Preparation method of nano grade zirconium oxide crude powder

A zirconia and nano-scale technology, which is applied in the field of preparation of nano-scale zirconia raw powder, can solve the problems of unavoidable water influence, small specific surface area and large particle size of nano-powder, and achieve small particle size and particle size distribution Narrow, large specific surface area effect

Inactive Publication Date: 2005-03-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the impact of water on nanoparticles cannot be avoided in the prior art, and the

Method used

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  • Preparation method of nano grade zirconium oxide crude powder
  • Preparation method of nano grade zirconium oxide crude powder
  • Preparation method of nano grade zirconium oxide crude powder

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] [Example 1]

[0020] At room temperature, in a 500ml three-necked flask, add 200ml of 0.5mol / L ZrOCl 2 Solution, under the condition of rapid stirring, add 0.5 mol / L ammonia water as the precipitating agent, control the final pH value of 9.5, and prepare ZrO 2 Hydrogels. After washing, fully exchange the water with ethanol to make ZrO 2 Alcohol gel. Transfer the alcogel into an autoclave, add an appropriate amount of ethanol as a drying medium, seal the autoclave, slowly raise the temperature to 260°C, and keep it for 1 hour to release the fluid. Use N 2 Fill the reactor to drive off the remaining fluid, and after cooling to room temperature, milky white translucent nano-scale ZrO is obtained 2 Original powder. In a muffle furnace, calcined at 650°C for 4 hours to investigate the thermal stability of the nanoparticles at high temperatures.

Example Embodiment

[0023] [Example 2]

[0024] The reaction steps and operating methods are the same as in Example 1, except that ZrO(NO 3 ) 2 Solution instead of ZrOCl 2 Solution.

Example Embodiment

[0025] [Example 3]

[0026] The reaction steps and operation methods are the same as in Example 1, except that Na is used 2 CO 3 As a precipitant.

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Abstract

A process for preparing zirconium oxide nanoparticles includes such steps as using alkali solution as precipitant to precipitate Zr salt to obtain the aqueous gel of zirconium oxide and supercritical drying by low-grade emtrol.

Description

technical field [0001] The invention relates to a method for preparing nano-sized zirconia raw powder, in particular to a method for preparing nano-sized zirconia raw powder by using alcohol solution as a drying medium. Background technique [0002] In recent years, the preparation of nanometer-sized ultrafine particles of inorganic materials has attracted much attention from materials and catalysis scientists. Nanoscale ZrO 2 Because it is a material with high hardness and good toughness, it is widely used in the preparation of various functional ceramic components, such as oxygen sensors, piezoelectric ceramics, pyroelectric ceramics, transparent ferroelectric ceramics and a variety of toughened structural ceramic products, such as Ceramic knives, tools, molds, ceramic valves and advanced ceramic engine parts are the most important raw materials for high-performance special ceramic products. Nanoscale ZrO 2 With the far-infrared emission...

Claims

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Application Information

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IPC IPC(8): C01B25/02
Inventor 缪长喜张惠明谢在库陈庆龄
Owner CHINA PETROLEUM & CHEM CORP
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