Preparation method of self-lubrication material nanometer calcium fluoride for ceramic cutting tool

A technology of self-lubricating materials and ceramic cutting tools, which is applied in the direction of nanotechnology, nanotechnology, and nanotechnology for materials and surface science, can solve the problems that cannot be used to prepare self-lubricating cutting tool materials, and achieve short preparation time and Easy to operate, good dispersion effect

Inactive Publication Date: 2014-12-24
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 self-lubrication material nanometer calcium fluoride for ceramic cutting tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 12.8g of calcium nitrate and 5.05g of ammonium fluoride according to the molar ratio of 1:3.0, put them into beakers respectively, add 25ml of distilled water and 25ml of absolute ethanol respectively, shake well and dissolve, and obtain the pre-prepared calcium nitrate and ammonium fluoride solution; weigh 0.75g of PEG6000, add the pre-prepared ammonium fluoride solution, ultrasonically disperse for 15 minutes, and dissolve it completely to obtain a composite solvent of polyethylene glycol and ammonium fluoride solution, wherein polyethylene glycol The weight concentration of alcohol PEG6000 is 1.5%.

[0026] The magnetic stirring temperature was set at 35°C. Under the magnetic stirring condition, the calcium nitrate solution was quickly dropped into the dispersed ammonium fluoride solution (the dropping speed was 10ml / min) from the separatory funnel, and reacted for 5 minutes. The reacted solution was taken out for ultrasonic dispersion for 5 min, and left...

Embodiment 2

[0029] Weigh 6.4g of calcium nitrate and 2.525g of ammonium fluoride according to the molar ratio of 1:3.0, put them into beakers respectively, add 12.5ml of distilled water and 12.5ml of absolute ethanol, shake well and dissolve, and obtain the pre-prepared Calcium nitrate and ammonium fluoride solution; weigh 0.5g of PEG6000, add the pre-prepared ammonium fluoride solution, ultrasonically disperse for 15 minutes, and dissolve it completely to obtain a composite solvent of polyethylene glycol and ammonium fluoride solution, wherein poly The weight concentration of ethylene glycol PEG6000 is 2%.

[0030] The magnetic stirring temperature was set at 20°C. Under the magnetic stirring condition, the calcium nitrate solution was dropped into the dispersed ammonium fluoride solution from the separatory funnel (the dropping speed was 1ml / min) and reacted for 5 minutes. The reacted solution was taken out for ultrasonic dispersion for 5 min, and left to age for 48 h. Centrifuge a...

Embodiment 3

[0033] Weigh 12.8g of calcium nitrate and 5.05g of ammonium fluoride according to the molar ratio of 1:3.0, put them into beakers respectively, add 25ml of distilled water and 25ml of absolute ethanol respectively, shake well and dissolve, and obtain the pre-prepared calcium nitrate and ammonium fluoride solution; weigh 0.5g of PEG6000, add the pre-prepared ammonium fluoride solution, ultrasonically disperse for 15 minutes, and dissolve it completely to obtain a composite solvent of polyethylene glycol and ammonium fluoride solution, wherein polyethylene glycol The weight concentration of alcohol PEG6000 is 1%.

[0034] The magnetic stirring temperature was set at 35°C. Under the condition of magnetic stirring, the calcium nitrate solution was dropped into the dispersed ammonium fluoride solution from the separatory funnel (the dropping speed was 30ml / min) and reacted for 5 minutes. The reacted solution was taken out for ultrasonic dispersion for 5 min, and left to age for...

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Abstract

The invention relates to a preparation method of a self-lubrication material nanometer calcium fluoride for a ceramic cutting tool. The preparation method comprises the following steps: (1) weighing calcium nitrate and ammonium fluoride, respectively placing in a beaker, adding distilled water and anhydrous ethanol, to obtain a calcium nitrate liquid with content of calcium nitrate being 1mol / l, and an ammonium fluoride liquid with content of ammonium fluoride being 2.2-3.2mol / l; (2) weighing a certain amount of polyethylene glycol (PEG6000) dispersing agent with molecular weight of 6000, adding the ammonium fluoride liquid so that the mass fraction of the polyethylene glycol in the liquid is 1-2%; performing ultrasonic dispersion for 10-15min, thoroughly dissolving, to obtain a polyethylene glycol-ammonium fluoride complex liquid; and (3) placing the polyethylene glycol-ammonium fluoride complex liquid into a magnetic stirrer, setting the reaction temperature of 15-50DEG C, dropping the calcium nitrate liquid in the polyethylene glycol-ammonium fluoride complex liquid through a separating funnel, appropriately adjusting the speed to be close to flow-in speed (drop-in speed is 1-30ml / min), wherein the stirring frequency under which no liquid is splashed is the best. The prepared nanometer calcium fluoride powder is high in purity, complete in crystal form, high in crystal degree, uniform in size distribution, and good in dispersity.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a preparation method of nano-calcium fluoride, a self-lubricating material for ceramic cutters. Background technique [0002] Self-lubricating tool means that the tool material itself has the functions of anti-friction, anti-wear and lubrication, and can realize self-lubricating cutting process without external lubricating fluid or lubricant, which can significantly improve the friction and lubrication state of dry cutting process. The solid lubricant is directly added to the tool material to prepare a composite tool containing the solid lubricant. During dry cutting, the solid lubricant on the rake face of the tool is "squeezed" out of the tool surface due to high temperature, friction and cutting force. Under the action of cutting temperature, the solid lubricant is in a plastic state and is dragged on the tool Surface, forming a solid wet film, thus endowing the tool with self-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/22B82Y30/00
Inventor 冯益华李福盟黄海霞许崇海万金领宫涛
Owner QILU UNIV OF TECH
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