Method for preparing nanospherical ferrosilicon red-coated pigment by microwave hydrothermal method

Abstract

The invention discloses a method for preparing a nanospherical ferrosilicon red-coated pigment by a microwave hydrothermal method, wherein the method comprises: firstly measuring a certain amount of deionized water into a beaker, adding iron chloride, enabling the iron chloride to be completely dissolved, adding borax into the solution of the previous step, and continuously stirring for 10min; dropping ethyl orthosilicate into the previous solution, then dropping 3mol / L of NaOH solution to regulate a pH value to a needed value, setting the temperature of a magnetic stirrer to be 40 DEG C, and continuously stirring for 120min; and moving the obtained mixed solution into a microwave hydrothermal reaction vessel for reaction at 180-210 DEG C, collecting the products after reaction, washing the products with deionized water until being neutral, and drying with a drying box to prepared the ferrosilicon red-coated pigment with 30-80nm of diameters and pure color. The method has prominent advantages of low preparation temperature, simple technology, and cheap and easily available raw material, so the method has a wide market prospect.

Description

technical field [0001] The invention belongs to the technical field of ceramic pigments, and in particular relates to a method for preparing nano-spherical ferrosilicon red-coated pigments by microwave hydrothermal method. [0002] Background technique [0002] Ferrosilicon red material is a kind of ceramic color material with bright color and high temperature stability. It can show bright pink in the blank, and it can show color stably under oxidizing atmosphere at 1250°C. It is widely used in vitrified bricks, etc. It has great application value in the decoration of products. At present, the solid phase method is used to prepare ferrosilicon red material, but it has defects such as high reaction temperature, long holding time, and large particle size of the obtained product, which is no longer suitable for the current industrial production requirements of energy saving, emission reduction, high efficiency and environmental protection. Contents of the invention The te...

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Problems solved by technology

At present, the solid-phase method is used to prepare ferrosilicon red material, but it has defects such as high reaction temperature, long holding time, and large particle size of the obtained product, which is no longer suitable for the current industrial production requirements of energy saving, emission reduction, high efficiency and environmental protection

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