Guide to ceramic materials

Aluminum nitride — Aluminum nitride exhibits lower thermal expansion than alumina that closely matches the expansion of silicon wafers and it can be metalized, making it an ideal material for semi-conductor applications.

Alumina silicate (Lava) — Alumina silicate or Lava is a machinable ceramic material. It has a high use temperature, and excellent thermal / electrical insulating properties.

Boron nitride — Boron nitride can be machined using standard carbide drills. BN exhibits a high electrical resistance, low dielectric constant and loss tangent, low thermal expansion, chemical inertness and good thermal shock resistance. With these properties BN lends itself a useful material for vacuum components, various electrical components and nuclear applications.

Glass (Pyrex®, Vycor® and similar materials) — Various glasses are used in many applications where optical high thermal shock resistance and insulating properties are required.

Graphite — Graphite has excellent thermal shock and chemical resistance making it an ideal material for molds, furnace boats, plating anodes and brazing fixtures.

Mullite — Mullite is an excellent structural material due to its high temperature stability, strength and creep resistance. It has a low dielectric constant and high electrical insulation capabilities. Typical applications include Kiln Furniture, furnace center tube, heat exchange parts, heat insulation parts and rollers.

Mycalex®— With several grades to choose from, varying in strength and temperature performance, Mycalex® is an excellent machinable ceramic insulator material that can be fabricated into complex parts.

Quartz — With its superior thermal, chemical and optical properties, quartz often is used in the lighting and semi-conductor fields.

Silicon carbide — Silicon carbide is known for its high hardness and abrasion resistance. Common applications include: pump seals, valve components and wear-intensive parts.

Steatite — The cost of Steatite is relatively low when compared with other ceramic materials. It’s useful in applications where insulating and temperature resistance are a concern.

Zirconia — Stabilized zirconia offers chemical and corrosion resistance to temperatures well above the melting point of alumina. Zirconia ceramics have the ability to absorb great amounts of stress relative to other ceramic materials. It exhibits the highest mechanical strength and toughness at room temperature.
Source: Ceramic Products Inc.