Preparation process of novel transparent ceramic with high light transmittance

A technology of transparent ceramics and preparation technology, which is applied in the field of ceramic preparation, can solve the problems that micropores cannot be eliminated, restrict the development and production application of transparent ceramics, and the transparency of ceramics cannot be significantly improved, so as to promote material migration and grain boundary movement, reduce Generation of impurities and pores, effects of improving transparency and strength properties

Inactive Publication Date: 2020-07-17
李多芹
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing transparent ceramic preparation process can achieve extremely low impurities that do not affect the transmittance, but there are still defects in the elimination of pores. There are often many micropores in the fin

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation process of novel transparent ceramic with high light transmittance
  • Preparation process of novel transparent ceramic with high light transmittance
  • Preparation process of novel transparent ceramic with high light transmittance

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1:

[0041] See Figure 1-2 , A process for preparing a new type of transparent ceramic with high light transmission, including the following steps:

[0042] S1. Take the nano alumina powder, additives and deionized water and mix them evenly and put them into the ball mill for 4 hours, during which time the defoamer and the binder are added, and the water-based mixed slurry is obtained after the ball milling is finished;

[0043] S2. A crucible made of alumina is used to hold the water-based mixed slurry and place it in an oven, dry it at a temperature of 80°C, take it out, smash and sieve to separate large-particle bulk powder;

[0044] S3. Take the sieved powder for granulation and tableting, apply cold isostatic pressing above 200 MPa to a green body, and degrease the green body;

[0045] S4. Put the green body into an atmosphere sintering furnace with a double-extension deporation device, sinter at 1800°C in a hydrogen atmosphere, and cool down after 2 hours. The sint...

Example Embodiment

[0054] Example 2:

[0055] See Figure 1-2 , A process for preparing a new type of transparent ceramic with high light transmission, including the following steps:

[0056] S1. Take nano-alumina powder, additives and deionized water and mix them evenly and put them into the ball mill for 8 hours, during which time the defoamer and binder are added, and the water-based mixed slurry is obtained after the ball milling is finished;

[0057] S2. A crucible made of alumina is used to hold the water-based mixed slurry and place it in an oven, dry it at a temperature of 100°C, take it out, smash and sieve to separate large-particle bulk powder;

[0058] S3. Take the sieved powder for granulation and tableting, apply cold isostatic pressing above 200 MPa to a green body, and degrease the green body;

[0059] S4. Put the green body into an atmosphere sintering furnace with a double-extension deporation device, sintering at 1900℃ under a hydrogen atmosphere, cooling for 12 hours, the sintering tem...

Example Embodiment

[0064] Example 3:

[0065] See Figure 1-2 , A process for preparing a new type of transparent ceramic with high light transmission, including the following steps:

[0066] S1. Take the nano alumina powder, additives and deionized water and mix them evenly and put them into the ball mill for 12 hours, during which time the defoamer and the binder are put in, and after the ball milling, the water-based mixed slurry is obtained;

[0067] S2. A crucible made of alumina is used to hold the water-based mixed slurry and place it in an oven, dry it at a temperature of 120°C, take it out, smash and sieve to separate large-particle bulk powder;

[0068] S3. Take the sieved powder for granulation and tableting, apply cold isostatic pressing above 200 MPa to a green body, and degrease the green body;

[0069] S4. Put the green body into an atmosphere sintering furnace with a double-extension de-hole device, sinter at 2000°C in a hydrogen atmosphere, and cool down after 24 hours. The sintering temp...

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 discloses a preparation process of novel transparent ceramic with high light transmittance, and belongs to the technical field of ceramic preparation; nano aluminum oxide powder can be adopted; the purity and the fineness of the ceramic are improved; particle distribution is quite uniform, a double-extension hole eliminating device is innovatively introduced in the green body sintering process; a hydrogen atmosphere mixed with nano aluminum oxide powder is introduced; the characteristics of small hydrogen atom radius and high diffusion rate are utilized; pores in the green body can be quickly discharged through the entrained nanometer aluminum oxide powder; meanwhile, gas extrusion can be accelerated and filling and repairing can be carried out by utilizing the nano aluminumoxide powder which is temporarily soaked with a binding agent, and the crystal density of ceramic sintering is improved; and the double-extension pore eliminating device is arranged on the airflow impact near the surface of the green body, so that on one hand, pore elimination can be accelerated, on the other hand, the stress structure of the green body can be improved by utilizing the micro-impact effect, and substance migration and grain boundary movement are promoted, so that the transparency and the strength performance of the ceramic are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, and more specifically relates to a preparation process of a novel transparent ceramic with high light transmission. Background technique [0002] Transparent ceramics refer to polycrystalline materials with certain light transmittance prepared by ceramic technology. Transparent ceramics not only have the inherent high strength, high hardness, high temperature resistance, corrosion resistance, excellent chemical stability and other properties of ceramics, but also have the optical properties of glass and excellent dielectric properties, low electrical conductivity, high thermal conductivity, etc. The unparalleled performance of other materials, so it can be widely used in high-tech fields such as lighting technology, laser technology, special instrument manufacturing, high temperature technology, wireless electronics, information detection technology and military industry. Transparent ...

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): C04B35/10C04B35/622C04B35/638
CPCC04B35/10C04B35/622C04B35/638C04B2235/3206C04B2235/3232C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/9646
Inventor 不公告发明人
Owner 李多芹
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap