| 摘要 |
A cathode ray tube (10) with an improved tubular glass neck member having a softening point in the range 640-650 DEG C, a strain point in the range of 420-425 DEG C, a coefficient of thermal expansion in the range of 94-97 x 10-7/ DEG C, and a linear x-ray absorption value of at least 100 cm-1 and a composition, as calculated in weight % on an oxide basis, consisting essentially of 46.5-49.5 % SiO(2), 1.5-2 % Al(2)O(3), 0.5-1.5 % Na(2)O, 10-12 % K(2)O, 2-3 % SrO, 1-1.8 % BaO, 32-34 % PbO, 1-1.5 % ZnO and a fining agent.
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