Hexagonal Boron Nitride (h-BN) vs Silicon Carbide (Sintered SSiC): 0% composition overlap. Significantly different materials serving different application areas.
Hexagonal Boron Nitride (h-BN) vs Silicon Carbide (Sintered SSiC)
Side-by-side chemical composition and mechanical property comparison.
Overview
Hexagonal Boron Nitride (h-BN)
Hot-pressed hexagonal boron nitride — "white graphite". Unique among ceramics: soft (Mohs 2), easily machinable with conventional tools, self-lubricating. Excellent thermal shock resistance, high-temperature stability (2800°C in inert atmosphere). Good thermal conductivity (30–60 W/m·K) combined with outstanding electrical insulation. Anisotropic properties. Not wetted by most molten metals. Applications: BN crucibles for metal melting, break rings for continuous casting, high-temp insulators, evaporation boats, plasma-resistant parts, solid lubricant.
Silicon Carbide (Sintered SSiC)
Pressureless sintered alpha-silicon carbide (SSiC). One of the hardest and lightest engineering ceramics (density 3.1 g/cm³). Exceptional thermal conductivity (120 W/m·K), very high compressive strength (3900 MPa), hardness 2800 HV, and outstanding chemical inertness. Maintains strength to 1650°C. Semiconductor (variable resistivity). Applications: mechanical seals, bearings, pump components, kiln furniture, semiconductor furnace parts, ballistic armor, brake discs.
| Hexagonal Boron Nitride (h-BN) | Silicon Carbide (Sintered SSiC) | |
|---|---|---|
| Material Number | — | — |
| Category | ceramic | ceramic |
| Standard | — | — |
Chemical composition (wt%)
| Element | Hexagonal Boron Nitride (h-BN) | Silicon Carbide (Sintered SSiC) | Overlap |
|---|---|---|---|
| C | — | ≤ 1.5% | — |
| BN | 95–99.9% | — | — |
| B2O3 | ≤ 2% | — | — |
| CaO | ≤ 2% | — | — |
Mechanical properties
| Property | Hexagonal Boron Nitride (h-BN) | Silicon Carbide (Sintered SSiC) | Unit |
|---|---|---|---|
| density | 1.9–2.1 | ≥ 3.1 | g/cm3 |
| flexural_strength | 33–61 | ≥ 550 | MPa |
| elastic_modulus | — | ≥ 410 | GPa |
Compatibility Assessment
Hexagonal Boron Nitride (h-BN) and Silicon Carbide (Sintered SSiC) have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Hexagonal Boron Nitride (h-BN) the same as Silicon Carbide (Sintered SSiC)?
Hexagonal Boron Nitride (h-BN) and Silicon Carbide (Sintered SSiC) have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace Hexagonal Boron Nitride (h-BN) with Silicon Carbide (Sintered SSiC)?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Hexagonal Boron Nitride (h-BN) and Silicon Carbide (Sintered SSiC)?
The main differences are in the following elements: overall alloying content. Hexagonal Boron Nitride (h-BN) is a ceramic grade, while Silicon Carbide (Sintered SSiC) is a ceramic grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.