Method for producing solid electrolyte sheet and solid electrolyte sheet
A technology of solid electrolyte and sheet, applied in the direction of solid electrolyte fuel cell, final product manufacturing, fuel cell parts, etc., can solve problems such as no implied application, no record, etc.
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[0025] (1) Preparation process of slurry
[0026] First, a slurry containing zirconia particles, a binder, a plasticizer and a dispersion medium is prepared.
[0027] Zirconia, which is a constituent component of the slurry, includes, for example: one or more alkaline earth metal oxides such as MgO, CaO, SrO, and BaO as a stabilizer; Y 2 o 3 , La 2 o 3 , CeO 2 、Pr 2 o 3 、Nd 2 o 3 、Sm 2 o 3 、Eu 2 o 3 、Gd 2 o 3 , Tb 2 o 3 、Dy 2 o 3 、Ho 2 o 3 、Er 2 o 3 , Yb 2 o 3 Oxides of rare earth elements; 5c 2 o 3 、 Bi 2 o 3 、In 2 o 3 Zirconia and other oxides. In addition, as other additives, SiO may also be contained 2 、 Ge 2 o 3 , B 2 o 3 , SnO 2 、 Ta 2 o 5 , Nb 2 o 5 Wait.
[0028] Among them, in order to ensure higher levels of strength and toughness, stabilized zirconia containing an oxide of at least one element selected from scandium, yttrium, and ytterbium as a stabilizer is preferable. More preferably, tetragonal zirconia containing oxides ...
Embodiment 1
[0128] 100 parts by mass of 3.0 mol% yttrium trioxide stabilized zirconia powder (manufactured by Sumitomo Osaka Semento Co., Ltd., trade name "OZC-3Y"); 0.5 parts by mass of alumina powder (manufactured by Showa Denko Corporation, trade name "AL -160SG"); 14 parts by mass of methacrylate adhesive (number average molecular weight: 30,000, glass transition temperature: -8°C); 2 parts by mass of adipic acid polyester as a plasticizer ( Dainippon インキ company manufactures, trade name " Polysaiza-W-320 "); 50 parts by mass of a mixed solvent of toluene / 2-propanol (mass ratio=4 / 1) as a dispersion medium, put into an oxidation chamber with a diameter of 10mm Zirconium balls in a jar mill made of nylon. A slurry for making green sheets was obtained by kneading the mixture at 50 rpm for 48 hours.
[0129] A part of the slurry was extracted, diluted with a mixed solvent of toluene / 2-propanol (mass ratio = 4 / 1), and measured by a laser diffraction particle size distribution measuring de...
Embodiment 2～6
[0133] Zirconia flakes of Examples 2 to 6 were obtained in the same manner as in Example 1 under the compositions and production conditions shown in Table 1. In addition, "xφ" in the table indicates a circle with a diameter of xmm, and "y□" indicates a square with a side length of ymm.
[0134] [Table 1]
[0135] Example
[0136] Table 2 shows the results of measuring properties such as the fracture toughness values of Examples 1-6.
[0137] [Table 2]
[0138] Example
[0139] As shown by the above results, the solid electrolyte sheet manufactured by the method of the present invention has excellent properties such as fracture toughness.
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