Preparation method of nano calcium fluoride for self-lubricating tool material

A tool material, calcium fluoride technology, applied in nanotechnology, calcium/strontium/barium fluoride, calcium/strontium/barium halide, etc., can solve the problem of not being able to prepare self-lubricating tool materials

Inactive Publication Date: 2012-07-18
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the calcium fluoride obtained in this invention is nano-scale, it is hollow and cannot be used to prepare self-lubricating tool materials

Method used

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  • Preparation method of nano calcium fluoride for self-lubricating tool material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 4.72g of calcium nitrate and 1.85g of ammonium fluoride according to the molar ratio of 1:2.5, put them into beakers respectively, add 10ml of distilled water and 10ml of absolute ethanol respectively, shake well and dissolve, and obtain the pre-prepared calcium nitrate and ammonium fluoride solution; weigh 0.8 g of PEG6000, add it to 200 ml of absolute ethanol, and ultrasonically disperse it for 20 minutes to completely dissolve it to obtain a composite solvent of polyethylene glycol and absolute ethanol. Divide the prepared composite solvent into two parts in equal amounts, add to the pre-prepared calcium nitrate and ammonium fluoride solutions respectively, stir magnetically for 60 minutes, and disperse ultrasonically for 20 minutes; the dispersed calcium nitrate solution and ammonium fluoride solution are obtained.

[0028] Under ultrasonic and stirring conditions, pour the dispersed calcium nitrate solution into the dispersed ammonium fluoride solution, and re...

Embodiment 2

[0031] Weigh 4.72g of calcium nitrate and 1.85g of ammonium fluoride according to the molar ratio of 1:2.5, put them into beakers respectively, add 8ml of distilled water and 10ml of absolute ethanol respectively, shake well and dissolve, and obtain the pre-prepared calcium nitrate and ammonium fluoride solution; weigh 0.9 g of PEG6000, add it to 250 ml of absolute ethanol, and ultrasonically disperse it for 10 minutes to completely dissolve it to obtain a composite solvent of polyethylene glycol and absolute ethanol. Divide the prepared composite solvent into two equal parts, add them to the pre-prepared calcium nitrate and ammonium fluoride solutions respectively, stir magnetically for 45 minutes, and disperse ultrasonically for 30 minutes; the dispersed solution containing calcium nitrate and ammonium fluoride The solution.

[0032] Under the conditions of ultrasound and stirring, pour the dispersed calcium nitrate solution into the dispersed ammonium fluoride solution and ...

Embodiment 3

[0035] Weigh 4.72g of calcium nitrate and 1.85g of ammonium fluoride according to the molar ratio of 1:2.5, respectively put them into beakers, add 10ml of distilled water and 15ml of absolute ethanol, shake well and dissolve, and obtain the pre-prepared calcium nitrate and ammonium fluoride solution; weigh 1.3 g of PEG6000, add it to 300 ml of absolute ethanol, and disperse it ultrasonically for 30 minutes to completely dissolve it to obtain a composite solvent of polyethylene glycol and absolute ethanol. Divide the prepared composite solvent into two equal parts, add to the pre-prepared calcium nitrate and ammonium fluoride solutions respectively, stir magnetically for 80 minutes, and disperse ultrasonically for 15 minutes; the dispersed calcium nitrate solution and ammonium fluoride solution are obtained.

[0036] Under ultrasonic and stirring conditions, pour the dispersed calcium nitrate solution into the dispersed ammonium fluoride solution, and react for 4.5 minutes. Th...

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Abstract

The invention relates to a preparation method of nano calcium fluoride for a self-lubricating tool material. According to the preparation method, an ultrasonic reduction method is adopted. The preparation method comprises the following steps of: preparing calcium nitrate and ammonium fluoride serving as raw materials into aqueous or alcohol solution respectively; adding PEG 6000-abslute ethyl alcohol composite solvent; performing ultrasonic dispersion; mixing the dispersed calcium nitrate solution and the ammonium fluoride solution under ultrasonic and stirring conditions; and reacting, aging, centrifuging, cleaning and drying to obtain nano calcium fluoride powder. The prepared nano calcium fluoride has the particle size of 15-50 nm and has high purity, complete crystal form, high crystallinity, uniform size distribution and high dispersion. The preparation method also has the advantages of simple technical process, convenience for operation and low equipment requirements.

Description

technical field [0001] The invention relates to a preparation method of nano-calcium fluoride, in particular to a preparation method of nano-calcium fluoride for self-lubricating tool materials. Background technique [0002] The preparation of self-lubricating tool materials by introducing solid lubricants is one of the important research contents in the field of high-speed dry cutting. This kind of cutting tool material itself has anti-friction, wear-resistant and lubricating energy, and can realize self-lubricating cutting process without adding lubricating fluid or lubricant. Calcium Fluoride (CaF 2 ) is a commonly used solid lubricant. However, the study found that ordinary micron-sized CaF 2 Although it is beneficial to improve the friction performance of the material when added to the composite ceramic material system as an additive phase, it will damage the mechanical properties of the material. Al prepared by JianxinDeng et al. 2 o 3 / TiC / CaF 2 The friction an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/22B82Y40/00
Inventor 许崇海衣明东方斌魏高峰冯益华
Owner QILU UNIV OF TECH
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