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Contents:
Film Properties
Physical Properties of Solid Material
Evaporation Parameters
Evaporation Procedure
Applications
Forms and Sizes Available

PRASEODYMIUM OXIDE, Pr2O3 FOR OPTICAL COATING

Introduction
Praseodymium oxide, Pr2O3, produces medium-index film layers that are transparent throughout the visible region. The films are insoluble and hard.

Film Properties
Praseodymium oxide films require an electron-beam source to reach evaporation temperature. Amorphous films can be deposited below 150° C substrate temperature. Above ~300° C, the films become crystalline.

 Region of transparency  ~400 nm to ~3 µm
 Refractive index  1.75-1.8 at 400nm
1.75-1.70 at 500-700 nm

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Physical Properties of Solid Material

 Molecular Weight  329.81
 Melting Point  2200° C
 Color  Light green
 Crystal Density  7.07 g/cc

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Evaporation Parameters

 Electron beam source container  Graphite, Tungsten
 Pressure  ~5 x 10-5 Torr.
 Rate  <5 Å/sec.
 Substrate temperature  200-250° C.

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Evaporation Procedure
Keep the material in a dry atmosphere, preferably heated to reduce moisture adsorption. Precondition with a low power sweep until spitting and outgassing subside as a rate of 1Å/sec is approached (~15 min). Evaporation is by sublimation. Continue sweeping to prevent burrowing.

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Applications
The medium index value and layer hardness make praseodymium oxide suitable for the intermediate index in a wide-band visible AR coating.

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Forms and Sizes Available

 Item No.  Purity  Description
 P-1088  99.9%  3-12 mm, green sintered pieces

 Pr6011 is also available:

 P-1087

  99.9%  3-12 mm, brown sintered pieces

CERAC offers other particle sizes for evaporation as well as sputtering targets. To view pricing on the items listed above, please visit our on-line catalog and look-up by item number or chemical name. If you require a custom manufactured item, please contact our sales department at 414-289-9800 or ceracsales@beminc.com with your specific requirements. You can also fill out our quotation request form.
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Phone:  414-289-9800 /  FAX: 414-289-9805  /  ceracinfo@beminc.com