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1.发明授权Glass fiber forming composition, glass fibers obtained from the composition and substrate for circuit board including the glass fibers as reinforcing material 失效玻璃纤维形成组合物，由组合物获得的玻璃纤维和用于电路板的基板，包括玻璃纤维作为增强材料
公开(公告)号：US5284807A
公开(公告)日：1994-02-08
申请号：US832267
申请日：1992-02-07
CPC分类号： C03C3/097 , C03C13/00 , C03C3/091 , C03C3/102 , H05K1/0326 , H05K1/0366 , H05K1/0373 , H05K2201/0116 , H05K2201/0209
摘要： A glass fiber forming composition exhibits a remarkably high dielectric constant .epsilon..sub.r as well as superior chemical resistance, yet it is readily spun into glass fibers. The composition is characterized to show a devitrification temperature which is lower than a spinning temperature at which the glass composition exhibits a viscosity of 10.sup.2.5 poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of MgO, CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; and 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5. Alternately, the composition consist essentially of 40 to 65 mol % of SiO.sub.2 ; 20 to 45 mol % of at least one component selected from the group consisting of CaO, SrO and BaO; 5 to 25 mol % of at least one component selected from the group consisting of TiO.sub.2 and ZrO.sub.2 ; 0.5 to 15 mol % of NbO.sub.5/2 as calculated from an incorporated amount of Nb.sub.2 O.sub.5 ; and 0.5 to 15 mol % of AlO.sub.3/2 as calculated from an incorporated amount of Al.sub.2 O.sub.3. The composition is also characterized to incorporate at least 85 mol % of a total amount of the oxides and have a dielectric constant [.epsilon..sub.r ] of 9 or more at 1 MHz and 25.degree. C.
摘要翻译： 玻璃纤维形成组合物显示出非常高的介电常数（ε）r以及优异的耐化学性，但易于纺成玻璃纤维。 该组合物的特征在于显示出低于玻璃组合物的粘度为102.5泊的纺丝温度的失透温度，以便容易地纺丝成相应的玻璃纤维。 该组合物基本上由40至65mol％的SiO 2组成; 20〜45摩尔％的选自MgO，CaO，SrO和BaO的至少一种成分; 5〜25摩尔％的选自TiO 2和ZrO 2的至少一种成分; 和0.5〜15mol％的NbO 5/2，由Nb 2 O 5的掺入量计算。 或者，组合物基本上由40至65mol％的SiO 2组成; 20〜45摩尔％的选自CaO，SrO和BaO的至少一种成分; 5〜25摩尔％的选自TiO 2和ZrO 2的至少一种成分; 由Nb 2 O 5的掺入量计算的NbO 5/2为0.5〜15摩尔％ 和由Al 2 O 3的掺入量计算的0.5〜15摩尔％的AlO 3/2。 该组合物的特征还在于，在1MHz和25℃下，其总氧化物的总量至少为85mol％，并具有9或更高的介电常数（ε）r）。
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