Hardness 9.0 CF Flanged Sapphire Glass Viewports For Vacuum Equipment

Hardness 9.0 CF Flanged Sapphire Glass Viewports For Vacuum Equipment

  • High Light

    Sapphire Glass Viewports


    9.0 CF Hardness Sapphire Cover Glass


    Flanged Sapphire Glass Window

  • Material
    Sapphire Crystal
  • Orientation
  • Item Name
    Sapphire Windows
  • Surface
  • Moq
  • Tolerance
  • S/D
  • Advantage
    Resistant High Pressure And Resistant Corrosion
  • Hardness
  • Place of Origin
  • Brand Name
  • Certification
  • Model Number
    sapphire viewport
  • Minimum Order Quantity
  • Price
    usd30/pcs or by quantites
  • Packaging Details
    customzied carton box
  • Delivery Time
  • Payment Terms
    T/T, Western Union, L/C
  • Supply Ability

Hardness 9.0 CF Flanged Sapphire Glass Viewports For Vacuum Equipment

Hardness 9.0 CF Flanged Sapphire glass Viewports  sapphire glass windows for vacuum equipment  High temperature resistance High pressure resistance Wear resistance Corrosion resistance Hardness
Sapphire  Description

Sapphire glass is an application of synthetic sapphire generally produced by subjecting aluminum oxide powder under extreme heat and pressure. Further heat treatment removes internal stresses before processing into thin sheets. The resulting output is a transparent material that is more durable than standard glass. Take note that a synthetic sapphire has the same physical properties as naturally-occurring sapphire.


Although sapphires are blue in color, a sapphire glass is highly transparent to wavelengths of light between 150 nanometers and 5500 nanometers. This range gives the material a very wide optical transmission band from ultraviolet to near-infrared.

It is worth mentioning that the human eye can only discern wavelengths between 380 nanometers and 750 nanometers. In other words, a sapphire glass passes the most basic requirement of an ideal screen: light should pass through it, and an individual should clearly see through it.

But the real advantage of sapphire glass lies in its extraordinary hardness. The material is nearly twice as hard as standard glass, and it is almost as hard as a diamond. For a quick reference, the sapphire has a value of 9, while a diamond has a value of 10 under the Mohs scale of mineral hardness. This means that sapphire glass is almost resistant to scratch unless it will come in direct and hard abrasive contact with a diamond.



 Glass sapphire windows allow the window to be mounted as close to the chamber as reasonably possible and allow the clearest access from the window surface on the air side. These windows are silver-brazed to Kovar® sleeves. They are mounted in stainless steel tube-weld adapters and CF type flanges for use below 1x10-11, or ISO type Kwik-Flange®. Optional flange weldments are available as special order.

Sapphire Window surfaces which are extremely hard and scratch resistant offer a minimum of distortion and provide maximum light transmission suitable for most applications. UV grade viewports have a 90° crystal orientation normal to the optical axis.


  • Offers greater distortion-free view area
  • ¾” and 1” are UV grade.
  • Magnetic Kovar® content only 1% to 3%
  • >80% Transmission from 250nm (UV Grade) to 4000nm
  • CF and Weld mount bakeable to 450°C, 25°C/Min gradient
  • Kwik-Flange® bakeable to 200°C

We can offer "Sapphire Viewports" available in series of standard sizes from 3/4 inch through 2 inch with a variety of flange options. Dimensions are in inches unless otherwise noted.

Hardness 9.0 CF Flanged Sapphire Glass Viewports For Vacuum Equipment 0

CAUTION: Although sapphire has a reasonable thermal conductivity, for safety, we strongly recommend that no viewport is exposed to a temperature ramp of greater than 2-3°C per minute, and that no viewport be exposed to direct thermal radiation. To limit thermal gradients when heating viewports, we recommend the viewing area and the flange be covered with many layers of aluminum foil to act as a reflective shield.

Hardness 9.0 CF Flanged Sapphire Glass Viewports For Vacuum Equipment 1

ZMSH is the premier  sapphire lens manufacturer in China. Our optical lens components are manufactured by JINGJING Tech to the exact specifications needed for your application. Sapphire is an extremely durable and scratch resistant substrate which creates a rugged optical lens that can stand up to very harsh environments. Sapphire lenses will add to the long lasting value of your project or product. Perhaps you are constantly replacing your product’s glass lenses due to damage. Consider replacing them with sapphire from us.


Material  Sapphire
Diameter 0.5 to 350mm
Diameter Tolerance ±0.05 mm (Standard), up to +0.000/-0.002 mm
Thickness tolerance ±0.05 mm (Standard), up to +/-0.0.1mm
Surface Quality 60-40 S/D (Standard), up to 10-5S/D
Surface Figure λ/4 or λ/10
Centration 1 Minute or 30 Second
Coating uncoated, AR and HR
Hardness 9.0 CF Flanged Sapphire Glass Viewports For Vacuum Equipment 2Hardness 9.0 CF Flanged Sapphire Glass Viewports For Vacuum Equipment 3
We look forward to working together.

1. Q: Can I get sample and how long will it take?
A:Yes. We can supply sample. And you need to pay for the sample and courier. About 7days after receiving the payment, we will send it out.
2. Q: What's the MOQ?
A: Our MOQ is 3pieace.
3. Q: Can I have my own customized product?
A: Yes. Your customized requirements for logo, design, package, carton mark, your language manual etc. are very welcome.
4. Q: Can I mix different models in one container?
A: Yes. Different models can be mixed in one container.
5. Q: What is the payment terms?
A:100% T/T
If you have another question, pls feel free to contact us as below: