Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1996-02-20
1998-11-17
Group, Karl
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
501 43, 501 73, 501904, 65 321, 65 325, C03C 323, C03C 3253
Patent
active
058376283
ABSTRACT:
This patent discloses the composition of germanate glass and a new method for its fabrication. The composition comprises germanate, the oxide of an alkali earth group, Al.sub.2 O.sub.3, ZnO, a halides compound eg. CaF.sub.2, CaCl.sub.2 and so on,, and can combine with a series of oxygenous compounds such as silicate, borate, phosphate, arsenate, tellurate and so on, if required. The addition of an alkali oxide could increase the glass formation rate and homogeneity, and the defects of devitrification, cord, knot, and blister are reduced. Its fabricated methods which consist of the reduction pressure melting with the addition of a halide and the drying procedure. The germanate glass body that is made is colorless and transparent and it can increase the transmittance of infrared from 20% to greater than 60% in the wave length 2.75-3.0 .mu.m. The price of producing the germanate glass is decreased and the transmittance of this composition system increased from 5% to 80%.
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Hon Min-Hsiung
Wang Jenn-Shing
Wang Moo Chin
Group Karl
National Science Council
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