Porous material with central symmetry structure and method for preparing the same

A porous material and centrosymmetric technology, which is applied to home appliances, ceramic products, and other home appliances, can solve the problems of random distribution of pore structure and strength, and achieve the solution of random distribution of pore structure and low strength. The preparation method is simple and easy to operate. Good mechanical properties and stability

Active Publication Date: 2015-09-30
XIAN UNIV OF TECH
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide the preparation method of the above-mentioned porous material, whic

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
  • Porous material with central symmetry structure and method for preparing the same
  • Porous material with central symmetry structure and method for preparing the same
  • Porous material with central symmetry structure and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] The present invention also provides a method for preparing the above-mentioned porous material with a centrosymmetric structure, which includes the following steps:

[0032] Step 1. Weigh ceramic powder, water, dispersant and binder. The volume ratio of ceramic powder to water is 1:1.5~1:4. The mass of dispersant accounts for 2%~2% of the total mass of ceramic powder and water. 8%, the mass of the adhesive accounts for 1% to 4% of the total mass of the ceramic powder and water;

[0033] Step 2. Add dispersant and adhesive into water, mix well, then add ceramic powder, mix well to obtain raw material liquid; use zirconia ball or alumina ball as ball milling medium, ball mill in polyethylene ball mill bottle for 24 hours to make it uniform Disperse to obtain slurry;

[0034] Step 3: Inject the slurry into a cylindrical mold with heat transfer materials on both sides and bottom, and then place the mold on the freezing baffle of the freeze dryer and freeze for 2-4 hours at a free...

Example Embodiment

[0041] Example 1

[0042] Add 3.96g of sodium polyacrylate and 1.98g of carboxymethyl cellulose to 60g of distilled water, mix them evenly, and then add 138.40g of Al 2 O 3 Powder, Al 2 O 3 The volume ratio of powder and distilled water is 4:6, with zirconia balls as the ball milling medium, ball milled in a polyethylene ball mill bottle for 24 hours to make it uniformly dispersed, and obtain Al with a volume concentration of 40% 2 O 3 Slurry; will Al 2 O 3 The slurry is injected into a cylindrical mold with a copper side and bottom surface, a radius of 16mm, and a height of 48mm, and then inject Al 2 O 3 The bottom of the slurry mold is placed on a freezing partition at -30°C for freezing; Al 2 O 3 After the slurry is completely frozen, it is taken out and placed in an environment with a pressure of 0 Pa and dried at low pressure to obtain Al 2 O 3 Porous material preform; Al 2 O 3 The porous material preform is sintered at 1700°C under air atmosphere to obtain Al 2 O 3 Porous mate...

Example Embodiment

[0044] Example 2

[0045] Add 5.74g sodium methylene dinaphthalene sulfonate and 2.87g polyvinyl alcohol to 70g water successively, mix them evenly, then add 73.62g HA powder, the volume ratio of HA powder and distilled water is 3:7, with zirconia ball as the ball milling medium , Ball mill in a polyethylene ball mill bottle for 24 hours to make it uniformly dispersed to obtain a HA slurry with a volume concentration of 30%; inject the HA slurry into a cylindrical mold with silver on the side and bottom, a radius of 8mm and a height of 24mm, and then Place the bottom of the mold injected with HA slurry on a freezing baffle at -40°C for freezing; after the HA slurry is completely frozen, take it out, place it in an environment with a pressure of 600Pa and dry at low pressure to obtain a HA porous material preform; The preform is sintered at 1250°C in an air atmosphere to obtain HA porous material.

[0046] Each pore of the HA porous material points to the center and is evenly distr...

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 porous material with a central symmetry structure. Layered holes of the porous material are of a central symmetry oriented structure along the radial cross section. A method for preparing the porous material with the central symmetry structure comprises adding a dispersing agent and adhesives in water, adding ceramic powder after uniform mixing, using a zirconia ball or an alumina ball as a ball milling medium to perform ball milling, obtaining slurry with the volume concentration of 20%-40%; injecting the slurry in a cylindrical die with the side face and the bottom surface provided with a heat transfer material, placing the die on a freezing partition plate of a freezing dryer to freeze the slurry for 2-4 h, causing the freezing temperature to be -50 DEG C to -30 DEG C; completely freezing the slurry and then taking the slurry out of the die, placing the frozen slurry in the environment with the pressure of 0-600 Pa to perform low pressure drying for 20-24 h, so as to obtain a porous material prefabricated body; and finally sintering the porous material prefabricated body in the air or in the atmosphere of vacuum at 800-1700 DEG C for 2-3 h to obtain the porous material.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous materials, relates to a porous material with a centrosymmetric structure, and also relates to a preparation method of the porous material with a centrosymmetric structure. Background technique [0002] Porous material is a material with a network structure composed of interpenetrating or closed pores. Porous materials are generally used in gas and liquid filtration, purification and separation, catalyst carriers, advanced thermal insulation materials, biological Implantable materials, sound-absorbing and shock-absorbing materials and sensor materials and many other fields. At present, the methods for preparing porous materials mainly include organic foam impregnation, adding pore-forming agents, sol-gel methods, and freeze-drying methods. However, the porous materials prepared by most of the preparation methods have random and irregular porous structures, and the strength is not hi...

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): C04B38/00C22C1/08C04B35/10C04B35/447C04B35/48
Inventor 汤玉斐邱沙赵康吴聪
Owner XIAN UNIV OF TECH
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