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Researchers of Shanghai Institute of
Optical and Machinery under the Chinese Academy of Sciences
have achieved a substantive progress in growing large sized
sapphire crystal through the socalled temperature gradient
technique (TGT), a panted technique. The said sapphire
crystal has a size large than 4 inches with its all four key
performance indicators reaching the internationally advanced
level.
The said technique has
virtually landed a breakthrough in
growing sapphire crystal,
an internationally acknowledged technical puzzle and laid a
fine foundation for the commercial production of large sized
sapphire crystals. The comprehensive testing made by the
California Institute of Technology has shown that the four
technical performance indicators of the sapphire crystal
grown under the temperature gradient technique were better
than that produced through thermal exchange process in the
US, reached an internationally advanced
level.
The Institute has started the mass
production of sapphire crystals and is planning to build a
2— inch sapphire crystal underlay production line, the
first of its kind in the country and another 3 — inch
sapphire crystal underlay production line, the first of its
kind in the world. The successful
industrialization of sapphire crystal production will make
the products available for export to Japan, US, Germany and
other countries.
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