Abstract:
La présente invention est relative à un procédé de préparation d'un oxyde à base de cérium et/ou de zirconium dans lequel on utilise une irradiation par une onde électromagnétique afin de sécher un produit intermédiaire. L'invention est aussi relative à un oxyde susceptible d'être obtenu par ledit procédé.
Abstract:
Poudre de particules, plus de 95% en nombre desdites particules présentant une circularité supérieure ou égale à 0,85, ladite poudre contenant plus de 99,8% d'un oxyde de terre rare et/ou d'oxyde d'hafnium et/ou d'un oxyde d'aluminium, en pourcentage par masse sur la base des oxydes, et ayant : - une taille médiane de particule D 50 inférieure à 15 µm, un percentile 90 des tailles de particules D 90 inférieur à 30 µm, et un indice de dispersion de taille (D 90 – D 10 )/D 10 inférieur à 2; - une densité relative supérieure à 90%.
Abstract:
Disclosed herein is zinc/amino acid functionalized silica, compositions comprising the same, and oral care methods and uses for such compositions.
Abstract:
A method for synthesizing mesoporous lithium manganese dioxide micro/nanostructures, in accord with an implementation, includes preparing an aqueous metal salt solution by dissolving a lithium ion source and a manganese ion source in water, and subjecting the aqueous metal salt solution to an anodic electrodeposition process. The anodic electrodeposition process may include transferring the aqueous metal salt solution to an electrodeposition bath comprising an anode electrode and a cathode electrode, such that the anode electrode and the cathode electrode are immersed in the transferred aqueous metal salt solution, and applying a pulse reverse current through the electrodeposition bath to obtain lithium manganese dioxide deposited on a surface of the anode electrode.
Abstract:
Kaolin compositions comprising coarse kaolin particles are disclosed herein. The kaolin compositions can include kaolin particles having a GE brightness of at least 78 and a particle size distribution wherein at least 50% by weight of the kaolin particles have an equivalent size diameter (e.s.d.) of 30 μm or greater. In some embodiments, the kaolin compositions can include kaolin particles having a bimodal particle distribution. In other embodiments, the kaolin compositions can include kaolin particles having a low crystalline silica content, such as a crystalline silica content of 0.1% by weight or less and a particle size distribution wherein at least 50% by weight of the kaolin particles have an equivalent size diameter (e.s.d.) of 15 μm or greater. In some embodiments, the kaolin particles can be free of crystalline silica. Methods of making and using the kaolin compositions are also disclosed herein.
Abstract:
Methods of producing rod-shaped mesoporous carbon nitride (MCN) materials are described. The method includes (a) obtaining a template reactant mixture comprising an uncalcined rod-shaped SBA-15 template, a carbon source compound, and a nitrogen source compound; (b) subjecting the template reactant mixture to conditions suitable to form a rod-shaped template carbon nitride composite; (c) heating the rod-shaped template carbon nitride composite to a temperature of at least 500 °C to form a rod-shaped mesoporous carbon nitride material/SB A-15 (MCN-SBA-15) complex; and (d) removing the SBA-15 template from the MCN-SBA-15 complex to produce a rod-shaped mesoporous carbon nitride material.
Abstract:
The present invention provides a particularly advantageous form of alkaline earth metal hydroxystannate and alkaline earth metal stannate exhibiting a BET specific surface area of from 20 to 200 m2/ g. A method of producing such particulate material and evidence of its benefits in use such as in at a reduction in a polymer sample at elevated temperature is also disclosed.
Abstract:
The present invention is an improved method of production of graphenic materials used to store energy and the energy storage systems using such produced graphenic materials. Provided herein is a method of producing graphene oxide that includes oxidizing graphite powder in a mixture of H 3 PO 4 and H 2 SO 4 in the presence of KMnO 4 , wherein the ratio of graphite powder to KMnO 4 is about 1:9 by weight and the ratio of H 3 PO 4 to H 2 SO 4 is about 1:9 by volume, to produce graphene oxide; dispersing the graphene oxide in water at an acidic pH (e.g., about 0) to form a solution; adjusting the solution to about a neutral pH; and isolating the graphene oxide. An energy storage device is provided herein that includes the graphene oxide made by the disclosed methods or that includes the population (plurality) of reduced graphene oxide particles having the properties disclosed herein, such as batteries and supercapacitors.
Abstract translation:本发明是一种改进的用于储存能量的石墨烯材料的生产方法以及使用这种生产的石墨烯材料的能量储存系统。 本文提供一种生产氧化石墨烯的方法,其包括在H 3 PO 4和H 2 SO 4的混合物中氧化石墨粉末, 其中石墨粉末与KMnO 4的比例按重量计约为1:9,并且H 2 / 从而产生氧化石墨烯;其中,所述氧化石墨烯的氧化还原电位为约1:1。 在酸性pH(例如约0)下将石墨烯氧化物分散在水中以形成溶液; 调节溶液至约中性pH; 并分离氧化石墨烯。 本文提供了一种储能装置,其包括通过所公开的方法制造的或包括具有本文公开的性质的还原氧化石墨烯颗粒群(多个)的电池和超级电容器的氧化石墨烯。 p>
Abstract:
Alumina products containing a fine particle size component and a coarse particle size component, and with specific particle size characteristics and irregular and non-spherical particle shapes, are disclosed. These alumina products can be used in polymer formulations to produce composites having high isotropic thermal conductivity.