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Preparation method of fused quartz ceramic material containing nanoscale ytterbium oxide

A technology of fused silica and ceramic materials, applied in the field of high-temperature structural ceramics, can solve problems such as no research reports

Inactive Publication Date: 2015-02-11
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoscale ytterbium oxide is introduced into fused silica ceramic material, under the firing condition of 1400°C for 1 hour, research on nanoscale ytterbium oxide inhibits or reduces the crystallization degree of fused silica has not been seen so far. research report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw materials used for the fused silica ceramic material containing nano-scale ytterbium oxide and the weight percentage of the raw materials are: 98% of fused silica powder <0.043mm, and 2% of nano-scale ytterbium oxide <100nm. Mix fused silica powder and nano-scale ytterbium oxide according to the ratio, add appropriate amount of water and stir to form a fluid slurry, continue to stir the slurry for 5 minutes, then dehydrate and dry to obtain a mixed dry powder, and then gradually add it to the mixed dry powder Add 7% (percentage by weight, additional) of polyvinyl alcohol solution binding agent of mass concentration 2%, continue stirring and mixing for 3 minutes and pass through a 40-mesh sieve, continue to stir after sieving for 2 minutes, and place the material in a sealed plastic bag. After 4 hours, a blank that can be press-formed for the sample is obtained. The blank is formed by a hydraulic press, and the forming pressure of the blank is 100MPa. The molded...

Embodiment 2

[0022] The raw materials used for the fused silica ceramic material containing nano-scale ytterbium oxide and the weight percentage of the raw materials are: 97% of fused silica powder <0.043mm, and 3% of nano-scale ytterbium oxide <100nm. Mix fused silica powder and nano-scale ytterbium oxide according to the ratio, add appropriate amount of water and stir to form a fluid slurry, continue to stir the slurry for 5 minutes, then dehydrate and dry to obtain a mixed dry powder, and then gradually add it to the mixed dry powder Add 7% (percentage by weight, additional) of polyvinyl alcohol solution binding agent of mass concentration 2%, continue stirring and mixing for 3 minutes and pass through a 40-mesh sieve, continue to stir after sieving for 2 minutes, and place the material in a sealed plastic bag. After 4 hours, a blank that can be press-formed for the sample is obtained. The blank is formed by a hydraulic press, and the forming pressure of the blank is 100MPa. The molded...

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PUM

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Abstract

The invention relates to a preparation method of a fused quartz ceramic material containing nanoscale ytterbium oxide, and belongs to the field of ceramic materials with high-temperature structures. The ceramic material is made of raw materials in percentage by weight as follows: 97%-99% of fused quartz powder and 1%-3% of the nanoscale ytterbium oxide. The preparation method includes the steps as follows: mixing the fused quartz powder and the nanoscale ytterbium oxide, adding an appropriate amount of water into the mixture, and stirring the mixture into slurry; dewatering and drying the slurry, and adding a polyvinyl alcohol solution into the slurry for wet mixing; screening, stirring, ageing, forming and drying the slurry to obtain a blank body; and sintering the blank body at the temperature ranging from 1300 DEG C to 1400 DEG C for 1-3 hours to obtain the fused quartz ceramic material containing the nanoscale ytterbium oxide. Compared with a fused quartz ceramic material containing micron-size ytterbium oxide, the material is low in thermal expansivity and high in safety and reliability, is a novel high-temperature structure material for fields of glass smelting, steel and nonferrous metallurgy, electronics, war industry missile, spacecraft and the like, and has a wide application prospect and significance in strengthening national defense.

Description

technical field [0001] The invention belongs to the field of high-temperature structural ceramics, and in particular relates to a preparation method of a fused silica ceramic material containing nanoscale ytterbium oxide. Background technique [0002] Fused quartz has excellent characteristics such as low thermal expansion, and its thermal expansion rate at 800 ° C is only 0.05%. The fused silica ceramic material prepared from fused silica particles has excellent thermal shock resistance and is widely used in glass melting, steel and nonferrous metals. Metallurgy, electric power, electronics, military missiles, spacecraft and other fields. However, the granular fused silica in the fused silica ceramic material is a thermodynamically unstable high-energy state substance. Under the high temperature condition of >1200°C, the fused silica is easy to gradually devitrify (or crystallize) to form a high thermal expansion rate (or high thermal expansion rate). coefficient) of cr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/63C04B35/622
Inventor 卜景龙谷莹蕾马飞陈越军王志发
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY