Method for preparing nano grade iron oxide red

Abstract

The invention discloses a nanoscale iron oxide red preparation method, comprising the steps as follows: firstly, alkaline material is dissolved in water so that alkaline solution is prepared; secondly, the alkaline solution is mixed with crystalline control agent, and a certain amount of the mixed solution is collected and added into ferric sulfate solution at the temperature of 30 to 50 DEG C until the pH value is 8 to 10, and then is heated to 65 to 75 DEG C for reaction, so that colloid is produced and seed crystal is prepared; thirdly, the pH value is adjusted to 2 to 5, and a certain amount of ferrous sulfate solution is added and heated to 85 to 110 DEG C, and takes aging reaction for 3 to 9 hours; fourthly, after filtering, the filter cake is rinsed with water, dried and crushed, so that transparent iron oxide powder is obtained; and finally, the iron oxide powder is calcined at the temperature of 280 to 400 DEG C, dried and crushed, so transparent nanoscale iron oxide red is obtained. The prepared transparent iron oxide red has the advantages of uniform particle-size distribution, pure color phase, good dispersity, simple preparation process, strong controllability, short production cycle and high efficiency, and has no pollution to the environment.

Description

A kind of preparation method of nanoscale iron oxide red technical field The invention relates to the field of production methods of iron oxide red, in particular to a preparation method of nanoscale iron oxide red. Background technique Nano science and technology is a new technology that was born and emerged in the late 1980s. Its basic connotation refers to understanding and transforming nature in the range of nanometer size (10-9-10-7m), and creating New substances, as well as transforming existing substances to have new properties. Nanomaterials have basic characteristics such as quantum size effect, small size effect, surface effect and macroscopic quantum tunneling effect. These basic characteristics make nanomaterials have many potential physical and chemical properties different from conventional materials, thus causing people to develop and utilize nanomaterials A strong interest in the material. Nano-iron oxide is a large class of nano-powder materials researc...

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Problems solved by technology

The present invention aims at the current problems such as difficulty in controlling the particle size and shape of iron oxide red, poor dispersibility, impure hue, etc., as well as the disadvantages of high production cost, high equipment requirements, complex process, long cycle and low yield, and provides a particle size The preparation method of nano-scale iron oxide red with uniform diameter distribution, good dispersion and pure hue has the advantages of low production cost, no special requirements for equipment, simple process and short cycle

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