Product type: Ohara Optical Substrate. Application: Chemical, Ceramic, Glass. Model: Ultra-low expansion Microcrystalline Glass.
Overview
Innovative Short Wave Glass-Ceramic for Unique Product Creations: an appliance glass. Optical / electrical data: transmittance (0.6um~2.5um): >90%. Temperature 950℃. Listed for Chemical, Ceramic and Glass applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Type | Ohara Optical Substrate |
|---|---|
| Transmittance | (0.6um~2.5um): >90% |
| Application | Chemical, Ceramic, Glass |
| Model NO. | Ultra-low expansion Microcrystalline Glass |
| Thermal Expansion Coefficient | (-60~100℃): <8X10-8/℃ |
| Refractive Index | N=1.541/0.6328 Wavelength |
| Stress Birefringence | <4nm/Cm |
| Density | 2.53G/Cm3 |
| Flexural Strength | 173MPa |
| Long-Term Use Temperature | 950℃ |
| Microstructure | It is composed of fine grains (such as β-quartz solid solution, spodumene crystals) interwoven with residual glass, giving the material high strength and low thermal expansion. |
| Main specifications | φ600, φ550, φ520, φ480, φ450 |
| Supplier | Lumistar Special Glass Technology Co., Ltd. |
Technical data
| Main specifications: | φ600, φ550, φ520, φ480, φ450 |
|---|
What to specify when you request a quote
- Glass type and thickness — name the glass and thickness.
- Temperature and pressure — listed as “(-60~100℃): <8X10-8/℃”; give working temperature, thermal shock and any pressure rating.
- Strengthening and safety — listed as “173MPa”; state tempering, lamination or the safety standard.
- Outline and edges — send a drawing with outline, holes and edge finish.
Engineering guides for this part
For material grades and coating options, see Borosilicate Glass 3.3: Material & Coating Guide for Machined Parts. How parts like this are machined and finished is covered in Borosilicate Glass Sandblasting for Consistent Matte Surface Processing. For an application example, read Why Quartz Glass Components Excel in Coffee Heating Modules. Before sending a drawing, check Quartz Glass Manufacturing: Controlling Thermal Conductivity in Fused Silica. A related standard product is 4-inch Borofloat 33 Glass Wafers.
