Preparation method of colorized zirconia-structured ceramic

A zirconia and ceramic technology, applied in the field of preparation of colored zirconia structural ceramics, can solve the problems of uneven color, high requirements on equipment and production conditions, and volatile pollution.

Inactive Publication Date: 2012-10-03
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: uneven color, poor repeatability, easy to cause volatile pollution when sintering at high temperature (1300-1550°C), energy consumption and increase of preparation cost
[0006] The invention...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] ZrOCl 2 ·8H 2 O, Y (NO 3 ) 3 solution and erbium nitrate solution (Er 2 o 3 , Y 2 o 3 , ZrO 2 The mass ratio is: 5:5:90) mixed and prepared into a 0.5mol / L solution, and titrated by chemical co-precipitation method to prepare ceramic powder. The temperature of the water bath is controlled to be 95°C, the stirring speed is 300r / min, the pH value in the reactor is 2.5, and 1.5g ammonium citrate (ZrO 2 7% of the mass) as a dispersant to control the reaction titration rate of the liquid.

[0015] After the reaction is complete, add 1000ml of deionized water and stir for 2 hours, age for 24 hours, remove the precipitated supernatant, add 1000ml of deionized water, age, then remove the precipitated supernatant, and repeat this process 4 times. Then the reactor is subjected to low-frequency ultrasonic vibration, and then aged. Finally, take a small amount of supernatant to titrate AgNO 3 As long as no white precipitate is formed in the solution, the precipitate is ...

Embodiment 2

[0021] ZrOCl 2 ·8H 2 O, Y (NO 3 ) 3 solution and neodymium nitrate solution (Nd 2 o 3 , Y 2 o 3 , ZrO 2 The mass ratio is: 5:5:90) mixed and prepared into a 0.5mol / L solution, and titrated by chemical co-precipitation method to prepare ceramic powder. The temperature of the water bath is controlled to be 95°C, the stirring speed is 300r / min, the pH value in the reactor is 2.5, and 1.5g ammonium citrate (ZrO 2 7% of the mass) as a dispersant to control the reaction titration rate of the liquid.

[0022] After the reaction is complete, add 1000ml of deionized water and stir for 2 hours, age for 24 hours, remove the precipitated supernatant, add 1000ml of deionized water, age, then remove the precipitated supernatant, and repeat this process 4 times. Then the reactor is subjected to low-frequency ultrasonic vibration, and then aged. Finally, take a small amount of supernatant to titrate AgNO 3 As long as no white precipitate is formed in the solution, the precipitate ...

Embodiment 3

[0028] ZrOCl 2 ·8H 2 O, Y (NO 3 ) 3 solution and praseodymium nitrate solution (Pr 6 o 11 , Y 2 o 3 , ZrO 2 The mass ratio is: 5:5:90) mixed and prepared into a 0.5mol / L solution, and titrated by chemical co-precipitation method to prepare ceramic powder. The temperature of the water bath is controlled to be 95°C, the stirring speed is 300r / min, the pH value in the reactor is 2.5, and 1.5g ammonium citrate (ZrO 2 7% of the mass) as a dispersant to control the reaction titration rate of the liquid.

[0029] After the reaction is complete, add 1000ml of deionized water and stir for 2 hours, age for 24 hours, remove the precipitated supernatant, add 1000ml of deionized water, age, then remove the precipitated supernatant, and repeat this process 4 times. Then the reactor is subjected to low-frequency ultrasonic vibration, and then aged. Finally, take a small amount of supernatant to titrate AgNO 3 As long as no white precipitate is formed in the solution, the precipit...

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Abstract

The invention discloses a preparation method of colorized zirconia-structured ceramic. The zirconia ceramic material doped only with a stabilizer is white or light yellow. With the adoption of the method of doping other rare oxides, the zirconia ceramic in various colours is made; therefore, the application of zirconia ceramic material to the fields with appearance requirement such as clocks and watches, ornaments and crafts is widen by utilization of excellent mechanical property and coloured appearance of the zirconia ceramic material doped with the other rare oxides. The method provided by the invention comprises the steps of mixing the colorant-containing yttrium-zirconium ceramic mixed powder with adhesives, performing CIM (computer integrated manufacturing) injection moulding, thermally pressing in vacuum and sintering, and obtaining the colorized zirconia-structured ceramic.

Description

[0001] technical field [0002] The invention belongs to the field of preparation of rare earth-doped structural ceramic materials, and in particular relates to a preparation method of colored zirconia structural ceramics. Background technique [0003] Adding rare earth yttrium as a phase stabilizer, the zirconia structural ceramic material is toughened by phase transformation. It has: high hardness, high strength, high room temperature compressive strength, high bending strength, good toughness, good chemical stability, strong corrosion resistance, etc. Therefore, phase change toughened zirconia structural ceramics are widely used in ball milling media, mechanical cutting tools, catering knives, micro motor bearing balls, optical fiber sleeves, watch cases, fitness balls, bioceramics and other fields, known as The most promising advanced structural ceramic materials. [0004] The color of zirconia ceramic materials mixed only with stabilizers is white or light yellow, and ...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 杨斌张骞吴珊李明茂
Owner JIANGXI UNIV OF SCI & TECH
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