Aluminium Oxide (Alumina) 99.5% vs Aluminium Nitride: 0% composition overlap. Significantly different materials serving different application areas.
Aluminium Oxide (Alumina) 99.5% vs Aluminium Nitride
Side-by-side chemical composition and mechanical property comparison.
Overview
Aluminium Oxide (Alumina) 99.5%
The most widely used engineering ceramic. Alpha-phase alumina (99.5% Al2O3) offers exceptional hardness (1440 HV), excellent dielectric properties, high compressive strength (2600 MPa), good thermal conductivity (35 W/m·K), and outstanding chemical resistance. Usable to 1750°C. Applications include wear pads, seal rings, substrates, thread guides, grinding media, furnace tubes, ballistic armor, and high-voltage insulators. Available in purities from 94% to 99.8%.
Aluminium Nitride
Non-oxide ceramic with the highest thermal conductivity among electrical insulators (170–230 W/m·K). Excellent dielectric properties, CTE closely matching silicon wafers (4.5×10⁻⁶/K). Density 3.3 g/cm³, flexural strength 300–400 MPa, hardness 11 GPa. Alternative to toxic BeO in semiconductor packaging. Applications: power electronic substrates (IGBT, MOSFET), LED heat sinks, laser diode mounts, microwave components, electrostatic chucks.
| Aluminium Oxide (Alumina) 99.5% | Aluminium Nitride | |
|---|---|---|
| Material Number | — | — |
| Category | ceramic | ceramic |
| Standard | — | — |
Chemical composition (wt%) — Pro
| Element | Aluminium Oxide (Alumina) 99.5% | Aluminium Nitride | Overlap |
|---|---|---|---|
| Al2O3 | ≥ 99.5% | ≤ 1% | No overlap |
| SiO2 | ≤ 0.2% | — | — |
| MgO | ≤ 0.1% | — | — |
| Na2O | ≤ 0.1% | — | — |
| AlN | |||
| Y2O3 |
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Sign up free — 3 comparisons/day freeMechanical properties — Pro
| Property | Aluminium Oxide (Alumina) 99.5% | Aluminium Nitride | Unit |
|---|---|---|---|
| Density | ≥ 3.89 | ≥ 3.3 | g/cm3 |
| Flexural Strength | ≥ 379 | ≥ 400 | MPa |
| Compressive Strength | ≥ 2600 | ≥ 2100 | MPa |
| Elastic Modulus | |||
| hardness_vickers | |||
| fracture_toughness_kic | |||
| poissons_ratio | |||
| Thermal Conductivity | |||
| thermal_expansion | |||
| specific_heat | |||
| max_use_temperature | |||
| dielectric_strength | |||
| volume_resistivity |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
Aluminium Oxide (Alumina) 99.5% and Aluminium Nitride 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 Aluminium Oxide (Alumina) 99.5% the same as Aluminium Nitride?
Aluminium Oxide (Alumina) 99.5% and Aluminium Nitride have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace Aluminium Oxide (Alumina) 99.5% with Aluminium Nitride?
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 Aluminium Oxide (Alumina) 99.5% and Aluminium Nitride?
The main differences are in the following elements: Al2O3. Aluminium Oxide (Alumina) 99.5% is a ceramic grade, while Aluminium Nitride 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.