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Method for preparing ZnO nanometer powder by ultrasonic ball milling

A nano-powder and ultrasonic technology, which is applied in the preparation of ZnO nano-powder and the field of ultrasonic ball milling of ZnO nano-powder, can solve the problems of limiting the use range of ZnO nano-powder and affecting the nano-scale performance of ZnO nano-powder, and achieves cheap equipment. , low cost, low energy consumption

Active Publication Date: 2010-05-26
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Then, by heating the mixture, Zn(OH) 2 Decomposed into ZnO and H 2 O steam, and finally get ZnO nano powder with higher purity; ZnO nano powder prepared by this method, due to the heating process, causes the nano ZnO powder to grow up, thereby affecting the nano properties of the final product ZnO nano powder and the nanometer size of the powder. order of magnitude, which limits the scope of use of ZnO nanopowders

Method used

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  • Method for preparing ZnO nanometer powder by ultrasonic ball milling
  • Method for preparing ZnO nanometer powder by ultrasonic ball milling
  • Method for preparing ZnO nanometer powder by ultrasonic ball milling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] First, take 40 grams of metal zinc particles with an average particle size of 1 to 3 mm, 1200 grams of grinding balls with a diameter of 8 cm, and a ball-to-material ratio of 30:1. Ionized water is used as the ball milling fluid; then, the input frequency to the ultrasonic energy converter in the ball mill bucket is: 60KHz, and the power density is: 0.56W / cm 2 At the same time, start the ball mill, and control the speed to be 150r / min for ball milling; after 40 hours, sampling inspection, powder particle size has reached the process design requirements, stop ball milling; suction filtration, filter residue at 30 ℃, vacuum degree is 10 -1 Pa, drying, that is, to obtain pure ZnO nano powder. After testing, the obtained ZnO nano powder has a particle size of less than 100 nm and a purity of 100%, as shown in Table 1.

[0034] Table 1

[0035]

Embodiment 2

[0037] First, take 40 grams of metal zinc particles with a particle size of 1-3 mm, 1600 grams of grinding balls with a diameter of 10 cm, and a ball-to-material ratio of 40:1. Water is used as the ball mill liquid; then, the input frequency to the ultrasonic energy converter in the ball mill bucket is: 40KHz, and the power density is: 1.12W / cm 2 At the same time, start the ball mill, and control the speed to 250r / min for ball milling; after 25 hours, sampling inspection, the powder particle size has reached the process design requirements, stop the ball milling; suction filtration, filter residue at 40 ℃, vacuum degree is 10 -2 Pa, drying, that is, to obtain pure ZnO nano powder. After testing, the obtained ZnO nano powder has a particle size of less than 50nm and a purity of 100%, as shown in Table 2.

[0038] Table 2

[0039]

Embodiment 3

[0041] First, take 40 grams of metal zinc particles with a particle size of 1 to 3 mm, 2000 grams of grinding balls with a diameter of 12 cm, and a ball-to-material ratio of 50:1. Water is used as the ball milling fluid; then, the input frequency to the ultrasonic energy converter in the ball mill barrel is: 28KHz, and the power density is: 1.70W / cm 2At the same time, start the ball mill, and control the speed to be 350r / min for ball milling; after 20 hours, sampling inspection, the powder particle size has reached the process design requirements, stop the ball milling; suction filtration, filter residue at 40 ℃, vacuum degree is 10 -2 Pa, drying, that is, to obtain pure ZnO nano powder. After testing, the obtained ZnO nano powder has a particle size of about 20nm and a purity of 100%, as shown in Table 3.

[0042] table 3

[0043]

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Abstract

The invention provides a method for preparing ZnO nanometer powder by ultrasonic ball milling. The method comprises the following steps of: ball-milling metal zinc in an ultrasonic environment, filtering ball-milling solution under vacuum; and drying filter residues under vacuum and at a low temperature to obtain the purified ZnO nanometer powder. The method utilizes the organic coupling of ultrasound fields and mechanical force fields and adopts the ball-milling process under an ultrasonic action to change the metal Zn directly into single-phased and purified ZnO nanometer powder in one step. The method utilizes the organic coupling of ultrasound fields and mechanical force fields for the first time to successfully prepare the ZnO nanometer powder, organically combines the physical method and the chemical method; no other catalysts, refiners and other organic reaction solvents are unnecessarily added in the preparation process; and the method also has the advantages of simple process, lower-priced equipment, easy operation, easily bought materials, environmental protection and no pollution, high product purity, low cost, less energy consumption and the like, and the ZnO nanometer powder, prepared by the method, has quite good industrialization prospect.

Description

technical field [0001] The invention discloses a preparation method of ZnO nano powder, in particular to a preparation method of ZnO nano powder by ultrasonic ball milling; it relates to the technical field of metal oxide nano powder preparation. Background technique [0002] Nano-zinc oxide is an inorganic powder material composed of extremely fine grains and the characteristic dimension is on the order of nanometers (1-100nm). Compared with general-sized zinc oxide, nano-sized zinc oxide has a small size effect, surface and Interface effect, quantum size effect, macroscopic quantum tunneling effect, etc., so it has many unique or superior properties, such as non-toxicity, non-migration, fluorescence, piezoelectricity, ability to absorb and scatter ultraviolet rays, etc. The existence of these characteristics further promotes the application of zinc oxide, such as gas sensors, varistors, ultraviolet shielding materials, high-efficiency photocatalysts, etc. [0003] The pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/10
Inventor 陈鼎
Owner HUNAN UNIV
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