composite boron nitride material that was developed by our company after years of practice and research. BN-2300 can effectively improve the thermal shock resistance and toughness of the nozzle, and reduce its deformation; simultaneously, it has a high density that is helpful to improve the erosion resistance of the nozzle, increase the corrosion resistance to high-temperature metals. Therefore, it can reduce  the nozzle clogging phenomenon, prolong the nozzle's service life, and make sure the spray belt is uniform.

Among the main components of the nozzle, Al2O3 has great cohesive force and spallation resistance. At room temperature, the liquid phase generated by Al2O3 can effectively bond BN, ZrO2, and SiC particles, preventing the tendency of cracks to develop and propagate on the surface of grains when the material matrix is subjected to external forces.  At high temperatures, Al2O3 reacts with oxides on the surface of SiC to generate an aluminosilicate liquid phase, which facilitates the sintering densification of SiC ceramics. Al2O3 and ZrO2 can also form eutectic phenomenon at high temperatures, which is conducive to the retention of ZrO2 tetragonal phase, enhances the uniformity of sintered density, increases the flexural strength of zirconia and maximizes its toughening effect.

Besides, CaZrO3 has outstanding thermal and chemical stability. When heated to 1750 °C under reducing conditions, CaZrO3 is still highly stable; and at 1500 °C, it has no reaction with the oxides like Al203 and ZrO2 in this product. The addition of CaZrO3 increases the thermal shock resistance, ablation resistance, and mechanical characteristics of the product. Meanwhile, the addition of CaZrO3 can effectively prevent or reduce the metal oxidation reaction caused by the contact between nozzle and the sprayed molten steel, as well as increase the spray belt's quality and the nozzle's service life.

The best stabilizer for ceramic materials is yttrium oxide. In boron nitride composite nozzles, yttrium oxide has a very stable affinity with zirconia, silicon carbide, and boron nitride. The addition of yttrium oxide improves the nozzle's bending strength and fracture toughness while also enhancing the nozzle's thermal shock resistance.

Features

Extremely durable, boron nitride ceramic nozzles can withstand long-term wear and tear while still retaining the nozzle's precision and performance.

High temperature resistance: Used in hot industrial settings, boron nitride ceramics may tolerate temperatures as high as 2000°C.

Chemical stability: Most chemicals may be corrosion-resistant well against boron nitride ceramics, which also don't readily react with the spraying media.

strong thermal conductivity: The strong thermal conductivity of boron nitride ceramics facilitates the fast transmission of heat and increases cooling efficiency.

Low thermal expansion coefficient: When the temperature fluctuates, the nozzle's dimensional stability is preserved in part by the low thermal expansion coefficient of boron nitride ceramics.

Excellent electrical insulators, boron nitride ceramics are appropriate for industrial settings that might have electrical interference.

Self-lubricating characteristics of boron nitride ceramics reduce friction and wear during use.

Thermal shock resistance: Extreme temperature conditions may be tolerated by boron nitride ceramic nozzles, which can also sustain quick temperature swings.

Biocompatibility and non-toxicity: Ceramics made of boron nitride are non-toxic and kind to both the environment and human body.

Easy to process and form: With the use of contemporary processing techniques, nozzles of different complicated forms may be created from boron nitride ceramic materials.

Applications

Main applications of boron nitride ceramic nozzles in the synthesis of amorphous alloy strips are:

Quick cooling: The boron nitride ceramic nozzle is used to spray the cooling medium during the strip's quick cooling to cause the alloy to solidify quickly.

Precise injection: The nozzle design permits accurate cooling medium injection to guarantee strip performance uniformity and uniform cooling.

Spraying protective atmosphere over the strip's surface to stop oxidation or other chemical reactions is another usage for boron nitride ceramic nozzles in certain manufacturing processes.

Production of amorphous alloy strip: To accomplish quick solidification of the strip, cooling media is sprayed throughout the production process.