Sapphire, or single-crystal aluminum oxide (Al₂O₃), is an ultra-hard, optically clear, and chemically inert material ideal for high-precision applications in optics, electronics, aerospace, and extreme environments. As one of the hardest engineering materials, sapphire combines outstanding mechanical performance with broad-spectrum transparency.
Sapphire is the single-crystal form of aluminum oxide (Al₂O₃), grown synthetically using methods such as the Kyropoulos or Czochralski process. It is second only to diamond in hardness, making it extremely resistant to wear and surface damage. It also offers optical transparency from UV to IR, making it ideal for windows, lenses, and sensors in high-stress applications.
We offer CNC machining for high-purity sintered Sapphire.
~22 GPa (Vickers Hardness)
3.98 g/cm³
~25 – 35 W/m·K
>10¹⁴ Ω·cm
Exceptional
Excellent
400 – 600 MPa
>2,000 MPa
Need a specific Sapphire composition? We offer custom material options tailored to your project requirements. Contact us to discuss your needs.
Trusted by over 200 successful companies around the globe.
Challenges & Solutions
Sapphire is extremely hard and brittle, requiring diamond tools, coolant control, and ultra-precision CNC techniques. We offer:
Tolerances Achievable for Machined Sapphire
Sapphire excels in applications where clarity, durability, and chemical resistance must coexist under extreme physical conditions.
Industries Served:
To meet strict industry standards, we offer advanced surface treatments for Sapphire parts:
Achieves ultra-smooth surfaces with submicron-level roughness (Ra < 0.1 μm).
Ensures high dimensional accuracy with minimal surface defects.
Enables permanent identification or branding without compromising material integrity.
Used for controlled material removal and surface texturing.
Used for controlled material removal and surface texturing.
We prioritize operational efficiency to reduce costs and expedite delivery.
Our collaboration with diverse partners, each with unique machinery and expertise, enables us to overcome complex manufacturing challenges.
Backed by 100+ carefully vetted, closely partnered experts, we fulfill your on-demand manufacturing needs at scale.
Every part we ship is meticulously inspected in our in-house lab to ensure it meets consistent design and quality standards.
Alumina (Al₂O₃) is a durable ceramic used for high-strength, high-temperature parts in precision industries.
High fracture toughness and wear resistance.
Excellent thermal conductivity and electrical insulation.
Used for optical and semiconductor applications.
Essential for semiconductor wafer processing.
Looking for more ceramic machining options? Check out our Alumina (Al₂O₃) CNC Machining services.
Looking for high-precision Sapphire machining? InstaVoxel delivers expert CNC machining, fast lead times, and superior quality. Contact us today to discuss your project.
