Bob, I work on high temp stuff all the time. Oil well logging tools must survive 300F or higher. It is pretty easy to build to 300F, 350F is a bit more challenging. Above that, vacuum flasks, or phase shift layers are usually required.
Some epoxies will go to 350 or 400 with respect to sealing and coating. Silicones can easily go to 400. Teflon is about the cheapest thing around for service to 500F. We makes lots of parts and pieces out of Teflon in our tools. Though not directly responsive to your question, here is a page on high temperature plastics that might come in handy on your new job: http://www.logwell.com/tech/dhdwe/plastics.html I put this together awhile back because of the lack of a good collection of data on high temp plastics for downhole use in a single location. Syd ----- Original Message ----- To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]> Sent: Sunday, January 26, 2003 6:43 AM > > I started a new job at http://www.gracesales.com/ the first of the year. > > We make equipment used by fire fighers, while *IN* the fire. > > Since I'm new to this field I was looking for others experience to learn from. > > I was wondering if any one had an tips on high temp. design? > > Especially in the area of cases and sealing them from water. > > The units must survive long enough to warn the fire fighters that they should > leave the building. It can self destruct after that. > > From what I understand you can have temps of 300'F, that can jump to 'flash points' of > 600'F in short periods of time (don't know the period). > > http://www.alternativescience.com/flame-proof.htm > > Has Plastic Coating good to 2,700'C. some thing that sounds interesting, > but can't find out if any one every made it. > > "Too hot to handle > > In April 1993, the defense magazine Jane's International Defense Review announced > the discovery by a British amateur inventor, Maurice Ward, of a thin plastic coating > able to withstand temperatures of 2,700 degrees Centigrade > > The reason why it was a defense magazine who first published news of This revolutionary > invention is that the coating is so resistant to heat that it can make tanks, ships and aircraft > impervious to the effects of nuclear weapons at quite close range -- and hence > is of great interest to the military mind." > > I've seen this stuff refereed to as "Starlight Paint", don't know if that is really correct. > > http://www.techpaint.com/ is a paint that generates heat that I found; going the wrong direction. ;-) > > -- > http://www.unusualresearch.com/ http://www.bpaddock.com/ > -- > Author: Bob Paddock > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Author: Syd Levine \(AnaLog\) INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
