Platinum Dispersion Hardened (Pt DPH)

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Description

Pt DPH is an oxide dispersion hardened grade of pure platinum which is used in high temperature applications when the use of solid solution hardening by alloying elements such as rhodium, iridium or gold cannot be tolerated.

Los datos sobre este material han sido proporcionados por Heraeus.

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.

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Propiedades

General

PropertyTemperatureValue

Densidad

23.0 °C

21.36 g/cm³

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Mecánica

PropertyTemperatureValueComment

Dureza Vickers

23.0 °C

60 [-]

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Elongación

20.0 °C

22 %

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1200.0 °C

68 %

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1400.0 °C

53 %

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1600.0 °C

45 %

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Límite elástico Rp 0,2

20.0 °C

73 MPa

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1200.0 °C

18.5 MPa

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1400.0 °C

13.6 MPa

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1600.0 °C

9.8 MPa

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Módulo elástico

23.0 °C

37.6 GPa

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Norton Exponent

1200.0 °C

8.5 [-]

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1400.0 °C

8.3 [-]

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1600.0 °C

7 [-]

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Resistencia a la fluencia

1200.0 °C

3.3 MPa

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10,000 h (extrapolated data)

1400.0 °C

2.5 MPa

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10,000 h (extrapolated data)

1600.0 °C

1.3 MPa

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10,000 h (extrapolated data)

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Resistencia a la tracción

20.0 °C

178 MPa

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1200.0 °C

25 MPa

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1400.0 °C

15.6 MPa

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1600.0 °C

10.4 MPa

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Aplicaciones térmicas

PropertyTemperatureValue

Conductividad térmica

20.0 °C

71.5 W/(m·K)

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1200.0 °C

84.2 W/(m·K)

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1400.0 °C

85 W/(m·K)

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Temperatura de fusión

1769 °C

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Eléctrico

PropertyTemperatureValue

Resistividad eléctrica

20.0 °C

1.2E-7 Ω·m

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1200.0 °C

5.9E-7 Ω·m

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1400.0 °C

5.9E-7 Ω·m

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Technological properties

Property
Application areas

Typical applications are crucibles and other equipment for processing special optical glasses, as the alloying elements can cause an unacceptable discoloration of the glass. For similar reasons, crucibles of Pt DPH are used in the manufacture of many single crystals by the Czochralski and Bridgman processes. Particularly in periods of high rhodium prices, Pt DPH is also used as a lining for refractory components. In this case, the refractory takes on the main load-bearing function. A further application is in thermocouple thimbles for use in glass melts containing sulphur. The sulphur in the glass can react with rhodium in Pt-Rh alloys leading to the formation of a eutectic that melts at 925°C, thus destroying the thimble. In contrast, thimbles of Pt DPH can be used in similar environments at temperatures exceeding 1200°C.