×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

750C Hermetic, Optical Window Design

750C Hermetic, Optical Window Design

750C Hermetic, Optical Window Design

(OP)
Good-day,

  In my research, I will be photographing droplets resting on horizontal surfaces inside a steel well in a furnace running at 750C, though I may later wish to raise the temperature by a few hundred degrees celsius.

  To permit imaging, I require an approximately 10-13 cm diameter by 2-5 mm thick window in the side of the well (open-topped, stainless steel, cylinder, 15 cm diameter, 6.5 cm thick walls) that can withstand these temperatures, while remaining hermetically sealed (during later experiments, we will be sealing the top of the well and running a chlorine atmosphere).

  As the well is a cylinder, the simple flat, bolt-on type windows I have seen in appropriate sizes do not seem as though they could be modified to work, and most do not meet my temperature requirements.

  I was thinking if it would be possible to buy a window (i.e., quartz) hermetically sealed to a ring of metal which I could then weld or screw onto a (threaded) fixture previously welded to the well wall (i.e., a cylindrical tube open at both ends, with one end welded to the well and the other to be attached to the window assembly).  If the threaded design were pursued, I would also require an appropriate sealant.

I am interested as to possible window designs or any suggestions or information (i.e., relevant companies, etc.) that would be suitable, as well as being low cost (i.e, < CAN$500 (~US$380), excluding labour).  

Thank you for your time.

Auf wiedersehen,

James

RE: 750C Hermetic, Optical Window Design

You might look into using the same seal configuration as used on the vacuum seal that you're planning on using.  Most adhesives will not tolerate that high a temperature.


Additionally, the thermal expansion alone can pose problems.  An O-ring seal would allow some degree of expansion and movement under temperature.

TTFN

RE: 750C Hermetic, Optical Window Design

Alternative: mount the quarz windov between two flanges
and blow out the small leakage.

<nbucska@pcperipherals DOT com> subj: eng-tips

RE: 750C Hermetic, Optical Window Design

or use a Venturi-pump with water and simply wash the small
amount of leaking Cl2 into the drain...

<nbucska@pcperipherals DOT com> subj: eng-tips

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources