The above source shows that, in general, borosilicate glasses have
significantly lower dielectric losses than soda-lime glass. The lower
the alkali content in the borosilicate glass, the lower its dielectric
loss, and the higher its chemical resistance. Most laboratory glassware
is made from either alkali-free or low-alkali borosilicate glass.
Borosilicate lab glass is a fairly low-loss dielectric. It is about as
lossy as polypropylene at room temperature, and it has almost twice the
relative permittivity (~4 versus 2.2 for PP). However, glass dielectric
losses rise rapidly with temperature. This has lead to thermal runaway
and hot-spot dielectric punch-through failures in foil/soda-lime
glass/foil caps used in TC tank circuits.
Bert
homerlea--- via Tesla wrote:
Anyone know if borosilicate glass used in labs works better(less lossy) than the normal soda lime glass of regular bottles for making salt water capacitors?
Jim Heagy
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--
Bert Hickman
Stoneridge Engineering, LLC
http://www.capturedlightning.com
Alternative email: berthickman1@xxxxxxxxx
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