Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fused silica ceramic material containing holmium oxide and preparation method thereof

A technology of fused silica and ceramic materials, applied in the field of high temperature structural ceramics

Inactive Publication Date: 2010-07-07
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this regard, there are no research reports abroad

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The raw materials used in the fused silica ceramic material containing holmium oxide and the weight percentage of the raw materials are: 97.5% of fused silica fine powder <0.043mm, and 2.5% of holmium oxide fine powder <0.030mm. The fused silica fine powder and the holmium oxide fine powder are measured according to the proportion and then dry-mixed for 2 minutes, then gradually add 7% of polyvinyl alcohol solution with a mass concentration of 2% (percentage by weight, added) under constant stirring, and continue to stir and mix for 3 Pass through a 40-mesh sieve after 1 minute, continue to stir for 1 minute after sieving, and place the material in a sealed plastic bag to trap the material. After 4 hours of trapping the material, obtain a blank that can be used for pressure molding. The blank is formed by a hydraulic press, and the forming pressure of the blank is 100MPa. The molded green body was dried at room temperature of 20°C for 4 hours, then dried at 70°C for 1 h...

Embodiment 2

[0020] The raw materials used in the fused silica ceramic material containing holmium oxide and the weight percentage of the raw materials are: 98.5% of fused silica fine powder <0.043mm, and 1.5% of holmium oxide fine powder <0.030mm. The fused silica fine powder and the holmium oxide fine powder are measured according to the proportion and then dry-mixed for 2 minutes, then gradually add 7% of polyvinyl alcohol solution with a mass concentration of 2% (percentage by weight, added) under constant stirring, and continue to stir and mix for 3 Pass through a 40-mesh sieve after 1 minute, continue to stir for 1 minute after sieving, and place the material in a sealed plastic bag to trap the material. After 4 hours of trapping the material, obtain a blank that can be used for pressure molding. The blank is formed by a hydraulic press, and the forming pressure of the blank is 100MPa. The molded green body was dried at room temperature of 20°C for 4 hours, then dried at 70°C for 1 h...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a fused silica ceramic material containing holmium oxide and a preparation method thereof, belonging to the field of high-temperature structural ceramic materials. The ceramic material is prepared from the following materials by weight percentage: 97% to 99% of fine fused silica powder and 1% to 3% of fine holmium oxide powder. The preparation method comprises the following steps: dry-mixing the fine fused silica powder and the fine holmium oxide powder; wet-mixing the mixture by adding polyvinyl alcohol solution as binding agent; further sieving, stirring and ageing the mixture to obtain the perform body for molding the green body; molding the green body by a hydraulic press with the molding pressure being higher than or equal to 50MPa; drying and sintering the green body at 1,200 to 1,400 DEG C; and standing for 1 to 3 hours to obtain the fused silica ceramic material containing holmium oxide. The invention provides a novel high-temperature structural material for glass melting, ferrous and non-ferrous metallurgy, electronics, military missiles, spacecraft and other fields in China and has wide application prospect and great significance in strengthening the national defense.

Description

technical field [0001] The invention belongs to the field of high-temperature structural ceramics, and in particular relates to a fused quartz ceramic material containing holmium oxide and a preparation method thereof. Background technique [0002] Fused silica is a glassy SiO 2 It is a substance with high temperature resistance (1000°C), low thermal expansion coefficient (0.5×10-6 / °C) and other characteristics. Fused silica can be used as raw material to prepare directly molded fused silica products and fused silica ceramic materials. [0003] Fused quartz ceramic material is made of fused silica glass fragments as raw material, which is sintered after grinding, pulping, casting, or sintering; or it is made by grinding, pressure forming and sintering. Fused silica ceramic materials prepared from fused silica are less harmful to crystallization than direct molding fused silica products, can be used in high temperature environments above 1000°C, and have excellent thermal s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/14C04B35/622
Inventor 王志发卜景龙马飞贾翠王瑞生王榕林陈思思
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com