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    • 2. 发明申请
    • モールド成形用光学ガラス
    • 适用于模具成型的光学玻璃
    • WO2003037813A1
    • 2003-05-08
    • PCT/JP2002/011240
    • 2002-10-29
    • 株式会社住田光学ガラス大塚 正明沢登 成人永濱 忍
    • 大塚 正明沢登 成人永濱 忍
    • C03C3/247
    • C03C3/247
    • An optical glass suitable for mold forming which has a metal composition in wt % in terms of metal oxides calculated from the composition of the components used as materials: P2O5: 34 to 50 %, Li2O: 2 to 9 %, Na2O: 7 to 28 %, K2O: 3 to 27 %, provided that the total of R2O R: Li, Na or K is 17 to 41 %, Al2O3: 6.5 to 30 %, ZnO: 0 to 22 %, BaO: 0 to 21 %, SrO: 0 to 18 %, CaO: 0 to 16 %, MgO: 0 to 14 %, provided that the total of R'O R: Zn, Ba, Sr, Ca or Mg is 0 to 34 %, and ZrO2: 0 to 1.5 %, and contains F in an amount of 1.5 to 32 wt % relative to the total weight of the above oxides, and exhibits a glass transition temperature Tg of 350°C or lower and a specific gravity Sg. of 3.1 or less and is excellent in chemical durability. The optical glass suitable for mold forming can be subjected to press forming at a low temperature of ca. 270 to 400°C and exhibits excellent durability.
    • 适用于模具成型的光学玻璃,其以由用作材料的组分组成计算的金属氧化物的重量%为重量%:P 2 O 5:34至50%,Li 2 O:2至9%,Na 2 O:7至28 %,K2O:3〜27%,条件是R2O R:Li,Na或K的合计为17〜41%,Al 2 O 3:6.5〜30%,ZnO:0〜22%,BaO:0〜21% :0〜18%,CaO:0〜16%,MgO:0〜14%,条件是R'O R:Zn,Ba,Sr,Ca或Mg的总和为0〜34%,ZrO 2:0〜 1.5%,相对于上述氧化物的总重量,含有1.5〜32重量%的F,玻璃化转变温度Tg为350℃以下,比重为Sg。 为3.1以下,化学耐久性优异。 适用于成型的光学玻璃可以在约低温下进行压制成型。 270〜400℃,耐久性好。