{"id":3792,"date":"2024-03-19T15:39:00","date_gmt":"2024-03-19T14:39:00","guid":{"rendered":"https:\/\/www.henze-bnp.de\/unkategorisiert\/hebosint-sl-n-300-a-bn-sialon-addition-to-our-portfolio-part-2\/"},"modified":"2026-04-14T15:11:35","modified_gmt":"2026-04-14T13:11:35","slug":"hebosint-sl-n-300-a-bn-sialon-addition-to-our-portfolio-part-2","status":"publish","type":"post","link":"https:\/\/www.henze-bnp.de\/en\/focused-on-boron-nitride\/hebosint-sl-n-300-a-bn-sialon-addition-to-our-portfolio-part-2\/","title":{"rendered":"HeBoSint\u00ae SL-N 300: A BN-SiAlON Addition to Our Portfolio – Part 2"},"content":{"rendered":"\t\t
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The previous post focused primarily on mechanical properties. We examined the key parameters used to evaluate mechanical performance. Today, we\u2019ll discuss electrical and thermal properties. <\/p>

Since boron nitride crystals have a distinct plate-like shape, their orientation within the sintered body plays a significant role. This is also referred to as the anisotropy of hexagonal boron nitride, meaning a direction-dependent property profile. Depending on the orientation\u2014which can be perpendicular or parallel to the pressing direction of the sintered body\u2014the respective parameter varies. This plays a decisive role in both the mechanical and thermal design of a component.
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Thermal properties<\/strong><\/h3>

Thermal shock resistance: Many materials are sensitive to thermal shock. This means that sudden changes in temperature can cause the material to fail. This sensitivity is caused by internal stresses induced by temperature increases or decreases, as well as the relatively high brittleness of ceramics in general. Cracks or spalling are therefore the result. In addition to geometric boundary conditions, influencing factors include the coefficient of thermal expansion, the modulus of elasticity, thermal conductivity, and strength. For HeBoSint\u00ae SL-N 300, exemplary tests and customer applications have already demonstrated thermal shock resistance during rapid heating (e.g., due to sudden flooding with hot inert gas or contact with molten metal) and the retention of mechanical properties at temperature differences exceeding 1600 K.
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Thermal conductivity: Thermal conductivity describes the flow of heat through a material. For an electrical insulator, the thermal conductivity of boron nitride is comparatively high. In the case of HeBoSint\u00ae SL-N 300, the thermal conductivity is 27 W\/mK parallel to the pressing direction (i.e., through the platelet plane) and 45 W\/mK perpendicular to the pressing direction (in the platelet plane), both measured at 20 \u00b0C.
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Coefficient of thermal expansion: This material-specific value describes how the dimensional properties of a component change with temperature variations. HeBoSint\u00ae SL-N 300 achieves a maximum value of 4.6 [10\u207b\u2076\/K] parallel to the pressing direction and a value of 2.5 [10\u207b\u2076\/K] perpendicular to the pressing direction, measured over the temperature range of 20\u00b0C to 1500\u00b0C. <\/p>

Maximum operating temperature: The maximum operating temperature depends on the process gas. In air or in an oxidizing environment, HeBoSint\u00ae SL-N 300 remains stable up to approximately 900\u00b0C. At this temperature, the material begins to oxidize, which initially results in a weight gain. As the temperature rises, a weight loss can be observed, which is due to gradual decomposition. In an inert environment or under vacuum, HeBoSint\u00ae SL-N 300 is stable up to 1800\u00b0C.
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The electrical properties<\/strong><\/h3>

Spezifischer elektrischer Widerstand<\/strong>: Diese Messgr\u00f6\u00dfe gibt an, wie viel Spannung notwendig ist, um Strom einer bestimmten Amperezahl durch ein Material flie\u00dfen zu lassen. Die gro\u00dfe St\u00e4rke von Bornitrid als Isolator zeigt sich vor allem im Einsatzbereich h\u00f6herer Temperaturen. Bei vielen anderen Keramiken bricht der spez. elektrische Widerstand bei erh\u00f6hter Temperatur deutlich schneller ein. Im Falle von unserem HeBoSint\u00ae SL-N 300 liegt der Wert bei >10-15<\/sup> Ohm*cm. <\/p>

Dielectric strength: Dielectric strength describes a material\u2019s resistance to high voltage. In other words, it refers to the electric field strength at which a sudden current flow occurs because highly accelerated electrons ionize the material and \u201cbreak through\u201d it. HeBoSint\u00ae SL-N 300 also performs impressively in terms of dielectric strength. Parallel to the pressing direction, the value is approximately 100 kV\/mm, and perpendicular to the pressing direction, it is approximately 80 kV\/mm.
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Conclusion and Outlook<\/strong><\/h3>

In summary, we have now examined the mechanical, thermal, and electrical properties, and it is clear how these individual properties influence and interact with one another. In the next post, we will examine chemical resistance and gas impermeability. Once all the pieces of the puzzle have been put together, it will become clear what sets this material apart as a whole. <\/p>

If you would like to learn more or need advice, our technical sales team is happy to assist you. We would be happy to advise you and work with you to determine whether our HeBoSint\u00ae SL-N 300 is the right solution for you. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

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