It is a very common mineral that is available in several forms. I believe that Vermiculite that is used by gardeners and sometimes for thermal insulation by builders is one form. I THINK it is the material that used to be used for windows in wood stoves and sometimes lab furnaces. Called Isinglass(?) It is used as a component in paint because of its reflective qualities. It is fragile in thin sheets, but otherwise nearly indestructible. John Ferrell 6241 Phillippi Rd Julian NC 27283 Phone: (336)685-9606 Dixie Competition Products NSRCA 479 AMA 4190 W8CCW "My Competition is Not My Enemy" ----- Original Message ----- From: "Spehro Pefhany" To: Sent: Wednesday, August 29, 2001 11:41 AM Subject: Re: [OT]: How to heatsink a lot of power electronics? > At 10:26 AM 8/29/01 -0500, you wrote: > >Roman - I distinctly remember what I believe to > >be Mica insulators (best described appearance-wise > >as simply 'clear and glistening' ) used in such common > >household products as toaters ... Have you seen that > >as well? > > There's a kind of mica that is (was?) used in lamp shades > and I think it meets that description. The stuff used in > toasters these days is brown and flakes, IIRC. > > It's used in large quantities in heaters (mica band > heaters) and it is probably still used in China and > Russia in their electron tube production lines . > > Best regards, > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = > Spehro Pefhany --"it's the network..." "The Journey is the reward" > speff@interlog.com Info for manufacturers: http://www.trexon.com > Embedded software/hardware/analog Info for designers: http://www.speff.com > Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu