Prof. Wilkinson is an internationally recognized expert in the design and characterization of low and negative thermal expansion oxides and fluorides. He is perhaps best known for the discovery of negative thermal expansion over a very wide temperature range in ScF3 and the subsequent development of a family of fluorides based on the ReO3 structure type. Low thermal expansion materials provide for dimensional stability in the phase of temperature change and good thermal shock resistance, and negative thermal expansion materials can be used to compensate for the normal expansion of other components. His group extensive employs non-ambient (low T, high T and high pressure) X-ray and neutron diffraction, and total scattering, methods to understand structure property relationships in materials. He has recently extended his activities to include the synthesis and study of helium containing solids such as He2CaZrF6 and HeScF3. While these compositions are exotic, helium trapped in solids is directly relevant to the nuclear powder industry where irradiation leads to embedded helium atoms which can migrate, form bubbles and lead to component failure.
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Degrees
Prof. Wilkinson is an internationally recognized expert in the design and characterization of low and negative thermal expansion oxides and fluorides. He is perhaps best known for the discovery of negative thermal expansion over a very wide temperature range in ScF3 and the subsequent development of a family of fluorides based on the ReO3 structure type. Low thermal expansion materials provide for dimensional stability in the phase of temperature change and good thermal shock resistance, and negative thermal expansion materials can be used to compensate for the normal expansion of other components. His group extensive employs non-ambient (low T, high T and high pressure) X-ray and neutron diffraction, and total scattering, methods to understand structure property relationships in materials. He has recently extended his activities to include the synthesis and study of helium containing solids such as He2CaZrF6 and HeScF3. While these compositions are exotic, helium trapped in solids is directly relevant to the nuclear powder industry where irradiation leads to embedded helium atoms which can migrate, form bubbles and lead to component failure.
Degrees
Prof. Wilkinson is an internationally recognized expert in the design and characterization of low and negative thermal expansion oxides and fluorides. He is perhaps best known for the discovery of negative thermal expansion over a very wide temperature range in ScF3 and the subsequent development of a family of fluorides based on the ReO3 structure type. Low thermal expansion materials provide for dimensional stability in the phase of temperature change and good thermal shock resistance, and negative thermal expansion materials can be used to compensate for the normal expansion of other components. His group extensive employs non-ambient (low T, high T and high pressure) X-ray and neutron diffraction, and total scattering, methods to understand structure property relationships in materials. He has recently extended his activities to include the synthesis and study of helium containing solids such as He2CaZrF6 and HeScF3. While these compositions are exotic, helium trapped in solids is directly relevant to the nuclear powder industry where irradiation leads to embedded helium atoms which can migrate, form bubbles and lead to component failure.
