Steatite is a low cost material with high electrical resistance at high temperatures, good mechanical strength and a very low dielectric loss factor. Such properties make it ideal for high frequency, low loss, and high voltage insulation. Moreover, steatite is an excellent material for electrical engineering as it can be readily shape sintered into a wide variety of forms such as washers, bushings, resistor forms, spaces and beads.
Steatite has been used for many years in large-scale industrial systems, household electronic appliances, aerospace and automotive applications, and specialized eletro-technical instruments such as cathode-ray tubes.
|Water Absorption||C 20-97||%||0||0|
|Elastic Modulus||C848||psi x106||15||15|
|Shear Modulus||C848||psi x106||6||6|
|C.T.E., 25 - 100°C||C372-96||x10-6/°C||7.3||8.5|
|C.T.E., 25 - 300°C||-||-||7.4||8.6|
|C.T.E., 25 - 600°C||-||-||7.5||8.6|
|Thermal Conductivity, 25°C||C408||W/m-K||3||3|
|Max Use Temperature (Non-Loading)||-||°F||2350||2350|
|Max Use Temperature (Non-Loading)||-||°C||1290||1290|
|Dielectric Strength (.125" Thick)||D149-97A||V/mil||260||270|
|Dielectric Constant @ 1MHz||D150-98||-||5.6||5.7|
|Dielectric Loss @ 1MHz||D150-98||-||0.003||0.0014|
|Volume Resistivity, @25°C||D257||ohms-cm||>1E +14||>1E +14|
|Volume Resistivity, @300°C||-||-||2E +13||1E +11|
|Volume Resistivity, @700°C||-||-||2E +09||2E +10|
Note: The information in this data sheet is for design guidance only. STC does not warrant this data as absolute values. Forming methods and specific geometry could affect properties. Slight adjustments can be made to some of the properties to accommodate specific customer requirements. Most of the dense materials in the table are resistant to mechanical erosion and chemical attack. STC has performed ASTM testing qualification for certain compositions, in accordance with ASTM D2442. Please consult our technical staff for appropriate material and specifc test results.
Note: In addition to the above compositions, STC offers a wide range of alternative materials. Please contact one of our applications engineers for material requirements that may not be shown above.