Abstract: A method of manufacturing a thermoelectric material including: providing a half-Heusler compound of MgCuSn nanoparticles, obtaining a powder by mechanical alloying by using Mg chips, Si fine powder, Sn fine powder and Sb powder, the half-Heusler compound of MgCuSn nanoparticles and cyclohexane solution,wherein the weight percent V, of the cyclohexane solution is comprised between 0.5 wt % and 4.0 wt % and wherein the volume percent VHH of the Half-Heusler compound of MgCuSn nanoparticles satisfies: 1.4 vol %<VHH<2.0 vol %.

Abstract: The invention relates to a sintered product containing: in mass percent based on oxides, more than 99.5% of a material having a cubic crystallographic structure for more than 95% of the mass thereof, known as a material with a cubic structure, and having a refractive index of less than 2.75 in the wavelength range between 0.2 ?m and 5 ?m; and more than 50 ppma of dopants which must contain titanium oxide TiO2 and at least one additional dopant selected from ZrO2, CaO, and MgO, in which said at least one additional dopant is different from the oxide(s) forming the material with a cubic structure, but can be MgO when the material with a cubic structure is spinel MgAl2O4.

Abstract: A sintered yttrium oxide product comprises: • more than 99.5% of yttrium oxide, as a percentage by weight; and • more than 50 ppma and less than 1000 ppma of a dopant selected from Zr&Ogr;2 and/or HfO2; the mean grain size of the doped yttrium oxide product being more than 0.03 ?m and less than 5 ?m.

Abstract: The invention relates to a sintered product containing: in mass percent based on oxides, more than 99.5% of a material having a cubic crystallographic structure for more than 95% of the mass thereof, known as a material with a cubic structure, and having a refractive index of less than 2.75 in the wavelength range between 0.2 ?m and 5 ?m; and more than 50 ppma of dopants which must contain titanium oxide TiO2 and at least one additional dopant selected from ZrO2, CaO, and MgO, in which said at least one additional dopant is different from the oxide(s) forming the material with a cubic structure, but can be MgO when the material with a cubic structure is spinel MgAl2O4.

Abstract: A sintered alumina product includes, as a percentage by weight, more than 99.95% of alumina (Al2O3), the grain size of the alumina being in the range 0.2 ?m to 1.5 ?m, and has a density greater than 99.95% of the theoretical density of the alumina.

Abstract: The invention relates to a sintered alumina product with a density greater than 99.95% of the theoretical density and made for more than 99.95% of its mass from alpha alumina (Al2O3) and a dopant selected from Sm2O3, CaO and mixtures thereof, the amount of dopant being less than 1000 ppma and the mean particle size of the alumina grains being greater than 0.2 and less than 1.5 ?m. Of application to heat targeting windows or missile heads.