Beryllium Oxide Question

psychokids · 11th November 2002, 05:16 AM

Hello,

I rescently bought what i thought were beryllium oxide pads off of ebay, but when they arrived, they are flexible and seem to be plastic-like. Was the seller mistaken? I thought that beryllium was a brittle ceramic-like substance. I have arranged to return the item but want to check before giving them back.

Thanks!
-Chris

halojoy · 11th November 2002, 05:20 AM

Isn't Beryllium so toxic
that it is undesirable to use it any more?
I know it is the material with lowest termal resistence.
It is a question about to preserve our beloved environment.

Be can give you cronical poisioning with
astmatical troubles, in your lungs
And it is cancer producing

In Sweden products with beryllium is forbidden to sell.

I think you should praise the lord for not sending you Beryllium

I would rather have some Watt less
than a lifelong suffering with breathing

Peter Daniel · 11th November 2002, 05:26 AM

Quote:

Originally posted by psychokids
Hello,

I rescently bought what i thought were beryllium oxide pads off of ebay, but when they arrived, they are flexible and seem to be plastic-like. Was the seller mistaken? I thought that beryllium was a brittle ceramic-like substance. I have arranged to return the item but want to check before giving them back.

Thanks!
-Chris

I'm using mostly berillium oxide pads. When handled properly thay are no danger to me

and you are right, they should be a brittle ceramic-like, white substance. I once tried to trim one on a belt sander, but I didn't succed.

There are also aluminum oxide pads and they look very close to beryllium ones.

alvaius · 11th November 2002, 05:29 AM

You can buy BeO impregnated silicon pads which will be flexible, but not plastic like. Are you talking an orangy sort of plastic? Sounds more Kapton like.

psychokids · 11th November 2002, 05:32 AM

Its not really toxic unless you inhale it in powder form. As for the environment, I bought it from a surplus dealer, so it would either end up in my amps, or thrown into a landfill...

-Chris

Peter Daniel · 11th November 2002, 05:35 AM

There are other, much bigger dangers to our beloved environment, than beryllium oxide pads.

psychokids · 11th November 2002, 05:38 AM

Thank you all, I have my answer. I'm guessing that i have a bunch of nylon or other off-white plastic disks which sadly i have no use for. Oh well, at least i get my 20 bucks back, and i still have my big mica sheets...

Thanks!
-Chris

alvaius · 11th November 2002, 05:43 AM

BeO impregnated silicone is whitish, fairly soft, and quite flexible.

I will try to find a web-link for you.

halojoy · 11th November 2002, 05:44 AM

We can always say that something else is worse (for environment)
But the one being faithful in small matters
will probably be true in the bigger matters

djk · 11th November 2002, 10:06 AM

High performance insulators like the Bergquist K-10 are designed to replace ceramic insulators. They have a Kapton film dielectric barrier to protect against cut-through, combined with a Boron Nitride filled silicon rubber. They can cost more than the transistor they mount.

The problem is that they look the same as the $0.50 non filled ones. The $0.03 Mica washers and grease have a lower thermal resistance than the cheap rubber ones.

Unless the seller can provide proof of what they are I would return them.

11th November 2002, 05:16 AM	#1
psychokids diyAudio Member Join Date: Nov 2002 Location: Kent, WA	Beryllium Oxide Question Hello, I rescently bought what i thought were beryllium oxide pads off of ebay, but when they arrived, they are flexible and seem to be plastic-like. Was the seller mistaken? I thought that beryllium was a brittle ceramic-like substance. I have arranged to return the item but want to check before giving them back. Thanks! -Chris

11th November 2002, 05:20 AM	#2
halojoy On Hiatus Join Date: Nov 2002	Beryllium Isn't Beryllium so toxic that it is undesirable to use it any more? I know it is the material with lowest termal resistence. It is a question about to preserve our beloved environment. Be can give you cronical poisioning with astmatical troubles, in your lungs And it is cancer producing In Sweden products with beryllium is forbidden to sell. I think you should praise the lord for not sending you Beryllium I would rather have some Watt less than a lifelong suffering with breathing

11th November 2002, 05:35 AM	#6
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	As for the environment There are other, much bigger dangers to our beloved environment, than beryllium oxide pads. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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11th November 2002, 05:29 AM	#4
alvaius diyAudio Member Join Date: Feb 2002 Location: Toronto	You can buy BeO impregnated silicon pads which will be flexible, but not plastic like. Are you talking an orangy sort of plastic? Sounds more Kapton like.

11th November 2002, 05:32 AM	#5
psychokids diyAudio Member Join Date: Nov 2002 Location: Kent, WA	Its not really toxic unless you inhale it in powder form. As for the environment, I bought it from a surplus dealer, so it would either end up in my amps, or thrown into a landfill... -Chris

11th November 2002, 05:38 AM	#7
psychokids diyAudio Member Join Date: Nov 2002 Location: Kent, WA	Thank you all, I have my answer. I'm guessing that i have a bunch of nylon or other off-white plastic disks which sadly i have no use for. Oh well, at least i get my 20 bucks back, and i still have my big mica sheets... Thanks! -Chris

11th November 2002, 05:43 AM	#8
alvaius diyAudio Member Join Date: Feb 2002 Location: Toronto	BeO impregnated silicone is whitish, fairly soft, and quite flexible. I will try to find a web-link for you.

11th November 2002, 05:44 AM	#9
halojoy On Hiatus Join Date: Nov 2002	We can always say that something else is worse (for environment) But the one being faithful in small matters will probably be true in the bigger matters

11th November 2002, 10:06 AM	#10
djk diyAudio Member Join Date: Feb 2001 Location: USA	High performance insulators like the Bergquist K-10 are designed to replace ceramic insulators. They have a Kapton film dielectric barrier to protect against cut-through, combined with a Boron Nitride filled silicon rubber. They can cost more than the transistor they mount. The problem is that they look the same as the $0.50 non filled ones. The $0.03 Mica washers and grease have a lower thermal resistance than the cheap rubber ones. Unless the seller can provide proof of what they are I would return them.

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