[{"data":1,"prerenderedAt":73},["ShallowReactive",2],{"blog-application-of-hbn-in-igh-temperature-release-agents-en":3},{"id":4,"attributes":5},111,{"content":6,"createdAt":7,"updatedAt":8,"publishedAt":9,"slug":10,"title":11,"summary":12,"views":13,"locale":14,"cover":15,"cate_blog":60,"products":61,"seo":63,"author":70,"localizations":71},"\n\n![Metal casting mold release agent with high-quality finished parts](https://assets.chinareleaseagent.com/uploads/metal_casting_release_agent_1_4df8b62b9a.webp)\n\n\n\n## 1. Advantages of [Hexagonal Boron Nitride Release Agents](https://www.chinareleaseagent.com/metal-casting-release-agent)\n\n- **Extended mold life:**  \n  Effectively reduces mold wear and minimizes cleaning time. In glass processing, it helps reduce surface defects and improves demolding performance.\n\n- **Excellent high-temperature resistance:**  \n  Outstanding thermal shock resistance. It remains intact even after repeated rapid heating and cooling cycles at temperatures up to 1500°C. In protective atmospheres or vacuum conditions, it can be safely used at temperatures up to 2200°C.\n\n- **Low friction coefficient:**  \n  With a friction coefficient as low as 0.16, it does not increase at high temperatures and outperforms molybdenum disulfide and graphite in high-temperature environments.\n\n- **Superior chemical stability:**  \n  Resistant to reactions with most metals (iron, copper, aluminum, lead), rare earth metals, precious metals, semiconductor materials (germanium, silicon, gallium arsenide), glass, molten salts (cryolite, fluorides, slag), as well as inorganic acids and alkalis.\n\n- **Machinability:**  \n  With a Mohs hardness of 2, it can be easily machined into high-precision components using conventional processing methods.\n\n\n## 2. Applications of Hexagonal Boron Nitride Release Agents\n\n### 2.1 Application in Conventional [Glass Mold Release](https://www.chinareleaseagent.com/product/glass-casting-release-agent)\n\nThe IS (Individual Section) bottle-making machine has become the mainstream equipment in glass bottle production, operating at increasingly higher speeds. This demands higher performance from mold lubricants and release agents.  \n\nTraditional methods, such as manual or mechanical application of animal and vegetable oils, often deliver unsatisfactory results.  \n\nThe use of boron nitride lubricants significantly improves release performance. Currently, h-BN release agents are mainly classified into three types:\n\n- **Water-based systems:**  \n  Formulated with high-temperature binders and additives. Applied once to the mold surface and dried to form a durable lubricating film.\n\n- **Oil-based systems:**  \n  Mixed with additives and continuously applied or sprayed during machine operation.\n\n- **Emulsified oil systems:**  \n  h-BN is dispersed in high-viscosity mineral oil and emulsified with water. This type improves production yield, reduces consumption, and creates a cleaner working environment.\n\n![High-performance glass casting release agent ensures smooth surface on industrial glassware](https://assets.chinareleaseagent.com/uploads/glass_casting_release_agent_2_ea5e0409b7.webp)\n\n---\n\n\n### 2.2 Application in Optical Glass Mold Release\n\nHexagonal boron nitride is indispensable in the optical glass industry. At high temperatures, softened glass becomes highly chemically reactive, and traditional release agents may leave carbon residues or cause unwanted reactions.  \n\nh-BN release agents significantly improve both working conditions and product quality, especially in complex glass forming processes such as deep bending, irregular shapes, hot slumping, and polishing.\n\n- **Physical barrier:**  \n  Forms an ultra-thin, highly stable lubricating film that prevents adhesion between molten glass and precision molds (e.g., tungsten carbide, ceramic molds).\n\n- **Surface quality:**  \n  Ultra-fine particles ensure optical-grade surface smoothness for lenses, automotive display glass, and smartphone cover glass—eliminating the need for secondary polishing.\n\n- **Oxidation resistance:**  \n  At temperatures up to 900°C, it protects precision molds from oxidation and wear, significantly extending mold lifespan.\n\n---\n\n### 2.3 Application in Metal Casting, Smelting, and Welding\n\nHexagonal boron nitride offers excellent chemical stability. It is resistant to acids and alkalis, and in inert atmospheres (nitrogen or argon), its decomposition temperature can reach up to 2500°C.\n\n- **Continuous casting:**  \n  Used to manufacture BN separator rings for horizontal continuous casting of steel. At 1800°C, it remains stable against carbon and carbon monoxide and resists corrosion from molten glass, silicon, boron, non-oxide slags, and molten salts (borax, cryolite).\n\n- **[Titanium casting](https://www.chinareleaseagent.com/product/aluminum-alloy-release-agent):**  \n  Used as a composite coating for molds. Titanium is highly reactive at high temperatures, and during forging, fresh metal surfaces can easily adhere to molds. BN coatings prevent direct contact, avoiding mold sticking and material waste.\n\n- **Welding and brazing:**  \n  Protects workpiece surfaces from weld spatter and slag adhesion, improving product quality and reducing post-processing.\n\n![High-performance aluminum casting release agent ensures smooth lamp heat sink surface](https://assets.chinareleaseagent.com/uploads/aluminum_alloy_release_agent_3_04c13bf97f.webp)\n\n---\n\n## Conclusion\n\nIn summary, hexagonal boron nitride (h-BN), with its graphite-like layered structure and exceptional chemical inertness, has become an indispensable solution for high-temperature lubrication and release applications in modern industry.  \n\nFrom high-precision optical glass molding to demanding metal casting and forging environments, h-BN release agents outperform traditional lubricants. They not only act as a “protective shield” for molds but also as a “quality guardian” for finished products.  \n\nIn today’s push toward green manufacturing and industrial upgrading, selecting a high-performance boron nitride release agent means longer mold life, reduced downtime, and higher production yields.  \n\n**Looking for a more efficient high-temperature release solution for your process?**  \nOur technical team provides customized 1-on-1 product selection based on your equipment parameters and temperature requirements. Contact our experts today or [request a free sample for testing](https://www.chinareleaseagent.com/metal-casting-release-agent[Link](link)).","2026-03-20T01:49:30.622Z","2026-03-20T03:07:51.361Z","2026-03-20T02:19:06.802Z","application-of-hbn-in-igh-temperature-release-agents","Application of Hexagonal Boron Nitride in High-Temperature Release Agents","Boron nitride was first developed over 100 years ago. Among its polymorphs, hexagonal boron nitride (h-BN) is widely used as a high-temperature lubricant. It exhibits excellent smoothness, with an extremely low friction coefficient between particles.  \n\nEach atomic layer of h-BN consists of boron and nitrogen atoms, with no B–N bonds between layers. This allows the layers to slide easily over one another, resulting in superior lubricity and softness. These characteristics make h-BN highly suitable for high-temperature release agent applications.",null,"en",{"data":16},{"id":17,"attributes":18},579,{"name":19,"alternativeText":20,"caption":21,"width":22,"height":23,"formats":24,"hash":54,"ext":26,"mime":30,"size":55,"url":56,"previewUrl":13,"provider":57,"provider_metadata":13,"createdAt":58,"updatedAt":59},"blog_0320.webp","Optical glass molding using hexagonal boron nitride release agent for high-temperature precision forming","Optical glass formed with h-BN release agent, ensuring smooth surface finish and easy demolding under high-temperature conditions",800,480,{"small":25,"medium":36,"thumbnail":45},{"ext":26,"url":27,"etag":28,"hash":29,"mime":30,"name":31,"path":13,"size":32,"width":33,"height":34,"sizeInBytes":35},".webp","https://assets.chinareleaseagent.com/small_blog_0320_2ded8bbad2.webp","6be96ee99dbf934c2314da7471802573","small_blog_0320_2ded8bbad2","image/webp","small_blog_0320.webp",10.04,500,300,10036,{"ext":26,"url":37,"etag":38,"hash":39,"mime":30,"name":40,"path":13,"size":41,"width":42,"height":43,"sizeInBytes":44},"https://assets.chinareleaseagent.com/medium_blog_0320_2ded8bbad2.webp","5d5d4a517c72be9ce80145ac2aeb2cb9","medium_blog_0320_2ded8bbad2","medium_blog_0320.webp",16.06,750,450,16064,{"ext":26,"url":46,"etag":47,"hash":48,"mime":30,"name":49,"path":13,"size":50,"width":51,"height":52,"sizeInBytes":53},"https://assets.chinareleaseagent.com/thumbnail_blog_0320_2ded8bbad2.webp","c362dc5af703d00c3022e816413bb6f9","thumbnail_blog_0320_2ded8bbad2","thumbnail_blog_0320.webp",4.02,245,147,4020,"blog_0320_2ded8bbad2",19.34,"https://assets.chinareleaseagent.com/blog_0320_2ded8bbad2.webp","aws-s3","2026-03-20T02:14:03.940Z","2026-03-20T02:18:24.323Z",{"data":13},{"data":62},[],{"id":64,"metaTitle":65,"metaDescription":66,"metaRobots":67,"canonicalURL":68,"metaViewport":69,"metaKeywords":13,"jsonLd":13},825,"Hexagonal Boron Nitride Release Agent for High Temp Use","Discover hexagonal boron nitride release agents for high-temperature use. Improve mold life, reduce friction, and boost glass and metal processing efficiency.","index,follow","https://chinareleaseagent.com/blog/application-of-hbn-in-igh-temperature-release-agents","width=device-width, initial-scale=1",{"data":13},{"data":72},[],1776612077807]