KC Carbon-
Ceramic

KC Carbon-Ceramic, a non-flammable composite material made of graphite and ceramic, offers exceptional oxidation resistance with a thermal oxidation rate less than one-tenth that of graphite. It combines the strengths of carbon and ceramic, overcoming the limitations of both materials.

What is KC Carbon-Ceramic?

The KC Carbon-Ceramic is a unique composite material that combines the advantages of carbon and ceramic.

High oxidation resistance

When heated, the glass layer deposited on the surface forms a coating that inhibits the oxidation of graphite. It exhibits excellent oxidation resistance, with a thermal oxidation rate less than one-tenth that of graphite. The material can withstand temperatures up to 1200°C in air.

Versatile Compositions

By varying the mix of carbon and ceramics, the material can be tailored to specific operating environments and applications. It offers benefits such as high strength, thermal shock resistance, wetting resistance, good electrical conductivity, and excellent friction and sliding properties.

Dense & Durable

The KC Carbon-Ceramic is a high-density material with significantly lower porosity and gas permeability compared to common graphite materials. This composite of carbon and ceramics provides exceptional mechanical strength.

Mechanisms for high oxidation resistance

When heated to 600–1200 °C in air, silicon carbide and boron carbide within the KC Carbon-Ceramic migrate from the interior to the surface. These materials oxidize to form a protective glass-like layer with a thickness of several micrometres.

If the protective layer becomes damaged or worn, it efficiently self-repairs in a high-temperature oxidizing environment, ensuring continuous surface protection.

Discover the Benefits of the KC Carbon-Ceramic

01 High Thermal Shock Resistance

The KC Carbon-Ceramic exhibits excellent spalling resistance and withstands thermal shock with a temperature difference of 800–1200°C.

02 Highly Resistant to Molten Metal Adhesion

The graphite material that forms the base of the KC Carbon-Ceramic does not stick to molten metal and is resistant to high-temperature corrosion.

03 Low Thermal
Expansion

With very low thermal expansion and excellent wear resistance, this material is ideal for glass moulding and various metal moulds.

04 Excellent Sliding Properties

Graphite materials are self-lubricating and can therefore be used in high-temperature ranges, typically between 260°C and 450°C, where grease cannot be used, as well as in liquids and areas where lubricants are not applicable.

Superior Machinability for Versatile Applications

Effortless Machining with Carbon-Based Material
The Carbon-Based Material ensures smooth and precise machining, offering high efficiency and making it ideal for a wide range of applications.

No Molds Needed – Flexible for Any Order Size
Molds are unnecessary in the production process, providing flexibility for both small and large order sizes.

Easily Adaptable to Design Changes
KC Carbon-Ceramic is highly adaptable, making it ideal for prototype development and custom orders.

Representative KC Carbon-Ceramic Materials Applications

Non-ferrous Metal Melting Materials

Used for aluminum, copper, and copper alloy melting. Applications include flow control stoppers, nozzles, degassing components, thermocouple protection tubes, and molten metal level sensors.

Glass-Related Materials

Ideal for bottle molds and gob sliding materials.

Various Heat-Resistant Materials

High-temperature-resistant mechanical components, as well as molds for molding and sintering applications.

Actual Implementation Cases

This table compares the lifespan of components used in aluminum and copper melting processes before and after introducing KC Caron-Ceramic products.

Aluminum Melting

Component	KC Caron-Ceramic Durability	Original Material	Durability Before KC Carbon-Ceramic
Stopper	6–12 months or more	Graphite	3 weeks–1 month
Stopper	6–12 months or more	Low-cost Ceramic	2 weeks–1 month
Heat-Resistant Tube	6–12 months or more	Iron + Stainless Steel	1–2 months
Heat-Resistant Tube	6–12 months or more	Low-cost Ceramic	2 weeks–1 month
Heat-Resistant Tube	6–12 months or more	Sialon	1–2 years
Surface Sensor	6–12 months or more	Iron + Stainless Steel	2–6 months
Surface Sensor	6–12 months or more	Graphite	1–3 months
Nozzle	3–12 months	Graphite	2 weeks–1 month
Rotating Degassing Unit	6–12 months or more	Graphite	1–2 weeks

Copper Melting

Component	KC Caron-Ceramic Durability	Original Material	Durability Before KC Carbon-Ceramic
Stopper	1–3 months	Graphite	1 day –3 weeks
Nozzle	1–3 months	Graphite	1–2 weeks
Nozzle	1–3 months	Refractory Material	1–2 weeks
Float Nozzle	1–3 months	Graphite	1 day–1 week
Heat-Resistant Tube	1–3 months	Graphite	1 day–1 week

Comparison of Physical Properties with Other Materials

	Density (g/cm³)	Bending Strength (MPa)	Thermal Conductivity (W/m·K)	Electrical Resistivity μΩｃｍ	Thermal Expansion Coefficient (×10⁻⁶/°C)
KC Caron-ceramic BS10609	2.09	88	63	1000	6.0
General Graphite	1.78	50	100	1100	4.6
Stainless Steel SUS304	7.93	―	16	72	17.3
Copper	8.93	―	370	1.7	16.7
Al₂O₃	3.9	400	30	10⁸	7
ZrO₂	6	1000	4	10⁶	10
SiC (Silicon Carbide)	3.1	480	160	10⁵⁻⁸	4
Si₃N₄	3.23	1000	20	10⁴	3