Abstract: A battery cell assembly according to the present invention may comprise: a battery cell array including a plurality of battery cells; a pair of holder plates which are made of an electric insulation material, are arranged at both ends of the battery cell array to face each other, and include position fixing grids which are provided on the inner surfaces thereof, respectively, are spaced apart from each other, and fix respective positions of the plurality of battery cells; and a plurality of contact bolts made of an electroconductive material are arranged at positions corresponding to electrode terminals of the plurality of battery cells, respectively, wherein one-side ends of the contact bolts are in electric contact with the electrode terminals of the battery cells and the other-side ends thereof are disposed to protrude from the outer surfaces of the holder plates, respectively.

Abstract: The present invention relates to a zirconia/alumina composite and a manufacturing method thereof which provide a zirconia ceramic powder having a composition in a triangle composition range formed of three composition points of 92 mol % ZrO2-4 mol % Y2O3-4 mol % Nb2O5 (or Ta2O5), 89 mol % ZrO2-7 mol % Y2O3-4 mol % Nb2O5 (or Ta2O5), 86 mol % ZrO2-7 mol % Y2O3-7 mol % Nb2O5 (or Ta2O5) in a ternary system of ZrO2—Y2O3—Nb2O5 or Ta2O3 for thereby manufacturing a zirconia/alumina composite having a high strength and high toughness in a state that a low temperature degradation does not occur.