Negative thermal expansion material of ZrW2O8 has been successfully synthesized by rapid solidification with a CO2 laser. The materials solidified in densely packed blocks with both smooth surface and dark green color. Raman spectroscopic and XRD analysis reveal that the samples solidified in an orthorhombic structure. It is analyzed that the compressive stress can be effectively reduced by lowering the laser scan speed. ZrW2O8 samples with cubic structure were produced when the laser scan speed was less than 2mm/s. The samples cooled by water are mainly dominated by a phase which demonstrates that a phase transition from y to a has occurred after annealing.
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