发明名称 |
Glass fiber forming composition, glass fibers obtained from the composition and substrate for circuit board including the glass fibers as reinforcing material. |
摘要 |
<p>A glass fiber forming composition exhibits a remarkably high dielectric constant epsilon 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<2.5> poise, so as to be readily spun into corresponding glass fibers. The composition consists essentially of 40 to 65 mol% of SiO2; 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 TiO2 and ZrO2; and 0.5 to 15 mol% of NbO5/2 as calculated from an incorporated amount of Nb2O5. Alternately, the composition consist essentially of 40 to 65 mol% of SiO2; 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 TiO2 and ZrO2; 0.5 to 15 mol% of NbO5/2 as calculated from an incorporated amount of Nb2O5; and 0.5 to 15 mol% of AlO3/2 as calculated from an incorporated amount of Al2O3. The composition is also characterized to incorporate at least 85 mol% of a total amount of the oxides and have a dielectric constant [ epsilon r] of 9 or more at 1 MHz and 25 DEG C. <IMAGE></p> |
申请公布号 |
EP0498425(A1) |
申请公布日期 |
1992.08.12 |
申请号 |
EP19920101994 |
申请日期 |
1992.02.06 |
申请人 |
MATSUSHITA ELECTRIC WORKS, LTD.;NIPPON ELECTRIC GLASS COMPANY, LIMITED |
发明人 |
KOMORI, KIYOTAKA;YAMAKAWA, SEISHIRO;YAMAMOTO, SIGERU, 397, SHININOKUMA-CHO;NAKA, JUN;KOKUBO, TADASHI |
分类号 |
C03C13/00;H05K1/03 |
主分类号 |
C03C13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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