Pure alumina is a refractory material, meaning that it can withstand extremely high temperatures without breaking down. Alumina’s melting point is approximately 3760°F. A form of alumina, aluminum oxide, is frequently used to make crucibles. Read More…
Leading Manufacturers
LSP Industrial Ceramics, Inc.
Myrtle Beach, SC | 609-397-8330, 609-397-8341As a manufacturer and stocking distributor of industrial and technical ceramics, LSP carries the most diversified inventory of ceramic tubes, spacers, bushings, etc. in the industry.
C-Mac International, LLC
Pittsburgh, PA | 412-406-7171C-Mac International, LLC is a custom ceramics supplier. We provide advanced ceramic component parts manufacturing for a variety of industries and provide solutions to many ceramic needs.
Insaco Inc.
Quakertown, PA | 215-536-3500Insaco provides custom grinding and machining services to fabricate precision parts from sapphire, quartz, and most technical ceramics including alumina, zirconia, silicon carbide, silicon nitride, aluminum nitride, and others.
Applied Ceramics
Fremont, CA | 510-249-9700Years of experience have created unique specializations and expertise of our engineering and product consultation team. Applied Ceramics has a proven track record in creating the highest quality products for semiconductor processing equipment, automotive ceramics, cutting tools and many other industrial ceramics. We’ve machined products for industries such as aerospace/aviation, medical, nuclear, and more, but can produce products from high-end materials for all relevant enterprises.
Du-Co Ceramics Company
Saxonburg, PA | 724-352-1511Du-Co Ceramics is a worldwide source for technical, precision ceramics since 1949, using extrusion, dry pressing and secondary machining processes. Standard products include thermocouple ceramic tubes, ball and socket beads, steatite washers, cup and shoulder bushings, ribbed and grooved bushings. Materials used are Steatite, Cordierite, Mullite, Alumina, Forsterite and MgO.
PremaTech Advanced Ceramics
Worcester, MA | 508-791-9549PremaTech Advanced Ceramics fabricates basic and complex components made of technical ceramics and other ultra-hard materials. For over 30 years, PremaTech has been an industry leader in ceramic machining and polishing, with special expertise in silicon carbide. We have in-house engineering and are ISO 9001 certified. Let us develop a solution for your most challenging application.
High Form and Cylindrical Alumina Crucibles - LSP Industrial Ceramics, LLCAluminum oxide is industrially refined from bauxite ore, which contains aluminum. Following multiple purification processes, a substance called calcined alumina is extracted, which contains mostly alumina with some impurities, primarily sodium oxide.
Conical Alumina Crucible and Disc - LSP Industrial Ceramics, Inc.Unfortunately, the less pure the alumina, the lower its resistance to heat. For this reason, high-purity alumina is preferred, especially in industrial laboratories. This type of alumina can be made using a similar process to calcined alumina.
The heat resistance of alumina crucibles is an especially important feature because they are used in chemical laboratories as containers for extremely hot chemical compounds. Alumina crucibles have applications in laboratory research, academia and industry and come in a wide variety of shapes and sizes. For example, high-form alumina crucibles are commonly used in academic laboratories.
These crucibles, which are often used to melt or heat chemicals over a Bunsen burner or in an oven, look like a deep, narrow cup. Commercially, high-form crucibles come in rectangular or cylindrical form. Other crucibles used in academic or research laboratories are usually small, with a diameter less than the size of an adult human hand, adequate for the small amount of chemicals they are required to hold.
All smaller crucibles are used with a lid made out of the same material, and are handled with tongs and gloves to prevent burning or other accidents.
Industrial alumina crucibles, which may be used for melting metals and creating alloys, can be much larger and require installation in the furnace with sufficient space and exterior support for use.