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Composite nanoparticle with calcium fluoride coated with aluminum oxide and preparation method thereof

A technology for compounding nanoparticles and coating calcium fluoride, which is applied in the field of coating and modifying the surface of nano-materials, can solve the problems of limited application of nano-calcium fluoride, and achieves good coating effect, low cost and uniform particle size. Effect

Active Publication Date: 2018-03-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no attempt to modify the surface of nano-calcium fluoride in the prior art to solve the problem of limited application of nano-calcium fluoride in self-lubricating ceramic tools

Method used

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  • Composite nanoparticle with calcium fluoride coated with aluminum oxide and preparation method thereof

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Embodiment 1

[0041]Weigh 100ml of ammonia water and ethanol solution in a volume ratio of 1:4, put the two in a beaker and mix them evenly to obtain solution A. According to the volume ratio of 1:4, weigh a total of 150ml of xylene solution and ethanol solution, and place them in two beakers for later use. Take an appropriate amount of polyvinylpyrrolidone (PVP) and add it to the ethanol solution, ultrasonically disperse and mechanically stir for 20 minutes, so that the concentration of PVP contained in the solution is 5g / L, and an ethanol solution containing polyvinylpyrrolidone is obtained. Take the xylene solution, add it into the ethanol solution under stirring condition, make it mix evenly, and divide it into two parts according to the volume ratio of 2:1, and obtain two solutions of B and C. Weigh 0.01 mol of calcium fluoride material, add it into solution B under ultrasonic and stirring conditions, and continue ultrasonic stirring for 30 minutes. Dissolve 0.03 mol of aluminum nitra...

Embodiment 2

[0045] Weigh 100ml of ammonia water and ethanol solution in a volume ratio of 1:4, put the two in a beaker and mix them evenly to obtain solution A. Take by weighing ethanol solution 150ml, take appropriate amount of polyvinylpyrrolidone (PVP) and join ethanol solution, ultrasonic dispersion and mechanical stirring 20min, the concentration of PVP contained in the preparation solution is 5g / L, must contain the ethanol solution of polyvinylpyrrolidone, and by volume The ratio of 2:1 is divided into two parts, and two solutions of B and C are obtained. Weigh 0.01 mol of calcium fluoride material, add it into solution B under ultrasonic and stirring conditions, and continue ultrasonic stirring for 30 minutes. Dissolve 0.03 mol of aluminum nitrate solid material in 10 ml of distilled water, add it into solution C under stirring condition, and continue ultrasonic stirring for 5-10 minutes. Mix solution B and solution C under ultrasonic and stirring conditions to obtain solution D, ...

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Abstract

The invention discloses a composite nanoparticle with calcium fluoride coated with aluminum oxide and a preparation method thereof. The preparation method comprises the following steps of (1) mixing polyvinylpyrrolidone and ethyl alcohol according to a certain ratio, stirring, adding xylene, uniformly mixing, and separating into two parts, namely a solution B and a solution C; (2) adding nanometercalcium fluoride powder into the solution B under the stirring condition, and uniformly dispersing, so as to obtain a solution B'; adding aluminum nitrate into the solution C, and uniformly mixing, so as to obtain a solution C'; (3) mixing the solution B' and the solution C', slowly adding an ammonium hydroxide and ethyl alcohol mixed solution until the pH (potential of hydrogen) value of the solution is 7 to 12, continuing to stir until reaction is finished, standing and aging the obtained product, centrifuging and separating a solid product, heating and dewatering, so as to obtain the composite nanoparticle with calcium fluoride coated with aluminum oxide. The preparation method has the characteristics that the technology is simple, and the cost is low. The prepared nanometer compositepowder has the advantages that the dispersivity is better, the coating effect is better, the coating rate is higher, the particle size is uniform, and the surface characteristic of the calcium fluoride particle is well improved.

Description

technical field [0001] The invention relates to the field of surface coating and modification of nanometer materials and a preparation method thereof, in particular to a composite nanoparticle material with aluminum oxide coated on the surface of nanometer calcium fluoride and a preparation method thereof. technical background [0002] The research progress of nanomaterials undoubtedly promotes the progress and development of society. Some unique characteristics of nanoparticles make it a key field of research. It is a further step to modify the surface of nanomaterials and obtain new physical and chemical properties. An effective means to improve the performance of nanomaterials. [0003] For self-lubricating ceramic tools that can be applied to dry cutting, calcium fluoride is an important lubricating phase used in self-lubricating tool materials, which effectively reduces the friction coefficient of the tool and improves the cutting performance of the tool. Furthermore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C04B35/63
CPCC04B35/62813C04B35/6303C04B2235/445
Inventor 陈照强郭润鑫许崇海衣明东郭念升
Owner QILU UNIV OF TECH
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