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Method for preparing aluminum oxide nano bars

A technology of alumina nano and aluminum nitrate, applied in the direction of alumina/aluminum hydroxide, nanotechnology, etc., can solve the problems of complex process, low output, and difficulty in industrialization, and achieve good dispersion, low cost, and good shape controllable effect

Inactive Publication Date: 2012-07-04
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing alumina nanorods, which is quicker and easier than previous methods, and has low cost, and is used to overcome other disadvantages such as harsh process conditions, complicated process, low yield, and difficulty in industrialization.

Method used

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  • Method for preparing aluminum oxide nano bars
  • Method for preparing aluminum oxide nano bars
  • Method for preparing aluminum oxide nano bars

Examples

Experimental program
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Embodiment 1

[0016] Weigh 20g (0.1mol) of aluminum nitrate nonahydrate, 4.8g (0.15mol) of urea, 2.6g of starch, 1g of sodium chloride, and add 1ml of deionized water to grind into a colloid; ignite the resulting colloid at 450°C to obtain a gray-black precursor Then the precursor was ground until dispersed; the ground precursor was annealed at 1080°C for 0.5 hours, washed, and dried at 150°C for 2 hours to obtain alumina nanorods. The prepared aluminum oxide nanorods are single crystals with a diameter of 15nm-25nm, a length of 80nm-140nm, and an aspect ratio of 5-8.

Embodiment 2

[0018] Weigh 20g (0.1mol) aluminum nitrate nonahydrate, 6.4g (0.2mol) urea, 3g starch, 1.5g sodium chloride and sodium nitrate (mass ratio 1:1), add 1.5ml deionized water and grind into a colloid; The obtained colloid was ignited at 400°C to obtain a gray-black precursor, which was then ground until dispersed; the ground precursor was annealed at 1080°C for 0.5 hours, washed, and dried at 100°C for 2 hours to obtain alumina nanorods. like figure 2 As shown, the prepared alumina nanorods are single crystals with a diameter of 15nm-25nm, a length of 80nm-140nm, and an aspect ratio of 5-8.

Embodiment 3

[0020] Weigh 20g (0.1mol) of aluminum nitrate nonahydrate, 6.4g (0.2mol) of urea, 3.5g of cellulose, 1g of sodium nitrate, and add 1ml of deionized water to grind into a colloid; ignite the resulting colloid at 400°C to obtain a gray-black precursor Then the precursor was ground until dispersed; the ground precursor was annealed at 1080°C for 0.5 hours, washed, and dried at 200°C for 2 hours to obtain alumina nanorods. The prepared aluminum oxide nanorods are single crystals with a diameter of 15nm-25nm, a length of 80nm-140nm, and an aspect ratio of 5-8.

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Abstract

The invention relates to a method for preparing aluminum oxide nano bars. The method prepares the aluminum oxide nano bars through adopting a biology polysaccharide assisted low-temperature combustion, and comprises the following steps: firstly, aluminium nitrate salt, organic fuel urea, biology polysaccharide and trace mineral supplements are weighted in proportion, the supplements include one or any combination of two of NaNO3, NaC1 and KC1, the de-ionized water is added, the mixture is ground to be a colloid, and the colloid is thermally treated for 0.5 to 1 hour at the temperature of 1050to 1080 DEG C after being ignited at the temperature of 400 to 450 DEG C to obtain an a-Al2O3 nano bar with the diameter of 15 nm to 25 nm, the length of 80 nm to 140 nm, and the slenderness ratio being 5 to 8. The invention has a simple and quick process, and is low in cost; and the prepared aluminum oxide nano bars can be widely applied in the fields such as nano ceramics, composite reinforcements, biomedical materials and the like.

Description

technical field [0001] The invention relates to a method for preparing aluminum oxide nanorods, belonging to the field of new material synthesis. Background technique [0002] Alumina one-dimensional nanomaterials have the characteristics of high elastic modulus, high thermal conductivity and unique optical properties, and are widely used in the fields of catalysts or catalyst supports, ceramic materials, composite material reinforcements, biomedical materials and optical materials, including γ, θ or α phase. α-Al 2 o 3 One-dimensional nanomaterials are often used as reinforcing phases to adjust the microstructure of ceramics and composites to improve the mechanical properties of materials. Research shows that adding nanorod α-Al 2 o 3 The reinforcing phase can produce a bridging toughening effect, which can effectively improve mechanical properties such as toughness and flexural strength. α-Al 2 o 3 It is usually formed by the high-temperature phase transformation o...

Claims

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Application Information

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IPC IPC(8): C01F7/02B82Y40/00
Inventor 孟范成黄伟九杨惠杨有利刘丞田中青
Owner CHONGQING UNIV OF TECH
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