Mercury dispensing device

• US 5,916,479 A
• Filed: 08/26/1997
• Issued: 06/29/1999
• Est. Priority Date: 07/07/1994
• Status: Expired due to Fees

• Current Assignee: SAES Getters SpA (SAES Getters S)
• Original Assignee: SAES Getters SpA (SAES Getters S)
• Inventors: Schiabel, Antonio, Boffito, Claudio
• Primary Examiner(s): OEN, WILLIAM L
• Application Number:
  US08/918,331
• Time in Patent Office: 672 Days
• Field of Search: 252/181.3, 252/181.6, 445/9, 445/16, 445/19, 313/550, 313/556, 313/558, 313/561, 313/631
• US Class Current: 252/181.3
• CPC Class Codes: B22F 1/12 Metallic powder containing non-metallic particles containing lubricating or binding agents or organic material B22F1/10
• CPC Class Codes: H01J 61/24 Means for obtaining or maintaining the desired pressure within the vessel
• CPC Class Codes: H01J 61/72 having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
• CPC Class Codes: H01J 7/10 mercury vapour
• CPC Class Codes: H01J 7/14 Means for obtaining or maintaining the desired pressure within the vessel
• CPC Class Codes: H01J 9/395 Filling vessels

Abstract

A mercury-dispensing device is disclosed that includes a mercury dispenser having the formula Ti_x Zr_y Hg_z in which x and y are between 0 and 13, inclusive, the quantity x+y is between 3 and 13, inclusive, and z is 1 or 2; and a promoter that comprises copper, silicon and possibly a third metal selected among the transition elements. A getter material selected among titanium, zirconium, tantalum, niobium, vanadium and mixtures thereof, and alloys of these metals with nickel, iron or aluminum can be included in the device. The mercury dispense, promoter and optional getter material are provided preferably in the form of powders compressed as a pellet, or contained in a ring-shaped metallic support or rolled on the surfaces of a metallic strip. Also disclosed is a process for introducing mercury into electron tubes by making use of the above-mentioned mercury-dispensing devices.

Claims

1. A mercury-dispensing device comprising a mercury-dispensing composition comprising:

a) a mercury dispenser having the formula Ti_x Zr_y Hg_z wherein

i) x and y are between 0 and 13, inclusive,

ii) the quantity x+y is between 3 and 13, inclusive, and

iii) z is 1 or 2; and

b) a promoter comprising an alloy of Cu and Si having an amount of Cu between about 80% by weight and about 98% by weight.

2. The mercury-dispensing device of claim 1, further including a getter material.

3. The mercury-dispensing device of claim 2, wherein said getter material selected from the group consisting of titanium, zirconium, tantalum, niobium, vanadium and mixtures thereof, and alloys of these metals with nickel, iron or aluminum.

4. The mercury-dispensing device of claim 3, wherein said mercury dispenser is Ti₃ Hg, said promoter is a Cu--Si alloy containing 90% Cu by weight, and said getter material is a Zr--Al alloy having 84% Zr by weight.

5. An electron tube comprising the mercury-dispensing device of claim 1.

6. The electron tube of claim 5 which is a fluorescent lamp.