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    PHOTOSENSITIVE GLASSES
    52.
    发明专利
    PHOTOSENSITIVE GLASSES 未知

    公开(公告)号：CA1103973A

    公开(公告)日：1981-06-30

    申请号：CA290516

    申请日：1977-11-09

    Applicant: CORNING GLASS WORKS

    Inventor： PIERSON JOSEPH E ,  STOOKEY STANLEY D

    IPC: C03C3/085 ,  C03C3/112 ,  C03C4/04 ,  C03C15/00

    Abstract: Pierson-Stockey 8-63 PHOTOSENSITIVE GLASSES This invention is concerned with the preparation of glass articles wherein a portion thereof is opaque and another portion thereof is transparent and, optionally, integrally colored. The opaque portion is produced through the thermal reduction and precipitation of a controlled number of submicroscopic particles of at least one metal selected from the group of copper, gold, palladium, platinum, and silver with the subsequent nucleation and growth of NaF crystals on said metal particles to a size sufficient to scatter visible light. The transparent portion is developed through the photoreduction of at least one photosensitive metal selected from the group of copper, gold, and silver to produce additional submicroscopic particles of said metals upon which NaF crystals are nucleated and grown, but which remain in a size too small to scatter visible light. The presence of copper or gold alone gives rise to a single color, whereas the inclusion of silver permits a full spectrum of colors to be produced. Where silver is present, microcrystals of NaF containing a silver halide selected from the group of AgCl, AgBr, and AgI are grown upon which a coating of metallic silver is developed or within which metallic silver is deposited. The method involves sequences of exposures of the glass to high energy or actinic radiation followed by heat treatments.

    57.
    发明专利
    未知

    公开(公告)号：DE1154903B

    公开(公告)日：1963-09-26

    申请号：DEC0020345

    申请日：1959-12-14

    Applicant: CORNING GLASS WORKS

    Inventor： STOOKEY STANLEY D

    IPC: C03C10/00 ,  C03C10/16

    Abstract: 863,776. Ceramic glass. CORNING GLASS WORKS. Dec. 7, 1959 [Dec. 15, 1958], No. 41536 /59. Class 56. A semi-crystalline ceramic body with a high thermal expansion coefficient is made by heat treating a glass body comprising, by weight percentages, SiO 2 85-92 ; Na 2 O + K 2 O 6À5-15; Al 2 O 3 0-8; F 0-5; the total SiO 2 , Na 2 O and K 2 O amounting to at least 92%, by heating it between 650‹C. and 1250‹C. until its linear thermal expansion coefficient measured between 0‹C. and 300‹C. has increased to above 175 x 10 -7 per ‹C. Preferably the F content is 3-5% and a small amount of As 2 O 3 is used as a fining agent. A number of examples are given.

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