Isotropic Graphite SIGRAFINE ISO

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SIGRAFINE

last updated：Apr 30, 2020

SGLカーボンジャパン

Official site

SGL's isotropic graphite is a high-quality and highly reliable graphite with a history and track record of over 50 years.

Isotropic graphite is a finely structured graphite that boasts high mechanical properties. Today, isotropic graphite has become the mainstream of fine carbon. SGL began manufacturing isotropic graphite ahead of the world in the 1960s. SGL's isotropic graphite is backed by a long history of high quality and high reliability. <Main Features> ◎ High temperature stability ◎ Fine particle size ◎ High purity (Ash content < 5ppm) ◎ Chemical resistance ◎ Thermal shock resistance ◎ High conductivity (thermal & electrical) ◎ Machinability

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basic information

<Main Characteristics> ■ Particle Size Minimum 3 μm ■ Bulk Density ~ 1.88 g/cm3 ■ Ash Content < 200 ppm (standard) < 30 ppm (purified P30) < 5 ppm (purified P5) ■ Thermal Conductivity ~ 140 W/m-K ■ Coefficient of Thermal Expansion (20-200℃) 2.7 ~ 4.7 ppm/K <Shape and Size> Various shapes and sizes are available, including square/round blocks, pipe shapes, and long products (over 1m). Please feel free to contact us.

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Applications/Examples of results

[For semiconductors] Single crystal silicon pulling components [For solar cells] Polycrystalline silicon crystal manufacturing components Continuous casting dies High-temperature furnace (heaters, furnace structures, jigs, etc.) Hot press (dies, punches, heaters, spacers) Electrodes for discharge machining Crucibles for deposition

Line up（10）

Model number	overview
R300	【Particle Size】20μm　【Bulk Density】1.73g/cm3　【Flexural Strength】40MPa　【Thermal Conductivity】70W(m・K)　※An isotropic graphite characterized by low thermal expansion of 2.7ppm/K.
R340	【Particle Size】15μm　【Bulk Density】1.72g/cm3　【Flexural Strength】45MPa　【Thermal Conductivity】105W(m・K)　※A grade with balanced properties. Suitable for continuous casting of many alloys.
R510	【Particle Size】10μm　【Bulk Density】1.83g/cm3　【Flexural Strength】60MPa　【Thermal Conductivity】105W(m・K)　※A grade with dense structure and high mechanical properties.
R550	【Particle Size】10μm　【Bulk Density】1.83g/cm3　【Flexural Strength】65MPa　【Thermal Conductivity】95W(m・K)　※High density and high strength grade. Used in continuous casting for alloys that form carbides.
R650	【Particle Size】 7μm　【Bulk Density】1.84g/cm3　【Flexural Strength】65MPa　【Thermal Conductivity】95W(m・K)　※A grade with smaller particle size and higher strength.
R660	【Particle Size】10μm　【Bulk Density】1.75g/cm3　【Flexural Strength】50MPa　【Thermal Conductivity】45W(m・K)　※A special grade with high electrical resistivity of 23(μΩ・m).
R710	【Particle Size】 3μm　【Bulk Density】1.88g/cm3　【Flexural Strength】85MPa　【Thermal Conductivity】110W(m・K)　※The grade with the smallest particle size and the highest mechanical properties.
R810	【Particle Size】20μm　【Bulk Density】1.82g/cm3　【Flexural Strength】45MPa　【Thermal Conductivity】140W(m・K)　※The grade with the highest thermal conductivity.
R820	【Particle Size】20μm　【Bulk Density】1.82g/cm3　【Flexural Strength】50MPa　【Thermal Conductivity】125W(m・K)　※A grade with high oxidation resistance and thermal conductivity, featuring special porosity.
R140	【Particle Size】150μm　【Bulk Density】1.56g/cm3　【Flexural Strength】11MPa　【Thermal Conductivity】65W(m・K)　※A grade with large particle size and porous structure.