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Preparation technology of synthesizing rod-like zirconium oxide powder through water-quenching method

A technology of zirconia powder and preparation process, applied in zirconia and other directions, can solve the problem of no report of rod-shaped zirconia powder, and achieve the effects of high efficiency, simple and safe operation

Active Publication Date: 2014-06-18
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there is no report on rod-shaped zirconia powder

Method used

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  • Preparation technology of synthesizing rod-like zirconium oxide powder through water-quenching method
  • Preparation technology of synthesizing rod-like zirconium oxide powder through water-quenching method

Examples

Experimental program
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Embodiment 1

[0013] Using water quenching method, using rod-shaped zirconium tetrachloride powder as raw material, the purity is greater than 99%, heating to 900 ° C for 1 h, water quenching, the water quenching solution is sodium hydroxide solution, the pH value of the water quenching solution is 10, The temperature of the water quenching solution is 0°C, and after water quenching, it is dried to obtain rod-shaped zirconia powder.

[0014] Through XRD test, it can be seen that the powder crystal type is monoclinic phase (see figure 1 ); through the SEM test, it can be seen that the zirconia powder is rod-shaped, with a diameter of about 10 μm and a length of about 200 μm (see figure 2 ).

Embodiment 2

[0016] Using water quenching method, using rod-shaped zirconium tetrachloride powder as raw material, the purity is greater than 99%, heating to 1100 ° C for 0.2h, water quenching, the water quenching solution is ammonia solution, the pH value of the water quenching solution is 8, water quenching The temperature of the solution is 30°C, quenched with water and then dried to obtain rod-shaped zirconia powder.

Embodiment 3

[0018] Using water quenching method, using rod-shaped zirconium tetrachloride powder as raw material, the purity is greater than 99%, heating to 1000 ° C for 0.5 h, water quenching, the water quenching solution is ammonia solution, the pH value of the water quenching solution is 9, water quenching The temperature of the solution is 20°C, quenched with water and then dried to obtain rod-shaped zirconia powder.

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Abstract

The invention provides a preparation technology of synthesizing rod-like zirconium oxide powder through a water-quenching method, and belongs to the technical field of powder material preparation. The preparation technology is characterized by comprising the following steps: heating rod-like zirconium tetrachloride powder with the purity of greater than 99% serving as a raw material to 900-1100 DEG C, carrying out heat preservation for 0.2-1 hour, and carrying out water quenching by adopting the water-quenching method, wherein a water quenching solution is a sodium hydroxide solution or an ammonia water solution, the pH value of the water quenching solution is 8-10, and the temperature of the water quenching solution is 0-30 DEG C; then drying, and thus obtaining the rod-like zirconium oxide powder. The preparation technology is simple, safe to operate and low in cost. The length-to-diameter ratio of the synthesized rod-like zirconium oxide powder is about 20 times.

Description

technical field [0001] The invention provides a preparation process for synthesizing rod-shaped zirconia powder by a water quenching method, which belongs to the technical field of powder material preparation. Background technique [0002] Due to its excellent properties of high temperature resistance, wear resistance and corrosion resistance, zirconia is widely used in the fields of refractory materials, ceramic pigments, electronic ceramics, functional ceramics and structural ceramics. In the studies that have been conducted, zirconia has been widely used in the toughening of oxide ceramics such as alumina, and non-oxide ceramics such as silicon nitride, silicon carbide, and zirconium boride, mainly due to the phase change characteristics of zirconia , when zirconia transforms from tetragonal phase to monoclinic phase, the volume expands by about 5%, and the microcracks and residual stress generated can improve the toughness of the material, so it can be used to toughen ce...

Claims

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Application Information

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IPC IPC(8): C01G25/02
Inventor 魏春城叶长收杨赞中
Owner SHANDONG UNIV OF TECH
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