Re: Standards etc
(no name) ( (no email) )
Tue, 12 Aug 1997 8:38:55 -0600 (MDT)
Ian,
>You may need to heat the material to ensure that crystallite size is
>as large as possible - we heat at 1200C for a few days - this makes a small,
>but observable, difference to the peak widths.
I suggest that you actually are removing microstrains in the material by heating;
not making the particles bigger. Did the stuff sinter at all at 1200C? We use CaF2
as a neutron diffractometer calibrant after heating; there it definitely removes
microstrains and leaves a little remaining peak broadening which is due to particle
size.
Bob Von Dreele