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Thermansys produces a broad range of analytical grade, recrystallized, dense Alumina crucibles in various sizes and
forms with max operating temperature 1750˚C
Alumina (Al2O3) is one of the most important ceramic oxides, widely used in structural, electronics, medical, and electrical fields. It is highly valued as an engineering technical ceramic due to its high hardness, excellent wear resistance, and low cost.
Recrystallized Alumina crucibles are sensitive to thermal shock.
Heat up: Warm up the furnace chamber gradually. Heating rate of 3-4 °C per minute is recommended for the first 1-2 hours to reduce the impact of thermal shock. Maximum recommended heating rate 6 °C per minute.
Cool down: Lower the temperature as gradually as possible. Recommended cooling down rate is more severe than corresponding heating rate and should be retained below 5 °C per minute. It is better to remove the crucibles from the hot zone only if the temperature drops below 100 °C. When taking the crucibles out of furnace and bring them into room temperature to pour the melted material try to make the process as gradual as possible. A better practice is after pouring the melted metal to restore the crucible back into the furnace and leave it cool down inside the furnace.
Alumina crucibles can be used at high temperature under oxidizing (air), reduced, or inert (Nitrogen, Argon) conditions with no restriction. They resist attack by all gases except wet Fluorine and they can also be used under vacuum conditions, although exhibit a rate 10-7 to 10-6 g/cm2.sec of weight loss.
Alumina crucibles have very good chemical resistance against diluted or concentrated Acids (with the exception of hydrofluoric acid and phosphoric acid), Alkalis, Melted Metals and Halogens. Alumina is insoluble in water and has negligible solubility in strong acid and alkaline solutions. The low chemical solubility of alumina ceramics components makes them highly resistant to chemical corrosion. The ultra-high final firing temperature that Alumina crucibles are exposed during manufacturing process improves even further this behavior. The almost zero porosity and excellent smoothness of Thermansys crucibles surface prevents chemical attack. Generally, Alumina crucibles are the material of choice for a wide range of general purpose laboratory and industrial applications.
Chemical erosion of ceramic materials is not easy to be measured and determined in a way that will lead to accurate and represented scientific data for all shapes and sizes.
Our ceramic materials, as they are delivered, do not contain substances dangerous to health, or create them during use. They are produced using natural inert raw materials. Any organic binder or other substances used during manufacturing are burned through production firing. Thermansys however cannot guarantee that ceramic crucibles exposed to conditions that could produce residual material or create material transformations retain their health and safety properties upon reuse.
The product at its final delivery form is fully dense and do not produce dust during normal handling and operation. However, if the customer desires to proceed with further product processes like cutting or drilling inert dust might be created. Workers therefor should be provided with suitable dust protection equipment.
Thermanys, a leading technology firm, is relied upon by prestigious technical universities, research centers, and private high-tech laboratories. Our objective is to develop exceptionally reliable and cutting-edge products, prioritizing user ease-of-use as a central strategy.
Thermanys, a leading technology firm, is relied upon by prestigious technical universities, research centers, and private high-tech laboratories. Our objective is to develop exceptionally reliable and cutting-edge products, prioritizing user ease-of-use as a central strategy.
