| 摘要 |
A conductive material for use in interior coating of a cathode ray tube (CRT), which includes an aqueous dispersion medium containing potassium silicate and a dispersing agent; and graphite particles. The potassium silicate of the aqueous dispersion medium has a silicon dioxide (SiO2) to potassium oxide (K2O) mole ratio in the range of 4.5:1 to 6:1, and is prepared by adding hydrosilica gel to a potassium silicate aqueous solution having a SiO2 to K2O mole ratio less than 4.5:1. When the conductive material, which uses potassium silicate dispersed in an aqueous dispersion medium with a SiO2:K2O mole ratio in the range of 4.5:1 to 6:1, as a binder, is applied to form a conductive layer on the funnel of a CRT, adhesiveness of the conductive layer markedly increases. Use of the potassium silicate as a binder decreases the amount of gas released during a hot-evacuation process, and thus shortens evacuation time.
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