A kind of method that utilizes strontium hydroxide and silica fume to prepare strontium silicate powder material

A technology of strontium hydroxide and sodium hydroxide, used in chemical instruments and methods, luminescent materials, lubricating compositions, etc., can solve the problems of reduced luminous brightness, unfavorable energy saving and environmental protection, and high preparation temperature, and achieves improved high-temperature friction performance and cost. Inexpensive, good stability effect

Active Publication Date: 2021-11-16
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

However, the high-temperature solid-phase method also has its disadvantages, such as high preparation temperature, which is not conducive to energy saving and environmental protection, coarse grains, and reduced luminous brightness after grinding

Method used

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  • A kind of method that utilizes strontium hydroxide and silica fume to prepare strontium silicate powder material
  • A kind of method that utilizes strontium hydroxide and silica fume to prepare strontium silicate powder material

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Embodiment Construction

[0017] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0018] refer to figure 1 , the present invention utilizes strontium hydroxide and silica fume to prepare the method for strontium silicate powder material, comprises the steps:

[0019] (1) According to the molar ratio Sr:Si=1:1, C(NaOH)=1mol / L, weigh m(Sr(OH) 2 )=121.6g, m(SF)=60g, m(NaOH)=20g, m(H 2 (0) = 300 g.

[0020] (2) Place strontium hydroxide in water, fully stir and dissolve with a glass rod;

[0021] (3) Put the silica fume in water and fully stir and dissolve it with a glass rod;

[0022] (4) Sodium hydroxide is placed in water, fully stirred and dissolved with a glass rod;

[0023] (5) Mix the two solutions prepared in steps (2) and (3), stir well, seal and let stand at room temperature for 1 hour.

[0024] (6) Use a pH meter to measure the solution after standing in step (5) for 1 hour. If the pH is less than 13, add the sod...

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Abstract

The invention discloses a method for preparing strontium silicate powder material from strontium hydroxide and silica fume; the preparation method is to dissolve strontium hydroxide, silica fume and sodium hydroxide respectively and then stir them; The sample is placed in a Buchner funnel for low-pressure suction filtration, and then the strontium silicate powder after suction filtration is vacuum-dried to obtain a strontium silicate powder material. Wherein, the consumption of strontium hydroxide, silica fume and water are respectively 12.5%, 25% and 62.5%, and the consumption of sodium hydroxide is determined according to the pH of the mixed solution. Strontium silicate powder material has good stability at high temperature. It can not only be used as a sintering aid to promote the sintering of composite materials, but also can be used as a solid lubricant to improve the high-temperature friction properties of composite materials. At the same time, strontium silicate doped with rare metal elements can also be used as a new type of long afterglow material. The invention directly uses silica fume without any pretreatment as a raw material to directly synthesize strontium silicate powder materials by hydrothermal method, which can replace high-temperature synthesis, sol-gel and other synthesis processes of strontium silicate powder materials, and has the advantages of simple process, The cost is low, and high value-added utilization of industrial solid waste can be realized.

Description

technical field [0001] The invention belongs to the field of preparation of silica fume salt powder, in particular to a method for preparing strontium silicate powder material by using strontium hydroxide and silica fume. Background technique [0002] Long afterglow materials can be roughly divided into 3 categories, sulfide materials, aluminate materials and silicate materials. The sulfide system has not been widely used due to its poor chemical stability, while the long-lasting materials of the aluminate system are widely used, there are many related researches, and the preparation process is relatively mature. The long afterglow material of the silicate system has excellent performance. In recent years, a lot of research has been carried out on the preparation of silicate materials at home and abroad. [0003] Strontium silicate is a long-lasting luminescent material with good chemical stability and strong water resistance, and its luminescent color is complementary to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59C10M125/26C10N30/08C10N30/06
Inventor 李琦胡亚茹宋强张军王倩
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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