Method for preparing light nano porous ceramics

A technology of nano-micropores and ceramics, applied in the direction of nano-structure manufacturing, nano-technology, nano-technology, etc., to achieve the effects of environmental purification, high porosity, and good sound-absorbing performance

Inactive Publication Date: 2012-10-03
NANJING UNIV OF SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, the preparation technology of porous ceramics has made great progress, but there are still some problems to be solved, such as the reduction of manufacturing costs and the precise control of the size of the pores , the relationship between porosity and strength, the toxicity of gel injection molding, etc.
From the perspective of the current preparation of porous ceramics, a single preparation technology often cannot meet the current performance index requirements

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
  • Method for preparing light nano porous ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In a volume of 1M 3 Inject 0.4M into the cartridge 3 Water is used as protection and cooling medium, with 7 parts of explosives (TNT / RDX mass ratio is 70 / 30), 40 parts of aluminum oxide content is 19%, the waste ceramics that silicon oxide content is 74%, 30 parts of waste sludge, and 23 parts The clay is crushed and mixed, packaged with a 8# detonator in a plastic bag and suspended in the cylinder, ignited and detonated, and the product after the explosion is collected and passed through a 100-mesh sieve to remove impurities such as metal wires and tape fragments, and heated in a single phase at 850 °C Pressing and sintering to obtain a density of 0.44kg / m 3 , The porosity is 65%, the nano-microporous ceramics with a pore size of 600nm, and the compressive strength is 8.2MPa.

Embodiment 2

[0032] In a volume of 2M 3 Inject 0.8M into the cartridge 3 Water is used as protection and cooling medium, with 15 parts of explosives (TNT / RDX mass ratio is 30 / 70), 25 parts of waste slag with alumina content of 15% and silicon oxide content of 70%, 30 parts of waste sludge, 20 parts of kaolin , 10 parts of clay were crushed and mixed, packaged with a 8# detonator in a plastic bag and suspended in the cylinder, ignited and detonated, and the products after the explosion were collected and passed through a 100-mesh sieve to remove impurities such as metal wires and tape fragments, and placed at 950 ° C Single-phase hot pressing sintering to obtain a density of 0.32kg / m 3 , Nano-microporous ceramics with a pore size of 20nm, and a compressive strength of 3.4MPa.

Embodiment 3

[0034] In a volume of 10M 3 Inject 4M into the cartridge 3 Water is used as protection and cooling medium, with 1 part of explosive (TNT / RDX mass ratio is 50 / 50), 50 parts of aluminum oxide content is 16%, silicon oxide content is the waste ceramics of 66%, 25 parts of waste slag, 24 parts of long Crushed and mixed with stones, sealed with a plastic bag of 8# detonator and suspended in the barrel, ignited and detonated, collected and passed through a 100-mesh sieve to remove impurities such as metal wires and tape fragments. Heat in single phase at 1150 °C Pressing and sintering to obtain a density of 0.60kg / m 3 , Nano-microporous ceramics with a pore size of 150nm, and a compressive strength of 15.0MPa.

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

PropertyMeasurementUnit
porosityaaaaaaaaaa
pore sizeaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing light nano porous ceramics, which comprises: mixing raw materials, primary minerals and explosive, filling the mixed materials in a closed detonation container, placing a detonator, and sealing the materials and the detonator by a waterproof material; filling water into the closed detonation container as pressure-keeping and cooling medium; priming the detonator and collecting detonation products, and sieving the collected products; and performing single-phase hot pressed sintering of the sieved products. In the invention, the nano powder prepared from nano ceramics is obtained by impacting the crushed raw materials with the huge energy provided by detonation reaction instantly, the energy consumption is extremely low, and the reaction time is extremely short. The method has a great significance for improving production efficiency and improving benefits.

Description

technical field [0001] The invention belongs to the interdisciplinary field of nanometer materials and structural ceramic materials, in particular to a preparation method of lightweight nanometer microporous ceramics. Background technique [0002] Cahn, a famous British material scientist, wrote in the journal Nature that nano-ceramic is a strategic way to solve the brittleness of ceramics. Nano-ceramic refers to the ceramic material in the microstructure, the grains, grain boundaries and the combination between them are at the nano-scale level. Due to the refinement of nano-ceramic grains, the number of grain boundaries increases greatly, which can make the material The strength, toughness and superplasticity are greatly improved, which has an important impact on the mechanical, electrical, optical, thermal, magnetic and other properties of the material. At present, there are mainly the following methods for preparing nanopowder of nanoceramics: 1. Liquid treatment, such ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622B82B3/00C04B33/132C04B33/32C04B35/64
CPCY02P40/60
Inventor 石晓琴陈光崔崇赖建中张士华彭东文邹友生丁锡峰江金国王雄
Owner NANJING UNIV OF SCI & 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