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

Honeycomb-shaped silicon carbide ceramic carrier, and preparation method and application thereof

A technology of silicon carbide ceramics and the first silicon carbide powder, which is applied in the direction of ceramic products, catalyst carriers, chemical instruments and methods, etc., can solve the problems of small water absorption performance of silicon carbide, low porosity, and less catalytic tail gas, etc., and achieve increased Water absorption performance, good water absorption performance, beneficial to the load effect

Active Publication Date: 2017-05-10
CHINA BUILDING MATERIALS ACAD
View PDF5 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(5) Larger specific surface area: The size of the specific surface area determines its catalytic efficiency. The larger the specific surface area, the higher the catalytic efficiency per unit time. On the contrary, the lower the specific surface area, the less exhaust gas is catalyzed per unit time. The conversion rate lower
(6) Does not contain substances that poison the catalyst: if it contains substances that poison the catalyst, it will lead to a decrease in the catalytic activity of the metal catalyst and a decrease in the conversion rate of CO
[0006] In the preparation process of the existing honeycomb silicon carbide ceramic carrier, due to the small water absorption performance of silicon carbide, it is not conducive to the subsequent extrusion step, so that the surface of the prepared ceramic carrier is rough, and the porosity is low, which is not conducive to the subsequent active group. min load

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
  • Honeycomb-shaped silicon carbide ceramic carrier, and preparation method and application thereof
  • Honeycomb-shaped silicon carbide ceramic carrier, and preparation method and application thereof
  • Honeycomb-shaped silicon carbide ceramic carrier, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Weigh 90 g of silicon carbide powder with a particle size of 50-65 μm, 10 g of silicon carbide powder with a particle size of 10-40 μm, 12 g of silicon-aluminum-based clay, 2 g of hydroxypropyl methylcellulose, and 3 g of polyethylene oxide. The prepared honeycomb ceramic powder was placed in a mixer, and dry mixed for 0.5 hours.

[0043] (2) Mix 3g of soybean oil and 30g of water, and stir evenly to obtain a solution; pour the solution into the stirred ceramic powder, and fully knead in a mixer for 0.5 hour to obtain plastic clay. The mud material is put into the extruder for extrusion molding after mud refining and vacuuming to obtain a honeycomb silicon carbide green body. The size and shape of the green body are controlled by the mold in the extrusion molding equipment.

[0044] (3) Place the green body in a cool and dry environment for 2 days, then place the shade-dried honeycomb green body at 60°C for 6 hours, and then raise the temperature to 105°C for 8 hour...

Embodiment 2

[0047] The ratio of silicon carbide powder in this example is shown in Table 1, and other preparation methods are the same as in Example 1.

[0048] After testing, the apparent porosity of the honeycomb silicon carbide ceramics prepared in this embodiment is 43%, and the porosity is 69%; the compressive strength A is 44Mpa, and the compressive strength B is 12Mpa; the thermal shock resistance is detected with 6 ℃ / min to 650 ℃, keep warm for 30 minutes, take it out and cool it naturally in the air to the greenhouse for one cycle, a total of 3 cycles, and the test results show that there are no cracks or damages in the 3 times.

Embodiment 3

[0050] The ratio of silicon carbide powder in this example is shown in Table 1, and other preparation methods are the same as in Example 1.

[0051] After testing, the apparent porosity of the honeycomb silicon carbide ceramics prepared in this embodiment is 43%, and the porosity is 68%; the axial compressive strength is 42Mpa, and the compressive strength radially is 13Mpa; thermal shock resistance is detected with 6 ℃ / min to 650 ℃, keep warm for 30 minutes, take it out and cool it naturally in the air to the greenhouse for one cycle, a total of 3 cycles, and the test results show that there are no cracks or damages in the 3 times.

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
Particle sizeaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a honeycomb-shaped silicon carbide ceramic carrier, and a preparation method and an application thereof. The preparation method comprises the following steps: mixing of raw materials: a step of mixing main materials and auxiliary materials so as to obtain a mixed material, wherein the main materials comprise a first silicon carbide powder material with a particle size of 50 to 65 [mu]m and a second silicon carbide powder material with a particle size of 10 to 40 [mu]m, and the auxiliary materials comprise a sintering auxiliary agent, an adhesive and a pore-forming agent; preparation of a green body; and sintering. The honeycomb-shaped silicon carbide ceramic carrier prepared by using the method provided by the invention can be applied to the fields of metallurgy, environmental protection, chemical industry, energy, biology, food and medicine. According to the invention, the use of two silicon carbide powder materials with different particle sizes increases the water content of a clay material and facilitates extrusion of the clay material, so a ceramic carrier with smooth surface is obtained; meanwhile, the ceramic carrier prepared by using the method provided by the invention has the advantages of high porosity, high strength and more applicability to practical application.

Description

technical field [0001] The invention relates to a honeycomb ceramic, in particular to a honeycomb silicon carbide ceramic carrier and its preparation method and application. Background technique [0002] Honeycomb ceramics is a kind of honeycomb industrial ceramics, inside of which are many through honeycomb parallel channels, because of its high strength, high temperature resistance, corrosion resistance, wear resistance and other excellent properties, it is widely used in regenerators, fillers, Filtration materials and catalyst carriers and other fields. [0003] When the honeycomb ceramic is used as a catalyst carrier, active components such as precious metals, rare earth metals or transition metals are usually directly loaded on the surface of the honeycomb ceramic carrier by the impregnation method, or a layer of unique coating material is first coated on the surface of the honeycomb ceramic carrier and then loaded Active components, prepared catalysts with correspondi...

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): C04B38/06C04B35/565B01J32/00B01J27/224
Inventor 吴彦霞梁海龙赵春林陈鑫黄瀚涛霍艳丽刘海林唐婕胡利明
Owner CHINA BUILDING MATERIALS ACAD
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