Unlock instant, AI-driven research and patent intelligence for your innovation.

Thermal shock resistant composite ceramic material

A multiphase ceramic and thermal shock resistance technology, applied in the field of ceramic materials, can solve the problem that the strength of alumina-zirconia-mullite composite ceramics cannot be improved, and the thermal shock resistance and mechanical properties of the thermal shock resistance ceramic materials are not specified. The problem of low strength, etc., achieves the effects of high density, good thermal shock resistance, and improved flexural strength and fracture toughness.

Active Publication Date: 2022-01-21
SHANGHAI RES INST OF MATERIALS CO LTD
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this patent, mullite is sintered from the corundum phase matrix phase formed by Al2O3 and the added SiO2. This patent requires isostatic pressing at 90-220MPa and sintering at a high temperature within the temperature range of 1630°C-1680°C, which is complicated to prepare and high in cost, and the invention does not specifically indicate the thermal shock resistance of the invented thermal shock-resistant ceramic material
[0005] "Research on the Modification of Alumina-Mullite High-temperature Composite Ceramics" (Fan Fang, Silicate Bulletin, Issue 4, 2020) disclosed that alumina-mullite The preparation method of the stone-zirconia composite ceramics, the mass fraction of the raw materials used is 52% of alumina, 26% of mullite, and 22% of zirconia. This method improves the resistance of the material by reducing the content of alumina and increasing the content of mullite. Thermal shock resistance, but the mechanical strength of the prepared material is not high (200-205MPa), and the bulk density is 3.5g / cm3, which cannot improve the alumina-zirconia-mullite complex The strength of the same ceramic, and the ceramic material 1500 ℃ ~ 20 ℃ air cooling thermal shock only increased by 50%

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
  • Thermal shock resistant composite ceramic material
  • Thermal shock resistant composite ceramic material
  • Thermal shock resistant composite ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The mass percentage of the thermal shock-resistant composite ceramic material blank in this example is: alumina 60%, mullite 25%, zirconia 15%, adding an appropriate amount of deionized water, wet ball milling for 5 hours, and then drying in a drying box for 10 hours After sieving, granulation, dry pressing at 31MPa, sintering at a temperature of 1600°C for 2 hours, and cooling in a furnace to obtain an alumina-based composite material. The relevant data are shown in Table 1.

Embodiment 2

[0037] The mass percentage of the thermal shock-resistant composite ceramic material blank in this example is: alumina 61%, mullite 18%, zirconia 21%, adding an appropriate amount of deionized water, wet ball milling for 5 hours, and then drying in a drying oven for 10 hours After sieving, granulation, dry pressing at 31MPa, sintering at a temperature of 1600°C for 2 hours, and cooling in a furnace to obtain an alumina-based composite material. The relevant data are shown in Table 1.

Embodiment 3

[0039] The mass percentage of the thermal shock-resistant composite ceramic material blank in this example is: alumina 65%, mullite 17%, zirconia 18%, adding an appropriate amount of deionized water, wet ball milling for 3 hours, and then drying in a drying oven for 10 hours After sieving, granulation, dry pressing at 40MPa, sintering at 1610°C for 2 hours, and cooling with the furnace to obtain an alumina-based composite material. The relevant data are shown in Table 1.

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 relates to a thermal shock resistant composite ceramic material, in particular to a thermal shock resistant composite ceramic material which is directly prepared from the following raw materials in percentage by mass: 60-68% of aluminum oxide, 15-21% of zirconium oxide and 11-25% of mullite, the sum of the adding amounts of the aluminum oxide, the zirconium oxide and the mullite is 100%. Compared with the prior art, aluminum oxide with high hardness and high compressive strength, mullite with lower thermal expansion coefficient and zirconium oxide with corrosion resistance and high melting point are directly added into the prepared composite ceramic material so that the composite ceramic material has the characteristics of high strength, good thermal shock resistance and the like, and is simple to prepare, easy to operate and low in cost.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a thermal shock-resistant complex phase ceramic material. Background technique [0002] Ceramic materials have high hardness, oxidation resistance, corrosion resistance and other characteristics, and are widely used in various scenarios. However, ceramic materials themselves are brittle and prone to fracture when subjected to thermal shock, which limits the application range of ceramic materials. [0003] Alumina (Al 2 O 3 ) has a variety of crystalline states, with high melting point (~2015 ° C), hardness, Young's modulus; good wear resistance, low price, abundant resources, etc., and is widely used, but pure alumina ceramic materials are resistant to thermal shock The performance is poor, and the strength retention rate is only 22% after thermal shock with a temperature difference of 300 °C. [0004] Chinese patent CN106927840B discloses a preparation method of a thermal shock-resistant...

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): C04B35/10C04B35/622
CPCC04B35/10C04B35/622C04B2235/3244C04B2235/3463C04B2235/96C04B2235/77
Inventor 范立坤赵婷婷杜亚男
Owner SHANGHAI RES INST OF MATERIALS CO LTD