Rare Earths: Development of New Glass
There's a new glass in town. The
glass, developed with the help of a unique NASA levitator facility, is available
for numerous commercial applications including lasers and optical
"We have patented a family of new glasses and have established processes for
making and using them in practical applications," said Dr. Richard (Rick) Weber,
director of the Glass Products Division of Containerless Research Inc., the
small company that invented and produces the glass in Evanston, Ill. "We're
already making commercial quantities of glass rods and plates for use in
lasers," he said.
REAl Glass -- made from Rare Earth oxides, Aluminum oxide and small amounts of
silicon dioxide -- has unique properties that were identified using both the
company's containerless processing techniques and a NASA ground-based research
As part of a NASA research grant for a proposed International Space Station
flight experiment, Weber conducted research in the Electrostatic Levitator at
NASA's Marshall Space Flight Center in Huntsville, Ala. The levitator, where
molten spheres of glowing material float with no visible means of support or
containment, is one of the nation's few facilities where scientists can process
materials without using contaminating containers.
"This shows how basic NASA research can lead to innovative materials and new
products that can benefit everybody," said Dr. Michael Wargo, Enterprise
Scientist for materials science in NASA's Office of Biological and Physical
Research in Washington.
Containerless Research's development of applications and new products for
lasers, optical communications, and surgical lasers is supported by grants from
the National Science Foundation and the Air Force Office of Scientific Research.
"The development of REAl Glass shows how the Small Business Innovation Research
(SBIR) program works by building on good ideas that come from basic research and
helping small businesses grow into commercial manufacturers of innovative
products," said Dr. Winslow Sargeant, who directs the National Science
Foundation SBIR Commercialization Program for devices. "We are working with
Containerless Research Inc. by supporting product research and development that
can help them grow the business and continue to create new products and new
jobs," Sargeant explained.
REAl Glassâ„˘ has qualities useful for creating materials for demanding optical
applications. "We've taken many of the best qualities of the current materials
and created a new glass that can be produced inexpensively," Weber said.
One of the most promising uses of the glass is for lasers. Whether it is a power
laser for cutting metal for car bodies or a medical laser used for surgery, the
"heart" of lasers is the gain medium, which is where REAl Glass can be used.
This critical component increases or amplifies light, resulting in an intense,
highly concentrated beam capable of precisely cutting metal parts or surgically
removing or repairing human tissue.
"Most surgical lasers now use expensive single crystals, which limit the range
of operating wavelength to very narrow bands," explained Weber. "REAl Glass
would provide tunability, which can give more control over surgical procedures,
an important factor in different types of surgery and for different skin types.
Our glass can provide efficient power lasers and expand coverage to new
wavelengths," he said.
REAl Glass also provides a medium for next-generation optical communications
devices that need to be small, low-cost and powerful to provide fiber for home
connections for broadband Internet. The company can customize the glass
composition for these uses. The family of REAl Glass materials is patented under
U.S. Patent No. 6,482,758 issued Nov. 19, 2002, and is only available from
Containerless Research Inc., or under license.
Source: NASA, Marshall Space Flight Center, Media Relations
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