| 摘要 |
PROBLEM TO BE SOLVED: To produce the subject composition capable of sealing a panel and a funnel of a cathode-ray tube by the heat-treatment at a low temperature for a short time by adding a specific crystal powder to a composition composed of a specific low-melting glass powder and a ceramic filler having low expansion coefficient. SOLUTION: This ceramic composition is composed of a phosphate-tin oxide type crystalline low-melting glass powder consisting of 45-72mol% of tin oxide (in terms of SnO), 0-25mol% of ZnO, 25-40mol% of P2 O5 , 0-5mol% of Al2 O3 , 0-5mol% of B2 O3 , 0-10mol% of Li2 O+Na2 O+K2 O and 0-10mol% of MgO+CaO+ SrO+BaO and a ceramic filler having low expansion coefficient and preferably consisting of one or more substances selected from zircon, cordierite, alumina, mullite, silica,β-eucryptite,β-spodumene andβ-quartz solid solution. The composition is further incorporated with 1-10,000wt.ppm (based on the total amount of the composition) of a powdery crystal of a double oxide containing Sn and P.
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