US 4,360,444 A · Getter body

Abstract

A getter body for use in encapsulated electrical components is of the type consisting of a powder mixture which has been compressed into tablet form. The powder mixture contains in addition to traditional getter material such as activated carbon, zeolite or the like, aluminum stearate and a binder containing a synthetic such as a polyamide. The getter body is produced in several sequential steps. The getter material is mixed with a polycarbonate or a water glass solution, which is then dried and then pulverized. To this first powder is added the aluminum stearate and the binder containing a synthetic. The resulting powder may then be dried and is then pressed into tablets. The tablets may then be heat-cured and are then surfaced polished. The resulting tablets have good abrasion resistance without a noticeable loss in the getter effectiveness.

Claims1

Dependent claims

In an improved getter body for use in encapsulated electrical components consisting of a compressed tablet from a powder mixture having as an active component a getter material the improvement of which comprises:

a getter body powder mixture consisting essentially of
a getter material in the amount of up to 70 percent by weight;
aluminum stearate in the amount of approximately 10 percent by weight;
and
a binder consisting essentially of polyamide and a compound selected from the group consisting of polycarbonate and potassium- and sodium-silicate solutions, said binder comprising approximately 10 percent by weight of polycarbonate or potassium- and sodium-silicate solution and approximately 90 percent by weight of polyamide.

2 more elements

Dependencies are inferred from the claim text.

Getter body

Life of this patent

Getter body

Life of this patent

Abstract

Claims1