| 摘要 |
PROBLEM TO BE SOLVED: To obtain a glass material having a high dielectric constant and a reduced dielectric loss, and contains a low alkali component, and suitable for a substrate for an electronic circuit and a dielectric material such as a high frequency circuit element and a flat panel-display. SOLUTION: The glass has a composition containing, by mass, 5 to 25% P<SB>2</SB>O<SB>5</SB>, 0 to 15% B<SB>2</SB>O<SB>3</SB>, 0 to 5% SiO<SB>2</SB>+GeO<SB>2</SB>, 21 to 50% BaO+SrO, 0 to 3% Li<SB>2</SB>O+ Na<SB>2</SB>O+K<SB>2</SB>O and 35 to 65% Nb<SB>2</SB>O<SB>5</SB>, substantially containing no PbO components, and satisfying Nb<SB>2</SB>O<SB>5</SB>/(BaO+SrO)=0.85 to 2.20. The glass has a dielectric constant of≥15, a dielectric loss of≤10.0×10<SP>-4</SP>and an electrical resistivity of≥1.0×10<SP>16</SP>Ωcm. COPYRIGHT: (C)2003,JPO
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