Ceramic materials typically exhibit excellent chemical stability in high-temperature environments, with the following specific manifestations:
Antioxidant properties
Most ceramic materials have stable structures and are not easily subjected to chemical reactions with oxygen in high-temperature aerobic environments, demonstrating good oxidation resistance. For example, aluminum oxide (Al ₂ O3) ceramics have high chemical bond energies between atoms. At high temperatures, even if there is a large amount of oxygen around them, it is difficult to oxidize and can maintain its chemical structure unchanged for a long time. Therefore, they are often used in high-temperature furnace linings, thermal barrier coatings for aircraft engines, and other parts that require high temperature oxidation resistance. Zirconia (ZrO ₂) ceramics are no exception, as they can effectively resist oxygen erosion and ensure structural and performance stability in high-temperature applications due to their stable lattice structure.
Resistance to acid and alkali corrosion
Ceramic materials also have strong resistance to corrosive chemicals such as acids and alkalis in high temperature environments. Taking silicon carbide (SiC) ceramics as an example, whether facing strong acid solutions (such as sulfuric acid, hydrochloric acid, etc.) or strong alkali solutions (such as sodium hydroxide, etc.) at high temperatures, their chemical structure is not easily destroyed because the chemical bond energy formed between silicon and carbon in SiC is high, which can withstand the erosion of these chemicals. This makes SiC ceramics applicable as protective coatings for some high-temperature and corrosive media reaction vessels, pipelines and other equipment in the chemical industry, protecting the equipment substrate from corrosion.
Thermal corrosion resistance
In environments with high temperatures and complex chemicals such as sulfur, alkali metals, halides, etc., ceramic materials still exhibit good resistance to thermal corrosion. For example, in some industrial furnaces that use inferior fuels, the high-temperature gas produced by combustion contains impurities such as sulfur. Ordinary metal materials are easily damaged by thermal corrosion, but ceramic materials can rely on their stable chemical composition and structure to prevent these impurities from reacting with themselves, avoiding material performance degradation, structural damage, and other situations, thus ensuring long-term stable use in harsh thermal corrosion environments.
Reaction characteristics with other substances
Ceramic materials are generally not prone to chemical reactions with common gases (excluding oxygen, such as nitrogen, carbon dioxide, etc.) and most organic compounds at high temperatures. For example, in high-temperature synthesis processes, reaction vessels made of ceramics can stably contain reactants without participating in the reaction process, providing a stable environment for the smooth progress of chemical reactions, ensuring the purity of reaction products and the repeatability of the reaction.
However, it should be noted that although ceramic materials have high overall chemical stability, some changes may still occur under certain extreme high temperatures and special chemical environments. For example, in the case of ultra-high temperature and strong oxidizing and corrosive mixed media, some ceramic materials may experience erosion at grain boundaries and slow changes in surface structure. However, this situation is relatively rare. Generally, in high-temperature environments such as conventional high-temperature industrial applications and aerospace, the chemical stability of ceramic materials can meet the requirements well.

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High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.