Pyrochlore La2Zr2O7 containing 8 mol% Y2O3 crystallizes at 825•K to 885•Ž from an amorphous material prepared by the hydrazine method. The lattice parameter is ƒ¿=1.0751 nm; this value is smaller than that (ƒ¿=1.0793 nm) of pure La2Zr2O7. Dense Y2O3-doped La2Zr2O7 ceramics (99.7% of theoretical) with an average grain size of 3.8 pm have been fabricated by hot isostatic pressing for 2 h at 1500•Ž and 196 MPa.
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