#ceramic <br>[a]https%3A%2F%2Fwww.china-sealcon.com%2Fmechanical-sealing-material%2Fceramic-mechanical-seal.html[/a] <br>Ceramic material refers to inorganic non-metallic materials made of natural or synthetic compounds through forming and sintering. It has the advantages of high melting point, high hardness, high wear resistance and oxidation resistance. A ceramic O ring, also known as a ceramic seal, is a type of sealing device made from ceramic materials. Ceramic seals for water pumps is widely used in machinery, chemical industry, petroleum, pharmaceutical, automobile and other fields. Because of its advantages, ceramic shaft seal has become Sealcon’s great choice for sealing materials. <br> <br>If you are looking for a reliable ceramic pump seal muanfacturer and supplier, don&#039;t hesitate to contact us! <br> <br>Ceramic Material Properties <br>Mechanical seals has the high demands about sealing materials, so the ceramic is choosed to make ceramic mechanical seal because of its competitive features. <br> <br>Mechanical characteristic <br>Ceramic material is the material with the best rigidity and highest hardness in engineering materials, and its hardness is mostly above 1500HV. Ceramics have high compressive strength, but low tensile strength, poor plasticity and toughness. Ceramic seals perfectly inherit these characteristics. <br> <br>Thermal characteristic <br>Ceramic materials generally have high melting point (mostly above 2000), and have excellent chemical stability at high temperature. The thermal conductivity of ceramics is lower than that of metal materials. At the same time, the linear expansion coefficient of ceramics is lower than that of metal. When temperature changes, ceramics have good dimensional stability. <br> <br>Electrical characteristic <br>Most ceramics have good electrical insulation, so a large amount of insulation is used to make all kinds of voltages (1kV~110kV). Ferroelectric ceramics barium titanate (BaTiO3) has high dielectric constant which can be used in the production of capacitor, ferroelectric ceramics. A few ceramics also have the characteristic of semiconductor, can be a rectifier. <br> <br>Chemical characteristic <br>Ceramic material is not easy to be oxidized at high temperature, and has good corrosion resistance to acid, alkali and salt. <br> <br>Optical characteristic <br>Ceramic materials also have unique optical properties, which can be used as solid laser materials, optical fiber materials, optical storage containers, etc. Transparent ceramics can be used in high-pressure sodium lamp tubes.Magnetic ceramics (ferrites such as MgFe2O4, CuFe2O4, Fe3O4) have a wide range of applications in recording tapes, records, transformer cores, and large computer memory components. <br> <br>As a professional china mechanical seal manufacturers, Sealcon has high-quality sealcon china for sale. Welcome to contact us if needed.

#Mechanical <br>[a]https%3A%2F%2Fwww.china-sealcon.com%2Fmechanical-sealing-material%2Fcarbon-seal.html[/a] <br>Mechanical carbon seal has a long history. Graphite is an isoform of element carbon. In 1971, the United States studied the successful flexible graphite sealing material, which solved the leakage of atomic energy valve. After deep processing, the flexible graphite becomes an excellent sealing material, which are made into various carbon mechanical seal with the effect of sealing components. These carbon shaft seal are used in chemical, petroleum, electric power industries such as high temperature fluid seal. <br> <br>Because the flexible graphite is formed by the expansion of expanded graphite after high temperature, the amount of intercalating agent remaining in the flexible graphite is very small, but not completely, so the existence and composition of the intercalation agent have a great influence on the quality and performance of the product. <br> <br>Selection of Carbon Seal Material <br>The original inventor used concentrated sulfuric acid as oxidant and intercalating agent. However, after being applied to the seal of a metal component, a small amount of sulfur remaining in the flexible graphite was found to corrode the contact metal after long term use. In view of this point, some domestic scholars have tried to improve it, such as Song Kemin who choosed acetic acid and organic acid instead of sulfuric acid. acid, slow in nitric acid, and lower the temperature to room temperature, made from a mixture of nitric acid and acetic acid. By using the mixture of nitric acid and acetic acid as the inserting agent, the sulfur free expanded graphite was prepared with potassium permanganate as oxidant, and acetic acid was slowly added to nitric acid. The temperature is reduced to room temperature, and the mixture of nitric acid and acetic acid is made. Then the natural flake graphite and potassium permanganate are added to this mixture. Under constant stirring, the temperature is 30 C. After reaction 40min, the water is washed to neutral and dried at 50~60 C, and the expanded graphite is made after high temperature expansion. This method achieves no vulcanization under the condition that the product can reach a certain volume of expansion, so as to achieve a relatively stable nature of the sealing material. <br> <br>If you are looking for a reliable carbon seal ring manufacturer, don&#039;t hesitate to contact us! <br> <br>As a professional mechanical seal manufacturer, Sealcon has high-quality sealcon china for sale. Welcome to contact us if needed.