| 摘要 |
A GLASS COMPOSITION THAT HAS IMPROVED INFRARED ABSORPTIVITY WHILE PREVENTING THE VISIBLE LIGHT TRANSMITTANCE FROM DECREASING EXCESSIVELY. THE GLASS COMPOSITION INCLUDES: THE FOLLOWING COMPONENTS, EXPRESSED IN MASS%: 65 < SIO2 ≤ 75; 0 ≤ 5; 0 ≤ A12O3 ≤ 5; 0 ≤ MGO < 2; 10 ˂ CAO ≤ 15; 0 ≤ SRO ≤ 10; 0 ≤ BAO ≤ 10; 0 ≤ LI2O ≤ 5; 10 ≤ NA2O ≤ 15; 0 ≤ K2O ≤ 5; AND 0 ≤ TIO2 ≤ 0.5, WHERE 10 < MGO + CAO + SRO + BAO ≤ 20 AND 10 ≤ NA2O + K2O ≤ 17.5; MNO 0 TO 300 MASS PPM; AND THE FOLLOWING COMPONENTS AS COLORANTS, EXPRESSED IN MASS %: 0.4 ≤ T-FE2O3 ≤ 1.0, WHERE T-FE2O3 IS TOTAL IRON OXIDE EXPRESSED AS FE2O3;; AND 0 ≤ CEO2 ≤ 2.0. THE MASS RATIO OF FEO EXPRESSED AS FE2O3 TO T-FE2O3 IS 20 TO 44%. THE WAVELENGTH AT WHICH A MINIMUM TRANSMITTANCE IS OBTAINED IN A RANGE OF 550 TO 1700 NM IS AT LEAST 1065 NM. THE TRANSMITTANCE THAT IS OBTAINED AT A WAVELENGTH OF 1650 NM IS NOT HIGHER THAN THE TRANSMITTANCE THAT IS OBTAINED AT A WAVELENGTH OF 730 NM.
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