Sapphire Ingots

Sapphire Ingots

Product Overview

Sapphire crystal ingots are cylindrical base materials made from high-purity synthetic sapphire single crystals (α-Al₂O₃), widely used in LED substrates, optical windows, semiconductor wafers, laser devices, and consumer electronics. Renowned for their exceptional hardness (Mohs 9), high-temperature resistance (melting point 2040°C), superior light transmission (≥85% transmittance in 0.15μm–7.5μm wavelength range), and chemical stability, sapphire crystals are indispensable in advanced industrial applications. We have optimized the Kyropoulos method to produce ingots ranging from tens of kilograms to over 1000 kg, enabling large-scale, high-precision processing.

Key Advantages

  1. High Purity & Crystal Quality

    • Material purity ≥99.999%, with low dislocation density and uniform single-crystal structure for consistent downstream performance.

    • Diverse crystal orientations: Customizable C-plane (0001), A-plane (11-20), M-plane (10-10), and others to meet application-specific requirements.

  2. Large-Scale Manufacturing Capability

    • Diameter range: 2-inch (Φ50.8mm) to 8-inch (Φ203.2mm), with maximum diameter up to 750mm for 8-12 inch substrate production.

    • Ingot weight exceeds 1000 kg, achieving over 20% higher material utilization compared to traditional methods, reducing costs.

  3. Outstanding Optical & Physical Properties

    • Resists extreme temperatures (-50°C to 1900°C) and chemical corrosion, ideal for industrial lasers and high-temperature superconducting films.

    • High thermal conductivity (0.055 cal/°C·cm·sec at 23°C) for superior heat dissipation.

  4. Customization & Precision Processing

    • Supports non-standard dimensions, orientations, and surface treatments (e.g., fine grinding/polishing to Ra<5μm) for optical windows and sensors.

    • Compatible with X-ray orientation instruments (e.g., ALYX-600A) for ±15″ angular accuracy in bonding and measurement.

Technical Specifications

Parameter Details
Material Single-crystal sapphire (α-Al₂O₃), purity ≥99.999%
Crystal Orientation C-plane (0001), A-plane (11-20), M-plane (10-10), R-plane (1-102), etc.
Diameter Range 2-inch (Φ50.8mm) to 8-inch (Φ203.2mm), customizable
Length Starting from 20mm, extendable to 500mm (with auxiliary equipment)
Surface Finish Fine grinding/polishing (single/double-sided), surface roughness Ra<5μm
Thermal Properties Melting point 2040°C, thermal expansion coefficient 7.5×10⁻⁶/°C, thermal conductivity 0.055–0.060 cal/°C·cm·sec
Optical Properties Transmittance ≥85% (0.15μm–7.5μm), dielectric constant 9.4–11.58 (varies by orientation)
Packaging 100-class cleanroom packaging, stored in 1000-class ultra-clean environments

Applications

  • LED Industry: Substrates for Mini/Micro-LEDs, enhancing display brightness and energy efficiency.

  • Consumer Electronics: Smartphone camera covers, smartwatch screens, optical windows for AR/VR devices.

  • Semiconductors & Lasers: GaN epitaxial growth substrates, Ti:Al₂O₃ laser media.

  • Industrial & Research: High-temperature superconducting film substrates, high-power laser windows, aerospace components for extreme environments.

Customization Services

  1. Flexible Dimensions & Orientations: Non-standard cutting, edge chamfering, multi-orientation designs.

  2. Precision Testing & Orientation: X-ray orientation systems (e.g., ALYX-600A) ensure ±15″ angular accuracy for processing consistency.

  3. Fast Delivery: Bulk order production cycle 15–30 days, supported by full-chain resources (crystal growth—core drilling—slicing—polishing).

Quality Assurance

  • Standardized Production: Compliant with National Standard GB/T 31092-2014 (under revision), covering purity, dislocation density, and transmittance.

  • Full-process Inspection: 100% quality control via interferometers, spectrophotometers, and X-ray diffractometers.

  • Certifications: RoHS and REACH compliant, with a 12-month warranty.

Sapphire Crystal Ingots — Empowering Cutting-edge Technologies with Unmatched Performance
For customized solutions or technical inquiries, contact our engineering team to receive product manuals and test reports.

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