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  1. Newsgroups: sci.electronics
  2. Path: sparky!uunet!uunet.ca!ohrd!usenet
  3. From: Gary  Truemner <truemner@rd.hydro.on.ca>
  4. Subject: HELP...find sealant/insulation for Ultrasonic crystal
  5. X-UserAgent: Nuntius v1.1.1d12
  6. Message-ID: <1993Jan6.140119.12029@rd.hydro.on.ca>
  7. X-XXMessage-ID: <A7704F621D03C8B9@pc-truemner.rd.hydro.on.ca>
  8. Sender: usenet@rd.hydro.on.ca (Usenet Administrator)
  9. Organization: ONTARIO HYDRO Research Lab
  10. Date: Wed, 6 Jan 93 14:01:19 GMT
  11. X-XXDate: Wed, 6 Jan 93 08:57:06 GMT
  12. Lines: 19
  13.  
  14. We would appreciate ANY info RE: a material and/or process to seal (from
  15. water
  16. absorption) and also electrically insulate a piezo-electric ceramic
  17. crystal,
  18. to be used for Ultrasonic flaw detection in hostile environment:
  19. -Lithiated heavy water (Ph-10) at 300@ C, 1500psi. (10MPa)
  20. -High radiation fields (>1 Mrads gamma + neutrons)
  21.  
  22. We have tried Cotronics Inc. ceramic adhesive & sealants but the curing
  23. process 
  24. does not lend itself well to this assembly. 
  25.  
  26. ---------      |         |
  27. |          |      ---------     Gary Truemner.ONTARIO HYDRO.Automated
  28. NDT&Welding
  29. |          |         |         |      R&D Lab.800 Kipling.m/s
  30. KR172.Toronto.(416) 207 6380          
  31. ---------                       _from a Never Ending Story believer.avoid
  32. the NOTHING
  33.