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High Thermopower with Metallic Conductivity in p/p}-Type Li-Substituted PbPdO2



Leo K. Lamontagne, Geneva Laurita, Michael W. Gaultois, Michael Knight, Leila Ghadbeigi, Taylor D. Sparks, Markus E. Gruner, Craig Brown, Ram Seshadri


Early age hydration kinetics of Portland cement with pozzolanic volcanic ash was examined using quasi-elastic neutron scattering. Volcanic ash consisting of two different particle sizes was used to prepare cement pastes by combinations of Portland cement and volcanic ash. Concentration of the volcanic ash played a major role in influencing the bound water index and self-diffusion coefficients of hydration by allowing more free and mobile water in the gel pores, suggesting that volcanic ash may not have completely been involved in the hydration process. This study shows that the particle size along with variation in volcanic ash composition governs the early age hydration process in volcanic ash cements.
Chemistry of Materials


water dynamics, neutron scattering, cement


Lamontagne, L. , Laurita, G. , Gaultois, M. , Knight, M. , Ghadbeigi, L. , Sparks, T. , Gruner, M. , Brown, C. and Seshadri, R. (2016), High Thermopower with Metallic Conductivity in p{/p}-Type Li-Substituted PbPdO<sub>2</sub>, Chemistry of Materials, [online], (Accessed June 20, 2024)


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Created May 8, 2016, Updated October 12, 2021