(US4686320-A)      Composite cermet electrode and solid electrolyte has the electrode made of beta-alumina and refractory metal. The electrode is at least 10 microns thick, and is continuously electronically conducting. It has a surface resistance of less than 30 ohms/square and is applied to the electrolyte by spraying a powder comprising the beta alumina through a source of heat to at least melt the alumina and deposit it as a coating on the electrolyte.    Pref. the refractory metal is pref. Mo, Ti, W, Nb, or Zr.    USE/ADVANTAGE -   Useful in thermoelectric generators, in which tendencies to lose power with operating time at high temps. is avoided.    (DE3686870-G)      (A)A novel composite article comprises a solid electrolyte on the surface of which is deposited an at least 10 microns thick, continuously electronically conductive, porous cermet electrode which has a surface resistance of less than 30 ohms/sq and which comprises beta alumina and refractory metal. The beta alumina is applied by spraying powder through a heat source to melt it and deposit it as a porous coating onto metal is incorporated into the electrode either together with or after depositing the beta alumina. (B) A method for making the article is also claimed.    USE/ADVANTAGE -   The article is useful for thermoelectric generator device such as sodium heat engines. The electrode is both ion and electron conductive and provides an extended region in which the charge exchange between the ions and electrons can take place, resulting in reduced interfacial impedances, greater power output per unit apparent area and higher electrode efficiency. The electrode can be deposited by flame or plasma spraying processes which are economical and rapid and allow mfr. of articles of thin cross-section and/or unusual shapes.    (JP93010420-B)      A novel composite article comprises a solid electrolyte on the surface of which is deposited on at least 10 microns thick, continuously electroconductive, porous cerment electrode which has a surface resistance of less than 30 ohms/sq and which comprises beta-alumina and refractory metal. The beta-alumina is applied by spraying powder through a heat source to melt it and deposit it as a porous coating onto metal is incorporated into the electrode either with or after depositing the beta-alumina.    A method for making the article is also claimed.    USE/ADVANTAGE -   The article is useful for thermoelectric generator device such as sodium heat engines. The electrode is both ion and electron conductive and provides an extended region in which the charge exchange between the ions and electrons can take place, resulting in reduced interfacial impedances, greater power output per unit apparant area and higher electrode efficiency. The electrode can be deposited by flame or plasma spraying processes which are economical and rapid and allow mfr. of articles of thin cross-section and/or unusual shapes. (J62177165-A)