Thermal Shock Resistance Of Common Technical Ceramics
Alumina ceramics, silicon nitride ceramics, mullite ceramics and cordierite ceramics all have good thermal shock resistance.
Among them, alumina ceramics are mainly used in the fields of high-temperature structural materials and electronic devices, and have good stability and mechanical strength at high temperatures. Silicon nitride ceramics have the characteristics of high strength, high hardness, wear resistance, oxidation resistance and corrosion resistance, and are better used in harsh environments such as high temperature, high pressure and friction. Mullite ceramics have good mechanical properties, insulation properties and chemical stability at high temperatures, and are widely used in ceramic industry, oil refining, chemical industry and other fields. Cordierite ceramics also have excellent heat resistance, chemical corrosion resistance and wear resistance, and perform well in environments such as high temperature, high pressure and acid-base corrosion.
How Much Are They?
The specific thermal shock resistance depends on many factors such as material quality, processing technology and service conditions, and it is difficult to give specific values. Generally speaking, alumina ceramics, silicon nitride ceramics, mullite ceramics and cordierite ceramics all show good thermal shock resistance, and have strong stability and stability in harsh environments such as high temperature and rapid temperature change. durability. For specific application scenarios, it is necessary to comprehensively consider various factors and select the most suitable material to ensure its best performance in actual use.
The order of thermal shock resistance from high to low is: silicon nitride ceramics > cordierite ceramics > alumina ceramics > mullite ceramics.
Among them, silicon nitride ceramics and cordierite ceramics show good stability and durability in harsh environments such as high temperature and rapid temperature change, so their thermal shock resistance is relatively high; alumina ceramics have Good stability and mechanical strength, but its thermal shock resistance is slightly inferior to silicon nitride ceramics and cordierite ceramics; although mullite ceramics also have certain thermal shock resistance, it is slightly inferior to the other three materials. Insufficient.
The above ranking is only based on the single factor of thermal shock resistance. In practical applications, it is necessary to comprehensively consider various properties of materials and select the most suitable materials. In addition to thermal shock resistance, various properties such as density, hardness, strength, wear resistance, corrosion resistance, thermal conductivity and insulation of materials need to be considered. In addition, in specific application scenarios, factors such as material cost, processing technology, and availability need to be considered.
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