| 摘要 |
PURPOSE: A conductive material is provided to achieve improved adhesive force of conductive film formed at the inner surface of a funnel of a CRT, while shortening evacuation time and improving life span of a CRT. CONSTITUTION: A conductive material for interior of a CRT, contains graphite particles and a water dispersion medium containing potassium silicates and dispersion agent. The potassium silicate of the water dispersion medium consists of SiO2 and K2O having a mole ratio of 4.5 to 6. The potassium silicate is obtained by adding a hydro silica gel to the potassium silicate solution where SiO2 and K2O have a mole ratio of 4.5 or lower. The graphite particle is 20 to 80 weight parts, calculated in terms of a sold 100 weight parts of the conductive material, the potassium silicate is 20 to 80 weight parts, and the dispersion agent is 1 to 3 weight parts.
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