Valter Sergo

TL;DR: In this article, the reduction/oxidation behavior of high surface area CeO2 and Ce0.5Zr 0.5O2 mixed oxide is compared, and it is shown that the introduction of ZrO2 into the Ce2 framework with formation of a solid solution strongly modifies the reduction behaviour in comparison to that seen with CeO 2 alone, and that the expansion/contraction of the lattice parameter upon, respectively, reduction andoxidation, detected by X-ray diffraction, is responsible for the textural modification.

TL;DR: A critical survey of all experimental data about the low temperature degradation of zirconia due to the tetragonal-to-monoclinic transformation shows that the main factors affecting the aging phenomenon are the stabilizer type and content, the residual stress and the grain size.

TL;DR: In this paper, a broad range of vibrational spectroscopic applications with the focus on imaging and fiber-optical methods are discussed to study mineralized tissue (bone, teeth), skin, brain, the gastrointestinal tract (mouth, pharynx, esophagus, colon), breast, arteries, cartilage, cervix uteri, the urinary tract (prostate, bladder), lung, ocular tissue, liver, heart and spleen).

TL;DR: Although desirable from a mechanical point of view, it is shown that coating under residual compression are thermodynamically more stable and, hence, the dissolution of the ionic species, necessary in the exchange between bone and hydroxyapatite coating, can be impeded.

TL;DR: In this paper, single phase homogeneous CeO 2 -ZrO 2 solid solutions with various compositions were synthesized using a citrate complexation route, and the sintering behavior disclosed important modifications of the textural and structural properties, which apparently create a strongly defective structure that could explain the unusual redox properties of these catalytic systems.