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

Preparation method of forsterite-based foamed ceramic spherical shell for civil air defense engineering

An olivine-based and foamed ceramic technology is applied in the field of foamed ceramic spherical shells, which can solve the problems of low density and high strength of the foamed ceramic spherical shells, and achieve a controllable mechanical property at room temperature, simple operation, and controllable pore size. Effect

Inactive Publication Date: 2020-04-14
中国人民解放军军事科学院国防工程研究院工程防护研究所
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The parameter index corresponding to the national standard (GB / T 3994-2013) of the clay insulation refractory brick, which is also a foam ceramic material, shows that when the bulk density of the material is 0.8 g / cm 3 When the normal temperature static strength is 2.5MPa, there is a contradiction between the low density and high strength of the foamed ceramic material, which cannot meet the low density and high strength technical requirements of the foamed ceramic spherical shell of the civil air defense project.

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 method of forsterite-based foamed ceramic spherical shell for civil air defense engineering
  • Preparation method of forsterite-based foamed ceramic spherical shell for civil air defense engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1. Use 67~75wt% forsterite powder, 8~15wt% sericite powder, 8~13wt% silicon micropowder as raw materials, add 10~15wt% binder, 10~15wt% water and 8 ~15wt% pore-forming agent, mixed evenly to obtain mud;

[0032] Step 2: Fill the mud into a hemispherical shell mold with an outer diameter of 6-10 cm and an inner diameter of 3-5 cm, and press it at 5-7 MPa to form a hemispherical shell green body 1, and the middle part of the hemispherical shell green body 1 is a hollow hemisphere 3 , the cross-section of the hemispherical shell green body 1 is an annular structure 2;

[0033] Under the same pressure, the edges of the hemispherical shells are butted together to form a hollow sphere 4, and demolded. Curing at 25°C for 2-3 hours, and then drying at 60-80°C for 6-12 hours, to obtain the forsterite-based foam ceramic spherical shell body;

[0034] Step 3: Place the forsterite-based foam ceramic spherical shell body in an air atmosphere, raise the temperature to 800-900°...

Embodiment 2

[0037] A forsterite-based foam ceramic spherical shell used in civil defense projects and a preparation method thereof. The present embodiment except step 3, all the other are the same as embodiment 1:

[0038] Step 3. Place the forsterite-based foam ceramic spherical shell body in an air atmosphere, raise the temperature to 900-1000°C at 1-3°C / min and keep it warm for 1-2h, and cool to room temperature to obtain the forsterite-based Foam ceramic spherical shell.

[0039] The pore-forming agent is starch; the binding agent is water glass. The bulk density of the obtained forsterite-based ceramic foam spherical shell matrix material is 1.2~1.7g / cm 3 , The normal temperature compressive strength is 10~15MPa.

Embodiment 3

[0041] Step 1. Use 75~80wt% forsterite powder, 8~15wt% sericite powder, 5~8wt% silicon micropowder as raw materials, add 10~15wt% binder, 15~20wt% water and 8 ~15wt% pore-forming agent, mixed evenly to obtain mud;

[0042] Step 2. Fill the mud into a hemispherical shell mold with an outer diameter of 6-10cm and an inner diameter of 3-5cm, press it at 7-8Mpa to form a hemispherical shell green body, and join the edges of the hemispherical shell under the same pressure to form a mold. A hollow sphere, unmoulded. Curing at 25°C for 3-4 hours, and then drying at 80-100°C for 6-12 hours, to obtain the forsterite-based foam ceramic spherical shell body;

[0043] Step 3: Place the forsterite-based foam ceramic spherical shell body in an air atmosphere, raise the temperature to 800-900°C at 3-7°C / min and keep it warm for 1-2h, and cool to room temperature to obtain the forsterite-based Foam ceramic spherical shell.

[0044] The pore-forming agent is carbon powder; the binding agent...

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a forsterite-based foamed ceramic spherical shell for civil air defense engineering. According to the technical scheme, the preparation method comprises the following steps: uniformly mixing 67-85 wt% of forsterite powder, 5-10 wt% of sericite powder, 3-13 wt% of silicon micro-powder, 10-15 wt% of a binding agent, 10-30 wt% of water and 8-15 wt% ofa pore-forming agent to obtain a mud material; filling a hemispherical shell mold with an outer diameter of 6-10 cm and an inner diameter of 3-5 cm with the mud material, pressing into a hemisphericalshell billet under 5-10 Mpa, butting and combining the edge openings of the hemispherical shells into a hollow sphere under the same pressure, and demolding; and curing at 25 DEG C for 2-5 hours, then drying at 60-110 DEG C for 6-12 hours, then putting in an air atmosphere, heating to 800-1000 DEG C at a speed of 1-10 DEG C / min, keeping the temperature for 1-2 hours, and sintering and sealing toobtain the forsterite-based foamed ceramic spherical shell. According to the invention, the raw materials used in the method are cheap and easy to obtain, the sintering temperature is low, the production efficiency is high, and automatic production can be achieved; and the forsterite-based foamed ceramic spherical shell prepared through the method is uniform in wall thickness, high in strength andcontrollable in density, wall thickness and sphere size.

Description

technical field [0001] The invention belongs to the technical field of foam ceramic spherical shells. In particular, it relates to a method for preparing a forsterite-based foam ceramic spherical shell used in civil air defense projects. Background technique [0002] The foamed ceramic spherical shell has the dual characteristics of efficient clipping and energy absorption of porous materials and high structural strength of the shell. It not only has a strong attenuation effect on the explosion wave, but also has the ability to withstand multiple blows. The diffraction and isolation effects of force waves enhance the dispersion and attenuation effects of materials on waves while maintaining strength, so they have broad application space in the fields of impact dynamics and civil air defense engineering. [0003] Cao Yan et al. (Zeng Yan, Sang Yuanhua, Liao Qilong, etc. prepared millimeter-scale translucent Al 2 o 3 Hollow ball [J]. Journal of Chinese Ceramic Society, 201...

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 Applications(China)
IPC IPC(8): C04B35/20C04B38/06
CPCC04B35/20C04B38/0645C04B38/067C04B38/068C04B2235/3222C04B2235/3418C04B2235/3427C04B2235/3472C04B2235/422C04B2235/6562C04B2235/77C04B2235/94C04B2235/95C04B2235/96C04B38/0067
Inventor 魏久淇邓承继王世合张春晓曹少华
Owner 中国人民解放军军事科学院国防工程研究院工程防护研究所
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