Cryogenic temperature measuring resistor element
AssigneeOkazaki Manufacturing Company
InventorsShinichiro Saraie, Takashi Mihara, Koichi Ito
Life of this patent
Estimating the term…
Abstract
Provided is a cryogenic temperature measuring resistor element including a metallic temperature measuring resistor wire, an electric insulator made of a polycrystalline ceramic material, and a filler filled between the electric insulator and the temperature measuring resistor wire. The filler includes polycrystalline inorganic electric insulating powder, particles of the insulating powder being connected by glass. The glass has a lower softening point than respective melting points of the inorganic electric insulating powder, the temperature measuring resistor wire, and the electric insulator.
Claims6
A method for producing a cryogenic temperature measuring resistor element, comprising the steps of:
- preparing a temperature measuring resistor wire and a housing for accommodating the temperature measuring resistor wire;
- preparing a mixture of polycrystalline inorganic electric insulating powder and glass powder of an amorphous electric insulating material with each other, the glass powder having a lower softening point than respective melting temperatures of the inorganic electric insulating powder, the temperature measuring resistor wire, and the housing;
- filling the mixture between the housing and the temperature measuring resistor wire;
- heating the mixture at a temperature higher than the softening point of the glass powder and lower than the respective melting temperatures of the temperature measuring resistor wire, the housing, and the inorganic electric insulating powder so as to melt only the glass powder;
- and
- cooling the mixture so as to solidify the melted glass to connect particles of the inorganic electric insulating powder with one another.
Dependencies are inferred from the claim text.