Process for producing silver tantalate niobate nano-powder

Abstract

The invention discloses a method for preparing the sol-gel of Ag(Nb, Ta)O3 (silver tanto-niobate) nano-powder on the basis of the presence of potassium carbonate as a co-solvent. The method comprises the following steps: (1) preparing the citric acid solution of niobium; (2) preparing the citric acid solution of tantalum; (3) preparing the citric acid solution of silver; and (4) preparing the silver tanto-niobate (Ag(Nb, Ta)O3) sol and obtaining the nano-powder. The invention overcomes the defects of the preparing process caused by the existing presence of highly corrosive hydrofluoric acid and the Ag(Nb, Ta)O3 (silver tanto-niobate) ceramic nano-powder with the average particle diameter being 20 to 50 nm can be prepared.

Description

technical field [0001] The invention relates to a method for preparing silver tantalum niobate, in particular to a method for preparing silver tantalum niobate (Ag(Nb, Ta)O 3 ) method of nanopowder. Background technique [0002] The rapid development of the communication industry and the continuous popularization of mobile communications have made the development of electronic materials face severe challenges, requiring electronic devices to develop in the direction of high performance, high stability, and miniaturization. High-frequency dielectric components are one of the key components that affect communication quality, and high-frequency dielectric ceramics are key materials for preparing high-frequency dielectric devices. According to the electrolyte theory, when the operating frequency is constant, the size of the dielectric component is related to the dielectric constant of the dielectric material. For high-frequency capacitors, increasing the dielectric constant of...

AI Technical Summary

Problems solved by technology

[0004] Currently, regarding Ag(Nb, Ta)O 3 The preparation method of dielectric ceramics is mainly based on solid-phase synthesis, but there are many unavoidable disadvantages in this method: (1) Mechanical mixing cannot eliminate the uneven microscopic distribution of raw materials, making it difficult for the diffusion process to proceed smoothly, so it is difficult for raw materials to fully react (2) It is easy to introduce some impurities and damage the performance of ceramic materials; (3) It is difficult to achieve a mechanically refined particle size below 1 μm, which is difficult to meet the strict quality requirements of high-frequency ceramics; (4) The prepared powder The bulk reactivity is poor, and the sintering temperature of the ceramic body is high

The use of chemical methods can overcome the shortcomings of using solid-phase methods. However, due to the current preparation of Ag(Nb, Ta)O 3 The chemical method used in nanopowder uses highly corrosive hydrofluoric acid, etc., which limits the use of this chemical method to a certain extent.