Technology for synthesizing SrTiO3 nano-powder through mechanochemical method

Abstract

The invention relates to a technology for synthesizing SrTiO3 nano-powder through a mechanochemical method. The technology at least comprises the following steps: 1, taking a proper amount of each of strontium oxide and titanium dioxide raw materials, respectively dumping the raw materials into beakers, putting the beakers in an oven, and drying for 12h; 3, uniformly mixing the above two powders with a molar ratio of 1:1; 3, adding the above obtained powder mixture and tungsten carbide balls to a pot, wherein the total volume of the powder mixture and the tungsten carbide balls does not exceed 2 / 3 of the total volume of the pot, and a mass ratio of the powder mixture to the tungsten carbide balls is 20:1; 4, turning on a power switch, and uncovering the cover of a high-energy ball mill; 5, operating according to the flow of a high-energy ball milling experiment; 6, setting parameters comprising a rotating speed of 200rpm and a cycle period of 30min; 7, clicking a start button for the working starting of the ball mill; 8, uncovering the cover of the high-energy ball mill and the cover of the ball milling pot 24h later, sampling, cleaning the ball milling pot with alcohol, and drying for later use; and 7, turning off the power switch. The SrTiO3 nano-powder synthesized in the invention has the characteristics of low energy consumption, high purity, small particle size, high automation degree, good quality consistency and repetitiveness, less pollutant emission and the like.

Description

technical field [0001] The invention relates to a synthetic nano SrTiO 3 Powder technology, especially a mechanochemical method to synthesize nano-SrTiO 3 powder method. Background technique [0002] SrTiO 3 The material is a ternary compound with a perovskite structure. The perovskite structure makes it have good chemical stability and thermal stability, and the ternary compound makes it have good modification and doping space. SrTiO 3 The material has low dielectric loss and good thermal stability. It is an excellent electronic ceramic material. It is widely used in high-voltage capacitors, grain boundary layer capacitors, varistors, thermistors and other fields. It has miniaturization, high performance, high advantages such as reliability. [0003] Traditional SrTiO 3 The powder synthesis process is mainly a high-temperature solid-phase synthesis method, which has the disadvantages of high energy consumption (above 1000 degrees), low purity, and large particle size,...

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Problems solved by technology

[0003] Traditional SrTiO 3 The powder synthesis process is mainly a high-temperature solid-phase synthesis method, which has the disadvantages of high energy consumption (above 1000 degrees), low purity, and large particle size, and cannot obtain nano-scale fine materials

SrTiO obtained by traditional sol-gel method 3 Powder materials, small process batches, low automation, low quality consistency and repetition, and organic pollutant emissions.

At present, the domestic production of strontium titanate powder is mainly based on the traditional high-temperature solid-phase method, and it is impossible to obtain fine powder

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