Negative thermal expansion behaviour in the NZP phase NbTi(PO4)3

DA Woodcock, Philip Lightfoot, RI Smith

Research output: Other contribution

8 Citations (Scopus)

Abstract

We present new detailed structural data versus temperature on the Nasicon structured material NbTi(PO4)(3) obtained from powder neutron diffraction studies. This material shows a significant volume contraction over the range 20 degrees C < T < 700 degrees C. alpha(a) varies between -4.34 and -0.11 x 10(-6)degrees C-1 and alpha(c) between 0.08 and 3.07 x 10(-6)degrees C-1 over this range. This behaviour contrasts with the case of NaTi2(PO4)(3) (NaTP) which shows a positive volume expansion. The difference in this behaviour can be explained by the presence of filled MI sites in NaTP which are vacant in the case of NbTP.

Original languageEnglish
Number of pages191
Volume547
Publication statusPublished - 1999

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