Abstract
Energy-dependent small-angle X-ray scattering (SAXS) measurements near the Zr–K absorption edge of a nano-scale alumina–zirconia–silicate ceramic are reported. The in situ experiments cover the temperature range from 250 to 725°C, during which the sol-gel prepared nano-particles consolidate and the glass matrix phase begins to soften, leading to a compaction of the ceramic. The dominant scattering mechanism changes from a surface-fractal type to a mass-fractal type linked to direct contact areas between nano-particles and matrix. The energy-dependent data identify the zirconium-bearing phase as dominant in the high-q range. The experimental data are placed in the context of recent advances in in situ anomalous small-angle X-ray scattering (ASAXS) and some experimental problems and solutions of near-edge scattering are discussed. Contents 1. Introduction 4 2. Anomalous small-angle scattering 4 3. Experimental 6 4. Results 7 5. Discussion 8 6. Conclusions and outlook 10 Acknowledgments 10 References 11 Subject Index 12
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