Particle size dependent x-ray linewidth of rhombohedral phase in Pb(Zn[sub 1/3]Nb[sub 2/3])O[sub 3]–(6,7)%PbTiO[sub 3]

Rajan, K.K.; Lim, L.C.
December 2003
Applied Physics Letters;12/22/2003, Vol. 83 Issue 25, p5277
Academic Journal
The full-width-at-half maximum (FWHM) of rhombohedral (002)[sub R] x-ray diffraction peak as a function of particle size in Pb(Zn[sub 1/3]Nb[sub 2/3])O[sub 3]–(6,7)%PbTiO[sub 3] [PZN–(6,7)%PT] solid solutions has been investigated. The sharpest (002)[sub R] peak, which has a FWHM of 0.10°–0.12°, was obtained from powder samples of intermediate particle sizes of about 120 μm. The broad (002)[sub R] peak typically observed in PZN–PT single crystal plates and coarse powder samples is the result of trapped metastable phases and, to a lesser extent, the transformation stresses/strains in the material. The increased FWHM at particle sizes <60 μm, on the other hand, can be attributed to crystal defects and, possibly, freshly formed metastable phases induced by the sample pulverization process. © 2003 American Institute of Physics.


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