Ceramic industry
Release time：2019/07/11 Author：
aluminium dihydrogen phosphate
Ceramic high temperature adhesive introduction:
The ceramic high temperature adhesive is made of special high temperature solution, and the temperature resistance is divided into 2300 ° C and 2600 ° C. Both ceramic high-temperature blocking coatings can be cured at room temperature, and can be polymerized into a network structure of high temperature resistant binder at high temperatures, as long as the material is an inert oxide that promotes sintering, the selected oxide is at a high temperature. The glass can be formed under the surface to enhance the airtightness of the coating. On the one hand, the ceramic high-temperature adhesive can be solidified at room temperature, has strong bonding ability with high temperature resistance, and has high temperature-resistant compatibility. On the other hand, it can penetrate with the binder at high temperature to form a whole structure with a certain strength of the boat. High-temperature ceramic adhesives are used to insulate oxygen and its corrosive gases, and also have a certain penetration with the substrate to enhance adhesion to the substrate and thermal shock resistance.
The high temperature resistance of organic adhesives on the market usually does not exceed 1000 °C. The current high-temperature ceramic binder uses a proprietary high-temperature solution that can withstand temperatures above 3000 °C and can be used for a long time in the fire without deformation. It breaks the worldwide technical problem that the high temperature ceramic binder only has a temperature resistance below 1000 °C. The high temperature ceramic binder is composed of an inorganic base, a metal oxide, a hydroxide, and the like. High temperature resistant rubber has excellent high temperature resistance, small shrinkage, high hardness, high wear resistance and good aging resistance. It is a kind of special adhesive with promising future. High temperature ceramic binder is gray or slightly yellow viscous liquid, soluble in water, weakly acidic, free of sodium ions, suitable for bonding under high temperature conditions of 300 °C-3000 °C, especially suitable for high temperature furnace kiln Built or repaired. Such as ceramic bonding, various high-temperature furnaces, heat treatment furnace masonry and repair, kiln wheel repair spray materials, and paste aluminum silicate refractory fiber.
Ceramic high temperature adhesive features:
Ceramic high temperature adhesives are widely used for bonding and potting of high temperature resistant metal parts, and can also be used as wear and oxidation resistant coatings. It can repair equipment that works under high temperature conditions, such as repairing damaged or broken acid-resistant tanks, blast furnace linings, steel ingot molds, etc., as well as burner ignition devices, potting of molten steel temperature probes.
Ceramic high temperature adhesive use and precautions:
1. The bonding surface is roughened and rust, oil and grease are removed. The joint is designed to be socketed.
2, adjusting the glue: the solid liquid phase is proportioned and adjusted to make a uniform and flowable paste.
3, coating (filling) glue curing: the glue is applied (filled) on the surface to be bonded (sealed), after assembly, a little contact pressure to make it solidify. If it is not strong enough and does not require resistance to media, it can be cured at room temperature. Otherwise it cures under curing conditions.
Precautions
1. The more the amount of glue is adjusted, the faster the curing reaction speed.
2. The higher the ambient temperature, the faster the curing reaction rate.
3, each time the amount of glue should not be too much, adjust the glue on the radiator (such as copper).
4. In order to achieve better performance, it must be prepared in strict accordance with the prescribed ratio.
5. Physical and mechanical properties are better when fully cured.
Shorten the curing time method:
1. Increase the ambient temperature.
2. Increase the temperature of the workpiece to be repaired.
3. After applying the repairing agent, use a heat source such as an infrared lamp or an iodine-tungsten lamp to heat it, but the heat source should be 400mm away from the repairing layer (the ambient temperature should not be higher than 100°C), and the flame should not be directly heated.
You may be interested in the following information？
