Rubalit® 708S C

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Description

Rubalit® 708S C is characterized by its extremely high strength and thermal conductivity. The outstanding surface quality on both sides makes it the perfect companion for any commercial thick film paste and even makes it suitable for a number of thin film applications (sputtering).

This material data has been provided by CeramTec.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyValueComment

Density

3.73 g/cm³

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Surface roughness

0.6 μm

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as fired surface

Water absorption

0.1 %

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Mechanical

PropertyValueTesting StandardComment

Flexural strength

450 MPa

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DR sigma 0

0.63 mm thickness | rings 6 / 12 mm

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

6e-06 - 8e-06 1/K

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100-200°C

6e-06 - 8e-06 1/K

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100-300°C

6.7e-06 - 8.7e-06 1/K

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100-600°C

7e-06 - 9e-06 1/K

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100-800°C

Specific heat capacity

20 °C

0.7 J/(kg·K)

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100 °C

0.7 J/(kg·K)

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Thermal conductivity

20 °C

22 W/(m·K)

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Xe-flash | sample 16*16mm² | material specific thickness ≤ 3.5mm

Electrical

PropertyTemperatureValueFrequencyComment

Dielectric constant

8.3 - 11.3 [-]

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1 GHz, 10 MHz, 100 MHz

2mm thickness | Ra ≤ 0.4μm

Dielectric strength

15 kV/mm

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min. | 0.635 mm thickness

Dissipation factor

0.01 [-]

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1 GHz, 10 MHz, 100 MHz

max. | 2mm thickness | Ra ≤ 0.4μm

Electrical resistivity

20 °C

1e+11 Ω·m

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200 °C

1e+09 Ω·m

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400 °C

1e+07 Ω·m

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600 °C

100000 Ω·m

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800 °C

100000 Ω·m

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Technological properties

Property
Application areas

This ceramic material is characterized by its extremely high strength and thermal conductivity. The outstanding surface quality on both sides makes it the perfect companion for any commercial thick film paste and even makes it suitable for a number of thin film applications (sputtering).

Chemical composition

The material main component is Al₂O₃ with 96% content. Residue mainly consists of MgO, SiO2 and CaO and traces of other elements.