Conductive Silicon Carbide [Carborundum]

In summary, the conversation discusses the creation of a conductive Silicon Carbide (SiC) heating element. The US patent 650234, filed in 1899, suggests that crushed SiC crystals can be glued together with diluted glue and sintered to create the element. It also mentions the addition of 15-20% graphite for conductivity. The question is posed whether this is the same process used today, and if sintering at 2000C with added graphite can result in a usable heater element. The conversation suggests further research in the patent literature for potential sintering aids.
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I am trying to create a conductive Silicon Carbide (SiC) heating element.

The US patent 650234 "Process of making carborundum articles", filed in 1899 states essentially that crushed SiC crystals can be be glued together (using diluted glue) then sintered. It states that the addition of 15-20% graphite is added when conductivity is desired.

Is this the same process used to create SiC heater elements today? In other words, if I sinter a quantity of SiC crystals with 20% graphite added, then sinter at 2000C, can I expect to be able to use the resulting SiC as a resistive heater element? Any recommended sintering aids?
 

FAQ: Conductive Silicon Carbide [Carborundum]

What is conductive silicon carbide?

Conductive silicon carbide, also known as carborundum, is a synthetic compound made up of silicon and carbon atoms. It has a unique crystal structure that gives it excellent conductivity properties, making it a valuable material in various industries.

How is conductive silicon carbide produced?

Conductive silicon carbide is produced through a process called carbothermal reduction, in which a mixture of silica sand and carbon is heated to extreme temperatures in an electric arc furnace. The resulting product is then crushed and purified to create the conductive silicon carbide crystals.

What are the main applications of conductive silicon carbide?

Conductive silicon carbide is used in a wide range of applications, including as a semiconductor material in electronics, a refractory material in high-temperature industries, and as an abrasive in cutting and grinding tools. It is also used in the production of steel and ceramics.

How does conductive silicon carbide compare to other conductive materials?

Conductive silicon carbide has several advantages over other conductive materials, such as copper and aluminum. It has a higher melting point, better resistance to corrosion, and superior electrical and thermal conductivity. It is also more lightweight and has a lower density compared to other conductive materials.

Is conductive silicon carbide safe for use in everyday products?

Yes, conductive silicon carbide is generally considered safe for use in everyday products. It is non-toxic and does not pose any significant health risks. However, as with any material, it is essential to handle it with care and follow safety guidelines when using it in industrial settings.

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