| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sealing composition containing a specific phosphoric acid-tin oxide glass powder having low melting point and a low-expansion ceramics filler, free from lead and useful for improving the hydrostatic strength and thermal strength of a cathode-ray tube, plasma display panel and fluorescent display tube. SOLUTION: A sealing composition having a thermal expansion coefficient of 80×10<-7> to 110×10<-7> / deg.C between room temperature and 300 deg.C after baking is produced by compounding 50-99wt.% of a phosphoric acid-tin oxide low- melting glass powder composed of 50-72mol% (in terms of SnO) of a tin oxide, 0-10mol% of ZnO and 25-40mol% of P2 O5 with 1-50wt.% of a low-expansion ceramics filler having an average thermal expansion coefficient of 70 to 10<-7> / deg.C between room temperature and 300 deg.C. |
