Process of Production of Ammonium Niobium Oxalate, Ammonium Niobium Oxalate and use of the same

Abstract

The present invention relates to a process of production of ammonium niobium oxalate, to the ammonium niobium oxalate produced by said process that presents high puirity, monoclinic crystal structure, Nb content in the range from 10 to 30% by weight, which is stabel in contact with air at room temperature, and does not show polymerization by aging, is soluble in water, with a solubility in the range from 60 to 160 grams of niobium per liter of water, at temperatures from 20 to 80°C, and to the use of the same as a niobium precursor, suited for the synthesis of functionalized materials, such as ceramic, optical lenses, catalysts, high purity niobium oxides, thin films and crystals, in a macrometric to nanometric range, by preparation methods such as sol-gel, precipitation, deposition, impregnation and decomposition, wherein the niobium is the main constituent or is added to the composition as promoter or dopant.