Apparatus and method for preparing high-purity barium titanate

Abstract

The invention relates to an apparatus and a method for preparing high-purity barium titanate. According to the apparatus, a storage tank (1) is connected to the inlet of a reaction kettle (10) througha first pipeline (15) and a first valve (2), the outlet of the reaction kettle (10) is connected to the inlet of a buffer tank (7) through a second pipeline (16) and a second valve (4), the outlet ofthe buffer tank (7) is connected to an air filter (11) through a third pipeline (17) and a third valve (6), the air filter (11) is connected to a vacuum pump (13) through a fourth pipeline (18) and afourth valve (12), the bottom outlet of the buffer tank (7) is connected to a waste liquid groove (9) through a fifth pipeline (19) and a fifth valve (8), the second pipeline (16) is connected to a sixth valve (20), and the buffer tank (7) is provided with a vacuum meter gauge (5). According to the present invention, the apparatus has advantages of simple equipment, low reaction temperature, environmental protection and energy saving, and the obtained barium titanate powder can meet the requirements of electronic components such as MLCC, PTC and the like.

Description

technical field [0001] The invention belongs to the field of nano powder material manufacture, and relates to a device and method for preparing high-purity barium titanate. Background technique [0002] In recent years, driven by the trend of device miniaturization (high integration requirements of microelectronic devices, such as multilayer ceramic capacitors MLCC), nano-BaTiO 3 The performance of the material has been improved. High-performance MLCC requires high-quality dielectric constant and ultra-fine BaTiO with high-purity, homogeneous, and weakly agglomerated particles with small and uniform sizes 3 Based ceramic powder particles, the performance can be improved by reducing the thickness of the ceramic layer. The hydrothermal synthesis preparation method of barium titanate powder is an important industrial process method, which can prepare ultra-fine ceramic dielectric layers suitable for MLCC, PTC and other technologies. [0003] Traditional BaTiO 3 Nanoparticle...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the need for higher reaction temperature in the "one-pot method" production and preparation of barium titanate materials in the existing hydrothermal synthesis reaction device, and the problem that it is easy to dissolve in the air under the condition of alkaline mineralizer or barium source. Combination of carbon dioxide produces impurities such as barium carbonate, which affects the crystallinity, shape, size uniformity of barium titanate particles, and produces waste gas, waste liquid and other environmental pollution problems. Provide a device and method for preparing high-purity barium titanate

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