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- Path: sparky!uunet!olivea!sgigate!sgiblab!nec-gw!netkeeper!vivaldi!aslws01!aslss01!terry
- From: terry@asl.dl.nec.com
- Newsgroups: sci.physics
- Subject: Re: What is Yttria stabilised zirconia??
- Keywords: HTS, substrate, yttria stabilised zirconia
- Message-ID: <1993Jan22.192724.539@asl.dl.nec.com>
- Date: 22 Jan 93 19:27:24 GMT
- References: <1jp5jrINNl9c@matt.ksu.ksu.edu>
- Sender: news@asl.dl.nec.com
- Organization: (Speaking only for myself)
- Lines: 26
- Originator: terry@aslss01
- Nntp-Posting-Host: aslss01
-
- In article <1jp5jrINNl9c@matt.ksu.ksu.edu>
- ame@matt.ksu.ksu.edu (Abdulrahman M El-Koubysi) writes:
-
- > I was reading an article lately about High temperature superconductors. The
- > article mentioned that they use yttria stabilised zirconia substrates. What
- > is special about this substrate? what makes it different than previously
- > used substrates such as silver? Are there companies out there that
- > commercially produce these substrates or are they custom made??
-
- If I recall my book on natural and synthetic gemstones correctly, the
- "yttria stabilized zirconia" is more commonly known as "cubic zirconia" --
- the best (and cheapest) material for simulating diamonds. (I could be wrong
- about that too, so any flames from more informed folks are welcome.)
-
- The added yttria forces zirconium oxide to crystalize in the cubic system.
- The resulting material is insulating, refractory, reasonably hard, and
- (of course) has a cubic crystal structure.
-
- Such characteristics plus (perhaps) a good match of the crystal lattice
- unit of CZ with whatever they are putting on top of it might be what would
- make it a good high-temp substrate. The mismatch of crystal lattices is
- always a problem with such substrate approachs, since it leads to defects
- in the semiconductor that was laid down on top of it.
-
- Cheers,
- Terry Bollinger
-