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Preparation method of spherical strontium chromate powder controllable in micron-sized crystal growth morphology

A crystal growth, micron-level technology, applied in the direction of chromate/dichromate, etc., can solve the problems of complex strontium chromate powder process, unable to obtain the growth morphology of strontium chromate powder, etc., and achieve particle shape. Controllable appearance size, low cost and simple preparation method

Active Publication Date: 2014-01-08
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention is to solve the complex process of preparing strontium chromate powder in the existing method, and the growth morphology is mostly linear or rod-shaped without adding active additives, and it is impossible to obtain strontium chromate whose growth morphology is micron-scale spherical Powder technical problems, thus providing a method for preparing spherical strontium chromate powder with controllable micron-scale crystal growth and morphology

Method used

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  • Preparation method of spherical strontium chromate powder controllable in micron-sized crystal growth morphology
  • Preparation method of spherical strontium chromate powder controllable in micron-sized crystal growth morphology
  • Preparation method of spherical strontium chromate powder controllable in micron-sized crystal growth morphology

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specific Embodiment approach 1

[0015] Embodiment 1: The preparation method of a spherical strontium chromate powder with controllable micron-scale crystal growth morphology in this embodiment is carried out according to the following steps:

[0016] 1. Weigh 2.34g-23.4g of sodium chromate tetrahydrate (Na 2 CrO 4 .4H 2 O) Dissolved in distilled water to form a sodium chromate solution with a concentration of 0.1mol / L to 1mol / L;

[0017] 2. Weigh 2.67g~26.7g of strontium chloride hexahydrate (SrCl 2 .6H 2 O) Dissolved in distilled water to make a strontium chloride solution with a concentration of 0.1mol / L~1mol / L, then add 2g~8g of disodium EDTA to it, and adjust the pH value of the solution to 9~10 with ammonia water, then Then use dilute hydrochloric acid to adjust the pH value of the solution to 6-8 to obtain a mixed solution A;

[0018] 3. Add 30mL to 50mL of absolute ethanol to the mixed solution A obtained in step 2, start stirring at room temperature, and drop in the sodium chromate solution obta...

specific Embodiment approach 2

[0023] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, take by weighing 2.34g sodium chromate tetrahydrate (Na 2 CrO 4 .4H 2 O) Dissolved in distilled water and configured as a sodium chromate solution with a molar concentration of 0.1mol / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step 2, weigh 2.67g of strontium chloride hexahydrate (SrCl 2 .6H 2 O) Dissolved in distilled water to form a strontium chloride solution with a molar concentration of 0.1mol / L. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of inorganic non-metallic powder, in particular to a preparation method of spherical strontium chromate powder controllable in micron-sized crystal growth morphology, in order to solve the technical problems that an existing method for preparing the strontium chromate powder is complicated in technique, growth morphology under the condition of not adding active additives is mostly linear or rod-like and the strontium chromate powder micro-sized spherical in growth morphology cannot be obtained. The method includes: firstly, preparing a sodium chromate solution; secondly, preparing a mixed solution A; thirdly, preparing a mixed solution B; fourthly, preparing the spherical strontium chromate powder controllable in the micron-sized crystal growth morphology. Preparation is carried out only at the room temperature, conditions are mild and easy to control, cost is low, the preparation method is simple, and mass production is facilitated; the prepared strontium chromate powder is controllable in particle morphology and size, excellent in performance and capable of achieving large-scale batch production. The preparation method is applied to the field of preparation of the inorganic non-metallic powder.

Description

technical field [0001] The invention relates to a preparation method of an inorganic non-metallic powder material. Background technique [0002] In recent years, chromate has broad application prospects in the fields of high-temperature solid lubricants, photoconductive dielectric materials, luminescent materials, catalysts, and industrial pigments, and the crystal growth morphology, particle size, and crystal structure of chromate have great influence on its performance. Therefore, how to prepare powders with different morphologies is very important for its subsequent performance research. At present, the main methods for preparing strontium chromate ceramic powder include template method, hydrothermal method, etc., and the preparation method is relatively complicated. Without any active additives, the crystal morphology of strontium chromate powder prepared by template method and hydrothermal method is micro-nano wire or rod-shaped product, and it is impossible to obtain ...

Claims

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Application Information

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IPC IPC(8): C01G37/14
Inventor 欧阳家虎刘凡刘占国
Owner HARBIN INST OF TECH
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