Abstract:
An alumina particle composite (1) includes an alumina particle (2) and an organic acid (3) chemically bonded to a surface of the alumina particle (2). Further, the alumina particle (2) has a short axis length of 1 to 10 nm, a long axis length of 20 to 400 nm, and an aspect ratio of 5 to 80, and is represented by Formula I, Al2O3·nH2O Formula I where n is 0 or more.
Abstract translation:氧化铝颗粒复合材料(1)包括氧化铝颗粒(2)和与氧化铝颗粒(2)的表面化学键合的有机酸(3)。 此外,氧化铝颗粒(2)的短轴长度为1〜10nm,长轴长度为20〜400nm,纵横比为5〜80,由式I表示,Al 2 O 3·nH 2 O式I 其中n为0以上。
Abstract:
A phase change magnetic ink and process for preparing same including comprising a phase change ink carrier; an optional colorant; an optional dispersant; an optional synergist; an optional antioxidant; and a polymer coated magnetic nanoparticle comprising a magnetic core and a polymeric shell disposed thereover.
Abstract:
A method for converting UO3 and/or U3O8 into hydrated UO4 of formula UO4.nH2O wherein n is 2 or 4, comprising the following successive steps: a) preparing an aqueous suspension of a UO3 powder and/or a U3O8 powder; b) adding hydrogen peroxide H2O2 to the aqueous suspension of a UO3 and/or U3O8 powder, converting the UO3 and/or U3O8 into hydrated UO4 and precipitating, crystallizing the hydrated UO4 in the suspension; g) recovering the precipitate, crystals of UO4 hydrate; h) optionally, washing the recovered UO4 hydrate precipitate, crystal(s); i) optionally, repeating step d); j) optionally, drying the precipitate, the crystals; wherein the addition of H2O2 to the aqueous suspension is carried out so that the suspension contains a stoichiometric excess of H2O2 relatively to the stoichiometry of the reaction from UO3: UO3+nH2O+H2O2→UO4.nH2O+H2O (1) or of the reaction from U3O8 UO2.67+1.33H2O2+nH2O→UO4.nH2O+H2O (2) and the pH of the suspension is maintained in steps a) and b) at a value comprised between 2 and 3.
Abstract translation:将UO 3和/或U 3 O 8转化为式UO·4H 2 O的水合UO 4的方法,其中n为2或4,包括以下连续步骤:a)制备UO 3粉末和/或U 3 O 8粉末的水性悬浮液; b)向UO 3和/或U 3 O 8粉末的水性悬浮液中加入过氧化氢H 2 O 2,将UO 3和/或U 3 O 8转化为水合UO 4并沉淀,使悬浮液中的水合UO4结晶; g)回收沉淀物,UO4水合物晶体; h)任选地,洗涤回收的UO4水合物沉淀物,晶体; i)任选地,重复步骤d); j)任选地,干燥沉淀物,晶体; 其中向含水悬浮液中加入H 2 O 2使得悬浮液相对于来自UO 3 :OO 3 + n H 2 O + H 2 O 2→UO 4·n H 2 O + H 2 O(1)的反应的化学计量比,含有化学计量过量的H 2 O 2 来自U3O8 UO2.67 + 1.33H2O2 + nH2O-> UO4·nH2O + H2O(2)的反应,并且悬浮液的pH在步骤a)和b)中保持在2和3之间的值。
Abstract:
A process for preparing a mesoporous alumina is described, comprising the following steps: a) mixing, in aqueous solution, at least one source of aluminum constituted by an aluminum alkoxide, at least one cationic surfactant and at least one organic solvent selected from methanol and ethanol; b) hydrothermally treating the mixture formed in said step a); c) drying the solid formed in said step b); d) calcining the solid formed in said step c).
Abstract:
Composites having semiconductor structures embedded in a matrix are described. In an example, a composite includes a matrix material. A plurality of semiconductor structures is embedded in the matrix material. Each semiconductor structure includes an anisotropic nanocrystalline core composed of a first semiconductor material and having an aspect ratio between, but not including, 1.0 and 2.0. Each semiconductor structure also includes a nanocrystalline shell composed of a second, different, semiconductor material at least partially surrounding the anisotropic nanocrystalline core. An insulator layer encapsulates each nanocrystalline shell and anisotropic nanocrystalline core pairing.
Abstract:
The invention relates to nanomaterials and assemblies including, a micrometer-scale spherical aggregate comprising: a plurality of one-dimensional nanostructures comprising titanium and oxygen, wherein the one-dimensional nanostructures radiate from a hollow central core thereby forming a spherical aggregate.
Abstract:
A method for the preparation of functionalized particles includes providing a feedstock that includes particles, a surface treatment agent reactive with the particles and solvent. The feedstock is direct through a continuous hydrothermal reactor maintained at a temperature sufficient to react the particles with the surface treatment agents to thereby provide functionalized particles. The method of the invention is capable of providing the functionalized particles in less than about 4 hours.
Abstract:
Alumina particles and compositions containing alumina particles are disclosed. Methods of making alumina particles and methods of using alumina particles are also disclosed.
Abstract:
An alumina particle composite (1) includes an alumina particle (2) and an organic acid (3) chemically bonded to a surface of the alumina particle (2). Further, the alumina particle (2) has a short axis length of 1 to 10 nm, a long axis length of 20 to 400 nm, and an aspect ratio of 5 to 80, and is represented by Formula I, Al2O3.nH2O Formula I where n is 0 or more.
Abstract translation:氧化铝颗粒复合材料(1)包括氧化铝颗粒(2)和与氧化铝颗粒(2)的表面化学键合的有机酸(3)。 此外,氧化铝颗粒(2)的短轴长度为1〜10nm,长轴长度为20〜400nm,纵横比为5〜80,由式I表示,Al 2 O 3·nH 2 O式I 其中n为0以上。
Abstract:
The invention discloses dispersions of preferably modified strontium carbonate in organic liquids, for example in alcohols, ketones or particularly methylene chloride. The dispersions are usable for the preparation of polymers which have reduced birefringence or no birefringence and are therefore suitable for optical applications.The powder obtainable after the removal of the organic liquid can surprisingly be converted back to a dispersion with little energy.