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Re: Liquid-Dielectric Capacitor

Tim Chandler <tchand-at-slip-dot-net> wrote: 
> Actually you are correct the liquid dielectric used was actually NH4 and H2O 
> with a related purity of 98.8%, which some call ammonium hydroxide
(NH4OH).  I 

Is that purity possible in NH4OH? I'd been under the impression that anything 
near that concentration would decompose into ammonia and water, and that
a large 
amount of that ammonia would exit promptly.  

> the solution specifications.  All the container had on it was a 6
digit number, 
>  NH4, and the words "purity 98.8%/DI".  Now that I think about it this
solution 
> might be something different than the substance I had originally thought it. 
> I will see what information I can dig up on the 6 digit number at work. 

Here's a good test; it should smell overwhelmingly of ammonia when you
open the 
container. I was a little surprised in your earlier description that you
didn't 
mention using such stuff outdoors or under a lab hood. It would seem dangerous 
to have such stuff open and indoors. (I've got a jug of 28% NH4OH that I'm 
terrified of opening -or dropping!!- indoors.)  

Another test is that it should leave essentially no residue when it
evaporates. 
Could the marking on the label possibly mean that it contains 98.8% deionized 
water? I've seen the terms DI or DI water used a lot for that in various  
manufacturing processes. 

Wes B.