Boron Nitride Crucible

Hexagonal Boron Nitride Ceramic Introduction

  Boron nitride machinable ceramic is a unique material that demonstrates exceptional thermal stability at high temperatures, high electrical insulation, and superb chemical resistance as it reacts with few substances. It possesses excellent machinability, allowing for precise shaping and intricate geometries even for complex crucible designs. With a low coefficient of friction, boron nitride ceramic machines easily and is ideal for applications requiring lubricated interfaces. The material also effectively conducts heat while exhibiting low dielectric losses, enabling it to efficiently dissipate heat as an electrical insulator from dense components. These properties including thermal conductivity, electrical insulation and corrosion resistance support boron nitride ceramic's diverse applications in various demanding industries like electronics, aerospace and transportation that utilize it for applications involving thermal management, insulation for crucibles, and corrosion resistance where high-performing engineering materials are necessary.

  To produce hexagonal boron nitride (HBN), boron nitride powder/flake is sintered into a solid material. The maximum size of the material is determined by the power and dimensions of the hot pressing equipment. Despite its softness, hot-pressed boron nitride can be machined into any custom shape as long as it's smaller than the raw material block we supply. Given the high price of raw material (BN solid) at over $20/inch3, simple shaped products such as crucibles may have their prices estimated based on the amount of BN solid used.

General Properties of boron nitride material

Compound Formula	BN
Purity	>99.5%(BN99), >99.9%(TPBN)
Molecular Weight	24.82
Melting Point	2973 °C
Bulk Density	2.0 g/cm3 (BN99), 1.6g/cm3(TPBN)
Crystalline	hexagonal
Mohs Hardness	2
Bending Strength	35 Mpa
Coefficient of Thermal Expansion R.T.	1.4 x 10-6/K
Coefficient of Thermal Expansion 1000~1600K
Thermal Conductivity R.T.	40 W/mk
Maximum Working Temperature	Oxidizing	900℃
	Vacuum	1900℃
	Inert	2100℃
Refractive Index	1.8 (h-BN); 2.5 (c-BN)
Electrical Resistivity	13 to 15 10x Ω-m

Our Boron Nitiride Products

QS Advanced Materials (QSAM) offers custom boron nitride crucibles and machined products with a $200 minimum order quantity, delivered within 2 weeks. QSAM is capable of producing BN blanks exceeding 12" x 12", whilst the maximum size of solid material available for purchase is 16" x16" x 8". Our regular BN crucible set comprises a crucible body and a staged boron nitride lid, with an optional lid featuring pressure balancing holes. Drawings can be provided for alternative forms. We also have a list of regularly made high purity crucibles with TPBN, and regular pure crucibles with BN99. 

Check the boron nitride specifications for ourpure BN99and zirconia composite materialZCBN

Please noitce BN cannot survive very high temperature in vacuum, as it decompose after 1900C. 

Please click  to upload your drawing and request a quote!

Maximum size for our boron nitride crucible

Due to the limit of hot pressed boron nitride raw material, please notice our boron nitride crucibles has limits on dimensions.

Crucible Height	<16"
Outer Diameter	<16"
CrucibleWall thickness	>2mm

For a quick estimation of price of your custom designed crucible and other simple boron nitride shapes, pleas use the equations below

Rectangular shape: Price = Unit price xmax.L.xmax.W.xmax.H. Cylinder shape: Price = Unit price x(max.OD.)2xmax.H. *Current reference unit price for BN99 grade pure boron nitride: $34.40/inch3($2.10/cc)

Different Boron Nitride Material Grades

* HBN and HBT are originally a product code for Momentive Performance Materials and represents for the calcium enhanced boron nitride material. QSAM is also providing calcium borate enhanced boron nitride with similar performance compared with HBN, and thermally purified HBT. Although calcium (or zirconium) enhanced HBN (or ZSBN) are the most common composite boron nitride material, we also produce a series of other composite boron nitride, such as AlN-BN, SiC-BN

Comparison of boron nitridecrucible made of hBN and PBN

Advantage of boron nitride crucibles

Boron Nitride Crucible Related Articles

   Boron Nitride Crucibles Used to Make TiO2 From Molten Salt 

     An introduction of T. Nakamura group's work of melting salt in boron nitride crucibles to obtain tianium dioxide.

   Large BN euiqpment boost production effieciency

     Report of a customer increased their productivity by utilizing large size boron nitride parts that only available in QSAM

   BN Crucibles: The Top Choice for Crystal Growth

      An introduction of research paper that investigates the properties of boron nitride crucibles is "Properties of Boron Nitride Crucibles for Growth of Single-Crystal Diamond," by A. Yoshikawa, Y. Kato, and K. Kobayashi, published in the Journal of Crystal Growth in 2003.

   BN Crucibles: Application in High-Temperature Corrosion Studies

     The article "High-Temperature Corrosion of SiC and Si3N4 in Molten Aluminum Using Boron Nitride Crucibles," by K. Matsuura, T. Kaneko, and H. Yanagisawa, published in Materials Transactions in 2005, highlights the benefits of using BN crucibles over other materials.

   Benefits of BN Crucibles for Molten Salt Electrolysis

     A review of research paper "Boron Nitride Crucibles for High Temperature Molten Salt Electrolysis" by Jia Li and Shuang Li, published in the Journal of Materials Science & Technology in 2021, highlights some of the advantages of using BN crucibles over other materials.

   Applications of hexagonal boron nitride (hBN)

     Introduction of applications of hexagonal BN, as structral components of reactors, nozzles, insulators and other applications such as release agent in metal drawing.

   hBN Crucible Enables High-Quality AlN Single Crystal Growth

     Introduction of a novel method for the growth of AlN single crystals using HPBN crucibles by sublimation. High-quality AlN single crystals were produced.

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