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Ceramic Insulators

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The most easily recognizable ceramic insulators can be found at power substations and on electrical transformers suspended from utility poles. They are called bushings and are usually designed with several conic or circular tiers stacked on top of each other. Read More…

Ceramic Insulators Ceramic insulators are ceramic materials used to insulate electrically-conductive materials or temperature-controlled enclosures. In the context of electrical insulation, ceramic insulators are usually limited to the insulation of electrically conductive materials on an industrial or municipal scale.
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Leading Manufacturers

Myrtle Beach, SC  |  609-397-8330, 609-397-8341

As 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.

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LSP Industrial Ceramics, Inc. $$$

Pittsburgh, PA  |  412-406-7171

C-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.

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C-Mac International, LLC $$$

Quakertown, PA  |  215-536-3500

Insaco 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.

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Insaco Inc. $$$

Fremont, CA  |  510-249-9700

Applied Ceramics is a fabricator of custom-made ceramic parts designed for semiconductor, solar, fuel cell, oil drilling, nuclear, and numerous other industries. Materials include ACI-995 Alumina, Zirconia, and more. Our extensive experience with precision designs supported by our team of specialists ensures that our customers have the ideal solution to meet the needs of their application. To get started, contact us today!

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Applied Ceramics $$$

Berkeley Lake, GA  |  770-662-0456

Thermal Products Company, Inc. offers energy-saving and cost-saving ceramic fiber insulation for high temperature applications. Check out the benefits of our ceramic fiber insulation and other thermal products: ceramic fiber blanket, board, paper, textiles, coatings, mixes, modules, heating elements, as well as die cut gaskets, cut blanket & paper strips, and machined board shapes.

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Thermal Products Company, Inc. $$$

St. Joseph, MI  |  269-985-5496

LECO has been providing top-quality ceramic products to industries worldwide for more than 50 years. Each crucible, ladle, stopper rod, nozzle, kiln furniture and ceramic product goes through a rigorous testing cycle to assure it meets our stringent in-house quality standards, ISO 9001:2000 FM 24045 ISO 9001:2015 Q-994, and your exact specifications.

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LECO Corporation $$$
placeholder image LSP Industrial Ceramics, Inc. C-Mac International, LLC Insaco Inc. Applied Ceramics Thermal Products Company, Inc. LECO Corporation

These tiers are designed to keep water as far away from the center of the bushing as possible; this reduces the number of avenues by which electricity could be conducted in the case of a bushing puncture or fracture.

In the context of thermal insulation, ceramic insulators are used to help maintain the temperatures of industrial ovens, art studio kilns and many other kinds of heat-generating equipment. This improves heating process efficiency while simultaneously preventing the unwanted transmission of heat, often in unsafe degrees, into workspaces.

Alumina Ceramic Insulators Ceramic Insulators - LSP Industrial Ceramics, Inc.

Ceramics are often good choices for heat and electrical insulation because of the electrical and thermal non-conductivity of some ceramic varieties.

Ceramics are versatile materials and can be shaped into solid insulation of any shape. Ceramic fibers can also be spun into high temperature insulation "wool." Ceramic wool is an excellent insulator because it is easily placed around heating enclosures and prevents heat from escaping. Ceramics vary in their electrical and thermal conductivity.

Aluminum nitride and silicon carbide, for example, conduct heat well, which does not make them suitable thermal insulators. If either material was used to insulate a heating enclosure, heat generated in the enclosure would be transferred quickly to the insulation and then transferred again to the area outside of the enclosure.

Aluminum oxide ceramics are fair thermal insulators and are most effectively employed in low-heat insulation applications. Silicon nitride is better still as an insulator and zirconia is among the most effective ceramic insulators, transmitting very low levels of heat between itself and heating enclosures.

Another important property of ceramics related to their capacity as insulators is their low thermal shock susceptibility. Thermal shock susceptibility is the tendency of a material to become damaged when exposed to frequently or quickly changing temperatures. Most ceramics are very thermal shock-resistant.

Ceramic Insulator Informational Video