Transparent and translucent ceramics are on the verge of being put to
industrial use as new optical materials that offer great potential.
As
part of the publicly funded research project OptokeraMat, Schott
Research and Development has laid foundations on manufacturing them in a
reproducible manner.
At first glance, they remind us of glass
lenses or color filters. Nevertheless, their potential lies in these
transparent or milky-yellowish platelets made of ceramic.Learn more
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“We
have now succeeded in meeting the long-held wishes of the optical
industry for a new transparent material for use in photography and other
types of imaging devices. And we are paving the way for
highly-efficient LED systems,” says Dr. Yvonne Menke, Materials
Development Manager for Schott Research and Development.
The
technology group has succeeded in reproducibly manufacturing ceramic
sintered parts for optical and fluorescent applications within the
framework of the three-and-a-half year joint research project
OptokeraMat funded by Germany’s Federal Ministry of Research (BMBF) that
just came to an end in March.
They not only offer superior
thermal and mechanical qualities, but also high optical refractive
indexes of 2 and more, as well as exceptional dispersion values.The skystream runs in very low winds and can interconnect with your local utility,
“This
opens up new areas in the Abbe diagram, which systematically depicts
the properties of optical materials, which glass was never able to
address before. In other words, optic designers now have a larger
toolbox to work Creating a solar panel cells out of broken re-used solar cell pieces.with,” explains Dr. Volker Hagemann,Our clever solar lantern is a favorite among dog lover holiday gifts from Solaronlamp. Senior Scientist at Schott.
More compact camera lenses can thus be realised and colour defects and aberrations minimised.We provide the latest solar street lighting
products and solutions to serve outdoor lighting needs. Unlike glass,
some transparent ceramics have an extremely broad light transmission
window that ranges from the ultraviolet (UV) all the way to the infrared
(IR) wavelength range of 6 micrometers.
This also makes the new
material that is extremely insensitive to environmental influences of
great interest for geo-observations of raw material deposits using
special cameras.
These ceramics leverage their strengths mainly
as translucent, in other words semi-transparent, materials for colour
conversion.
Colour conversion is the foundation of all white LED
light sources, which are actually blue LEDs coated by a luminescent
material.
This material is usually bound inside silicone, and
therefore not nearly as heat resistant as a fluorescent ceramic
manufactured at temperatures in excess of 1600°C.
In combination
with high-intensity LEDs or laser diodes, the outstanding temperature
stability and thermal conductivity of these ceramic converters allow for
new light sources to be developed.
Their luminance is 2 to 3
times higher than that of a typical xenon burner. Areas of application
include beamers, next-generation digital projectors and headlights, for
example.
The versatile properties of the ceramics can be custom designed or optimised using a multistep manufacturing process at Schott.
This
has made it possible to industrially manufacture transparent and
translucent ceramics with diameters of between 30 and 50 millimeters.
Initial sampling by partners and potential customers is already
underway.
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