HELP...find inorganic, sputtered sealant for sensor crystal

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2 total messages Started by Gary Truemner Fri, 08 Jan 1993 14:29

#404

Author: Gary Truemner
Date: Fri, 08 Jan 1993 14:29

20 lines
1506 bytes

We would appreciate ANY info RE: a material and/or process to seal (from water
absorption) and also electrically insulate a piezo-electric ceramic crystal,
to be used for Ultrasonic flaw detection in hostile environment:
-Lithiated heavy water (Ph-10) at 300 C, 1500psi. (10MPa)
-High radiation fields (>1 Mrads gamma + neutrons)

__repost NEW:
Material used must be inorganic since organics do not survive the radiation
fields.
	Ceramic adhesive & sealants do not lend themselves well to this assembly. We
are
thinking along the lines of using sputtering or some such process to acheive
the
adherence neccessary.   

------      |        |Truemner@ice3.kcps.rd.hydro.on.ca
|        |      |        |   GARY TRUEMNER (416)207 6380 FAX:(416)237 9285 
|        |      ------ONTARIO HYDRO.Automated NDT&Welding.R&D Lab     
|        |      |        |800 Kipling Ave.M/S KR172.Toronto.Ontario.M8Z 5S4
------      |        |   _a Never Ending Story believer.avoid the NOTHING

Re: HELP...find inorganic, sputtered sealant for sensor crystal

#432

Author: William E. Johns;S23015
Date: Mon, 11 Jan 1993 21:40

38 lines
2355 bytes

In article <1993Jan8.142920.24591@rd.hydro.on.ca> Gary  Truemner <truemner@rd.hydro.on.ca> writes:
>We would appreciate ANY info RE: a material and/or process to seal (from water
>absorption) and also electrically insulate a piezo-electric ceramic crystal,
>to be used for Ultrasonic flaw detection in hostile environment:
>-Lithiated heavy water (Ph-10) at 300 C, 1500psi. (10MPa)
>-High radiation fields (>1 Mrads gamma + neutrons)
>
>__repost NEW:
>Material used must be inorganic since organics do not survive the radiation
>fields.
>	Ceramic adhesive & sealants do not lend themselves well to this assembly. We
>are
>thinking along the lines of using sputtering or some such process to acheive
>the
>adherence neccessary.   

On the off-hand chance you haven't tried all possible sources, consider:

Cotronics Corp.
3379 Shore Parkway
Brooklyn, NY  11235
(718) 646-7996

These folks make ceramic and other systems for high temperature and otherwise
difficult environments.  They may have something you can use.  Then again, maybe
 not, won't cost that much to check out.

Ride Free,

Bill
___________________________________________________________________             
johnsw@wsuvm1.csc.wsu.edu  prez=BIMC  KotV KotRR                                
DoD #00314  AMA #580924   Squid Index 3.0    WMTC #0002  KotD #0001             
Yamabeemer fjgs1200pdr100 and a Volvo.  What more could anyone ask?             

We have secretly replaced the small, precision quartz timing crystals           
in these new IC's with improved Folger's crystals.  Now, let's watch 
what happens....

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