Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!rutgers!ames!oliveb!sun!pepper!cmcmanis
From: cmcmanis%pepper@Sun.COM (Chuck McManis)
Newsgroups: sci.electronics
Subject: Re: Superconducting Energy Storage
Message-ID: <19635@sun.uucp>
Date: Mon, 25-May-87 18:29:23 EDT
Article-I.D.: sun.19635
Posted: Mon May 25 18:29:23 1987
Date-Received: Tue, 26-May-87 03:49:39 EDT
References: <226@ndmath.UUCP> <7766@orchid.UUCP>
Sender: news@sun.uucp
Reply-To: cmcmanis@sun.UUCP (Chuck McManis)
Organization: Sun Microsystems, Mountain View
Lines: 15
Keywords: Super Conducting, perfect batteries
Summary: Not much current in these puppies

One of the things that was not stated in all the hoopla about high
temperature superconducters was that the current density of the 
devices is relatively small. The number I hear was something on the
order of 10 to 15 mA. Which is not all that usefull in generating
huge magnetic fields.  The current is limited by a lack of free 
electrons in the ceramic material. Any attempt to increace the
current causes some of the 'non-free' electrons to get involved and
the material heats up and stops super conducting. The paper in 
Sunnyvale had an article on one person seeing super conducting 
effects at dry ice temperatures although they couldn't isolate the
the material and reproduce it. 

--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.