Production method of ring-shaped vacuum suction element without metal bottom bracket
A vacuum suction, metal-free technology, applied in the manufacture of electrical components, discharge tubes/lamps, cold cathodes, etc., to achieve the effects of increased net content, simple preparation process, and easy control of activation temperature
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Embodiment 1
[0023] Add 20g of Canadian gum to 1000ml of absolute ethanol to completely dissolve the Canadian gum in absolute alcohol to make a binder solution. Slowly pour the binder solution into the prepared 43 μm getter powder and mix until uniform. The ratio of getter powder to binder is 7:3 by volume. The getter powder mixed with the binder is granulated. After granulation, the particle size composition of the powder is 10% for 310μm, 20% for 254μm, 20% for 210μm, and 127μm for each volume ratio. 30%, 106μm accounted for 20%. The spherical powder with this particle size composition was baked at 40° C. for 3 h under the protection of Ar gas to dry the spherical powder.
[0024] The dried getter particles are press-molded in a ring mold to form a ring-shaped blank with a molding pressure of 0.8T / cm 2 , remove the binder from the press-formed ring blank in a vacuum state, the vacuum degree is 5×10 -3 Pa, the temperature is 650°C, and the holding time is 30 minutes. Sinter the annul...
Embodiment 2
[0026] Add 50g of Canadian gum to 1000ml of absolute ethanol to completely dissolve the Canadian gum in absolute alcohol to make a binder solution. Slowly pour the binder solution into the prepared 43 μm getter powder and mix until uniform. The ratio of getter powder to binder is 9:1 by volume. The getter powder mixed with the binder is granulated. After granulation, the particle size composition of the powder is 10% for 310μm, 20% for 254μm, 20% for 210μm, and 127μm for each volume ratio. 30%, 106μm accounted for 20%. The spherical powder with this particle size composition was baked at 40° C. for 3 h under the protection of Ar gas to dry the spherical powder.
[0027] The dried getter particles are press-molded in a ring mold to form a ring-shaped blank with a molding pressure of 0.8T / cm 2 , remove the binder from the press-formed ring blank in a vacuum state, the vacuum degree is 5×10 -3 Pa, the temperature is 650°C, and the holding time is 30 minutes. Sinter the annul...
Embodiment 3
[0029] Add 25g of Canadian gum to 1000ml of absolute ethanol to completely dissolve the Canadian gum in absolute alcohol to make a binder solution. Slowly pour the binder solution into the prepared 43 μm getter powder and mix until uniform. The ratio of getter powder to binder is 8:2 by volume. The getter powder mixed with the binder is granulated. After granulation, the particle size composition of the powder is 20% of 310μm, 25% of 254μm, 25% of 210μm and 127μm according to the volume ratio of various particle sizes. 20%, 106μm accounted for 10%. The spherical powder with this particle size composition was baked at 40° C. for 3 h under the protection of Ar gas to dry the spherical powder.
[0030] The dried getter particles are press-molded in a ring mold to form a ring-shaped blank with a molding pressure of 0.8T / cm 2 , remove the binder from the press-formed ring blank in a vacuum state, the vacuum degree is 5×10 -3 Pa, the temperature is 650°C, and the holding time is...
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