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

Method for preparing sintering-free geopolymer foam ceramics

A foamed ceramic and geopolymer technology is applied in the field of preparation of sinter-free geopolymer foamed ceramic thermal insulation materials, which can solve the problems of potential safety hazards, poor fire resistance, fire, etc., and achieve comprehensive utilization, long service life, Good fire resistance

Inactive Publication Date: 2014-03-19
NANJING UNIV
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic foam insulation material has the advantages of light weight and good insulation effect, but because it is an organic component, it has low strength, is easy to age, is easy to burn, has poor fire resistance, can cause fire, and has potential safety hazards. Good thermal insulation material is imperative

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 example

[0016] This implementation case includes the following steps:

[0017] (1) Wash and dry ordinary waste ceramics and grind them in a ball mill for 20-30 minutes. The finely ground waste ceramics powder can pass through a 100-mesh sieve;

[0018] (2) Add 100 parts by weight of waste ceramic powder, 55 parts by weight of sodium silicate with a modulus of 1.2 as an alkali activator, and 1.5 parts by weight of aluminum powder foaming agent into a concrete mixing pot and stir evenly;

[0019] (3) Pour the uniformly stirred slurry into the mold, then put it in a concrete curing box at 60±5°C and a relative humidity of 99% for curing, and demould after 24 hours. Then put into the curing box and maintain until 28 days to obtain foam ceramics;

[0020] (4) After curing for 28 days, the density of the prepared ceramic foam was measured to be 436kg / m 3 , compressive strength 14.37MPa, flexural strength 2.9Mpa, thermal conductivity 0.15w / (m·k).

example 2

[0022] This implementation case includes the following steps:

[0023] (1) Wash and dry ordinary waste ceramics and grind them in a ball mill for 20-30 minutes. The finely ground waste ceramics powder can pass through a 100-mesh sieve;

[0024] (2) Add 100 parts by weight of waste ceramic powder, 60 parts by weight of potassium silicate with a modulus of 2.0 as an alkali activator, and 2 parts by weight of aluminum powder foaming agent into a concrete mixing pot and stir evenly;

[0025] (3) Pour the uniformly stirred slurry into the mold, then put it in a concrete curing box at 60±5°C and a relative humidity of 99% for curing, and demould after 24 hours. Then put it into the curing box and maintain it to 28 days to get foam ceramics.

[0026] (4) After curing for 28 days, the density of the prepared ceramic foam was measured to be 462kg / m 3 , compressive strength 12.37MPa, flexural strength 3.36MPa, thermal conductivity 0.16w / (m·k).

example 3

[0028] This implementation case includes the following steps:

[0029] (1) Wash and dry ordinary waste ceramics and grind them in a ball mill for 20-30 minutes. The finely ground waste ceramics powder can pass through a 100-mesh sieve;

[0030] (2) Add 100 parts by weight of waste ceramic powder, 50 parts by weight of alkali activator 10mol / L sodium hydroxide solution, and 4 parts by weight of hydrogen peroxide foaming agent into a concrete mixing pot and stir evenly;

[0031] (3) Pour the uniformly stirred slurry into the mold, then put it in a concrete curing box at 60±5°C and a relative humidity of 99% for curing, and demould after 24 hours. Then put it into the curing box and maintain it to 28 days to get foam ceramics.

[0032] (4) After curing for 28 days, the density of the prepared ceramic foam was measured to be 243kg / m 3 , compressive strength 8.67MPa, flexural strength 1.30MPa, thermal conductivity 0.05w / (m·k).

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
Densityaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing sintering-free geopolymer foam ceramics. The method comprises the steps of firstly grinding waste / old ceramics into powder, then, uniformly mixing and stirring 100 parts by weight of ceramic powder, 30-60 parts by weight of alkaline activator and 1-5 parts by weight of foamer, pouring a mixture into a mold, curing for 24 hours in a concrete curing box at the temperature of 60 DEG C, then, demolding, and continuously curing for 28 days, thereby obtaining the sintering-free geopolymer foam ceramics. According to the method disclosed by the invention, a high-temperature (1,300 DEG C) and high-energy-consumption sintering process of the general ceramic foam preparation processes is not required, and complicated processes, such as dipping and the like, are also not required, so that the method is energy-saving, low-carbon and environmental-friendly; the geopolymer foam ceramics are prepared by adopting an alkali activating principle, and the interior of the geopolymer foam ceramics contains a great deal of amorphous three-dimensional reticular structures, so that the material has the characteristics of low heat conductivity, good heat insulating property, good fire resistance, long service life, good ageing resistance and the like; the material is an inorganic material, so that the fatal defects of flammability and combustibility of organic heat insulating materials are overcome.

Description

technical field [0001] The invention relates to building exterior wall insulation materials, in particular to a preparation method of a non-sintering-free polymer foam ceramic insulation material, which is a technology of grinding recycled waste ceramics into powder and then using an alkali excitation method to prepare foam ceramics. Background technique [0002] The current building exterior wall insulation materials are mainly organic materials, namely polystyrene foam insulation boards, polyurethane foam insulation boards, etc. Organic foam insulation material has the advantages of light weight and good insulation effect, but because it is an organic component, it has low strength, is easy to age, is easy to burn, has poor fire resistance, can cause fire, and has potential safety hazards. Good thermal insulation material is imperative. The development of foam ceramics began in the 1970s and is a porous material with high temperature resistance. Due to the stable physica...

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): C04B38/02
Inventor 李琴徐燕崔皓安浩邓晔文翟建平
Owner NANJING UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com