摘要:
A process for preparing nickel hydroxide by alkaline precipitation from nickel salt solutions in the presence of complexing agents, in which the precipitation is carried out at at least two different locations in the same mother liquor with different precipitation kinetics at the different locations and the mother liquor is mixed prior to agglomeration of the precipitated primary crystals, is described.
摘要:
The invention relates to a method for producing lithium-transition metal mixtures of general formula Lix(M1yM21-y)nOnz, wherein M1 represents nickel, cobalt or manganese, M2 represents chromium, cobalt, iron, manganese, molybdenum or aluminium, and is different from M1, n is 2 if M1 represents manganese and is 1 otherwise, x is comprised between 0.9 and 1.2, y is comprised between 0.5 and 1.0 and z is comprised between 1.9 and 2.1. According to the inventive method, an intimate mixture composed of transition metal compounds containing oxygen and of a lithium compound containing oxygen is calcinated, said mixture being obtained by processing a solid powder transition metal compound with a solution of said lithium compound, and then drying. At least the M1 compound is used in powder form having a specific surface of at least 20 m2/g (BET) and calcination is carried out in a fluidised bed.
摘要翻译:本发明涉及一种制备通式为Lix(M 1 yM 2-y)n O n z的锂 - 过渡金属混合物的方法,其中M 1表示镍,钴或锰,M 2表示铬 ,钴,铁,锰,钼或铝,并且不同于M 1,如果M 1表示锰,则n为2,否则为1,x为0.9至1.2,y为0.5至1.0 z在1.9和2.1之间。 根据本发明的方法,煅烧由含有氧的过渡金属化合物和含氧化合物的锂化合物组成的紧密混合物,所述混合物通过用所述锂化合物的溶液处理固体粉末过渡金属化合物,然后干燥而获得。 至少M 1化合物以比表面积至少为20m 2 / g(BET)的粉末形式使用,并且在流化床中进行煅烧。
摘要:
Microcrystalline bodies based on .alpha.-Al.sub.2 O.sub.3 are made by drying sub-micron powders, press compacting and shock sintering at an intermediate sinter temperature range of 1,300.degree. to 1,550.degree. C., i.e. bringing the compact up to such range in under 60 seconds, preferably under 10.