摘要:
A cell casing and a hermetically sealed sodium-sulfur cell are disclosed wherein the cell casing includes a hermetic mechanical seal joining two opposed outer metallic casing portions to a ceramic ring supporting an inner casing of a solid sodium ion-conductive material. A hermetically sealed sodium-sulfur cell has the above type of casing with a sodium negative electrode in the inner casing and a positive electrode of sulfur in conductive material in an outer casing portion surrounding the inner casing.
摘要:
A sintered .beta.-alumina cylindrical tube of uniform shape is produced by placing the unsintered tube within a sagger, passing the sagger on friction-reducing balls through a horizontal firing tube and continuously alternately rotating the tube-containing sagger through the firing tube so that all portions of the tube therewithin experience on the average the same gravitational effect.
摘要:
A method of forming a beta-alumina article includes electrophoretically depositing such material on a mandrel, exposing the deposited material promptly to a continuous flow of warm air thereby drying the deposited material, and sintering the dried material. Alternately, the deposited material is stored in a chamber purged continuously with an inert gas until the material is dried in a flow of warm dry air. Such articles are useful as solid electrolytes in sodium-sulfur and sodium halogen batteries.
摘要:
A sintered .beta.-alumina cylindrical tube of uniform shape is produced by placing the unsintered tube within a sagger, passing the sagger on friction-reducing balls through a horizontal firing tube and rotating the tube-containing sagger through the firing tube.
摘要:
A battery casing and a sealed sodium-sulfur battery are disclosed wherein the battery casing includes separate seals of low temperature melting glass joining a portion of an inner casing of a solid sodium ion-conductive material to the interior surface of a ceramic ring, and joining two opposed outer metallic casings to the ceramic ring. A sealed sodium-sulfur battery has the above type of casing with a sodium anode in one casing and a cathode of sulfur in conductive material in the other casing.
摘要:
A composite body has a beta-alumina substrate with at least one aperture therethrough, and a glass coating covering and adhering to the entire external surface of the substrate. The glass coating has sodium resistance, low alkali ion-conductance, and a coefficient of thermal expansion of 7.3 to 6.1 .times. 10.sup.-6 inches/inch/.degree. C.
摘要:
A process for producing an hermetic feedthrough in a ceramic substrate by providing a sheet of liquid phase sinterable ceramic composition having a feedthrough hole, filling the feedthrough hole with refractory metal metallization material, firing the resulting structure to produce a sintered substrate and adherent metallization wherein the metallization is comprised of continuous phases of refractory metal and glass, contacting the refractory metal with electrically conductive intrusion metal and heating the resulting structure to a temperature at which the glassy phase is fluid, the refractory metal is solid, and the intrusion metal is liquid whereby the liquid metal preferentially wets the refractory metal, migrates into the metallization displacing glass and, upon subsequent solidification, partially or wholly occupies the volume space originally containing the continuous glass phase.
摘要:
A sodium-sulfur cell is disclosed herein along with a method of constructing its sulfur electrode. The cell includes means containing a supply of sodium, an elongated housing joined at one end with sodium containing means, a beta-alumina electrolyte tube located within and extending from the joined end of the housing so as to define a compartment within the housing around the tube. A mixture including sulfur and an electrically conductive filler is disposed within the compartment and forms the cells sulfur electrode. In constructing this electrode, sufficient space is initially provided within the cell compartment around the beta-alumina electrolyte tube to allow for expansion of the sulfur when the latter converts from its solidified state during initial storage to its molten state during operation of the cell, thereby minimizing the possibility of damage to the electrolyte tube as a result of this expansion.
摘要:
In a sodium sulfur cell including a beta-alumina separator between the sodium and sulfur compartments, high surface area gettering means, e.g., beta-alumina or beta"-alumina, for potassium and alkali earth metal ion impurities in the sodium to protect the separator. The gettering means is disposed in the sodium container in the form of particles or a continous porous shell or porous solid plug adjacent to the separator.
摘要:
Molten sodium is filled into a reservoir insert container including a closed ended tubular portion and the sodium is solidified and the container sealed. Then an open port is provided for the insert container. The container is placed into the sodium compartment of a sodium-sulfur cell so that the tubular portion extends into the electrolytic separator tube of the cell and is spaced apart therefrom forming an annular chamber. To activate the cell, the sodium is melted and flows through the open port into the annular chamber.