Rubalit® 708 D

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Description

Rubalit® 708D is a highly dense technical oxide ceramic material that can be determined by characteristics of hardness and high strength in combination with that of temperature stability. High corrosion against and wear resistance defines the material for excellent usage in various chemical applications.

Los datos sobre este material han sido proporcionados por CeramTec.

A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

Ashby charts

Propiedades

General

PropertyValueComment

Absorción de agua

0.1 %

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Densidad

3.73 g/cm³

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Rugosidad superficial

0.8 μm

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as fired surface

Mecánica

PropertyValueTesting StandardComment

Resistencia a la flexión

300 MPa

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DR sigma 0

0.63-1.00 mm thickness | rings 6 / 12 mm

Aplicaciones térmicas

PropertyTemperatureValueComment

Calor específico

20 °C

0.7 J/(kg·K)

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100 °C

0.9 J/(kg·K)

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Conductividad térmica

20 °C

22 W/(m·K)

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

Eléctrico

PropertyTemperatureValueFrequencyComment

Constante dieléctrica

8.3 - 11.3 [-]

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1 GHz, 10 MHz, 100 MHz

2mm thickness | Ra ≤ 0.4μm

Factor de disipación

0.01 [-]

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1 GHz, 10 MHz, 100 MHz

max. | 2mm thickness | Ra ≤ 0.4μm

Resistividad eléctrica

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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Technological properties

Property
Application areas

CeramTec uses Rubalit® alumina ceramics for CeramCore cores for metal-oxide, carbon-film, metal-layered, thin-film and wire-wound resistors.

The fine structures of Rubalit® 600, 702 und 708 play a vital role in delivering very high and consistent surface quality. Using Rubalit® 600, 702 und 708 as core materials help create resistors with a lower noise factor and more stable resistance, increases resistance against electrical shock loads and improves reliability in laser trimming. This makes it possible to achieve higher integration density while simultaneously ensuring higher power density.

CeramTec boasts decades of manufacturing experience, enabling the company to produce ceramic parts for passive components with tight dimensional tolerances while delivering very high surface quality even for large-scale production with quantities ranging in the billions.

Chemical composition

The material main component is Al₂O₃ with 95.8% content. Residue mainly consists of MgO, SiO2 and CaO and traces of other elements.