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Cearceram-Z Glass

POC-OC-122488-Ohara Cearceram-Z Glass

  • Near-zero thermal expansion ensures exceptional dimensional stability for high-precision applications.
  • High thermal resistance and mechanical durability suitable for extreme environments.
  • Outstanding optical clarity and homogeneity across a broad range of applications.
  • Processed and customized by POC for various optical, industrial, and metrological uses.
  • Excellent performance in precision instruments, optics, and demanding scientific applications.

Customizable Components Available for This Material to Meet Your Specific Needs!

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Ohara Cearceram-Z Glass  Material General Description

Ohara Cearceram-Z Glass is a premium glass-ceramic material renowned for its exceptional thermal and mechanical properties. While this material is manufactured by Ohara, Photonics On Crystals (POC) specializes in processing Cearceram Glass into custom components tailored for a wide range of industries.

This glass-ceramic material is distinguished by its near-zero coefficient of thermal expansion, ensuring unparalleled dimensional stability even under significant temperature variations. Cearceram-Z is highly resistant to thermal and mechanical stresses, making it ideal for applications requiring long-term precision and durability. It is widely used in optical systems, high-performance metrology instruments, and other advanced scientific and industrial applications.

The material’s exceptional homogeneity and stability make it indispensable for high-performance optics, from astronomical telescopes to cutting-edge photonics devices. Its versatility is complemented by POC’s expertise in shaping, coating, and customizing Cearceram-Z Glass for specialized requirements.

General Applications and Examples

  1. Astronomy and Optics:
    Ohara Cearceram Glass is widely used in telescope mirrors and optical substrates for astronomical applications. Its thermal stability ensures precise optical performance even under fluctuating temperatures.
  2. Semiconductor and Lithography:
    Cearceram-Z Glass serves as a critical substrate material in lithography tools and semiconductor manufacturing, where thermal expansion must be minimized to achieve nanometer-level precision.
  3. Metrology and Measurement:
    Due to its dimensional stability, Cearceram-Z Glass is ideal for high-precision measurement tools, including interferometers, coordinate measuring machines, and optical comparators.

Chemical and Structural Properties

Property

Value

Material Type

Glass-ceramic

Density

~2.5 g/cm³

Thermal Expansion Coefficient

~0.02 × 10^-6/K

Young’s Modulus

90 GPa

Poisson’s Ratio

0.24

Hardness (Knoop)

~650

Refractive Index (at 550 nm)

~1.54

Transparency Range

0.3–2.5 µm

Chemical Durability

Resistant to acids and alkalis

Optical, Laser and Nonlinear Optical Properties

Property

Value

Thermal Stability

Ultra-stable for precision optics

Surface Quality

10-5 (scratch-dig)

Surface Flatness

λ/10 @ 632.8 nm

Optical Homogeneity

Excellent across large dimensions

Absorption Coefficient

Low, minimizing energy loss

Standard Fabrication Specifications

Specification

Value

Dimensional Tolerance

±0.02 mm

Surface Flatness

λ/10 @ 632.8 nm

Parallelism

<5 arcseconds

Scratch-Dig Quality

10-5

Maximum Size

Up to 800 mm (customizable)

Beveling

<0.2 × 45°

Spectrum Transmission Curve:

Transmission characteristics of Cearceram-Z Glass exhibit high transparency within the 0.3–2.5 µm range. This allows for superior performance in visible and near-infrared applications. Spectrum transmission data can be provided upon request.

Coating Specification:

 

  • Anti-Reflective Coatings: Customizable coatings to enhance transmission for specific wavelength ranges.
  • Metallic Coatings: For high reflectivity, especially in laser systems.
  • Protective Coatings: Durable coatings for enhanced longevity in demanding environments.
  • Adhesion Test Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.

POC Strength and Capabilities

 

Photonics On Crystals (POC) provides advanced customization and fabrication of Ohara Cearceram-Z Glass, transforming this high-performance material into precision components tailored for diverse applications. With a commitment to quality and precision, POC ensures that every product meets the specific needs of industries ranging from optics to semiconductor manufacturing.

Standard Products

Product

Dimensions (mm)

Surface Flatness

Price (USD)

Cearceram-Z Optical Substrate

100 × 100 × 20

λ/10

$2,500–$4,500

Cearceram-Z Prism

50 × 50 × 10

λ/8

$1,500–$3,000

Cearceram-Z Optical Window

200 × 200 × 30

λ/6

$3,500–$6,500

Customization Options

Available upon request

Tailored Specifications

Contact for quote

POC-OC-122488-Ohara Cearceram-Z Glass

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