NOVELTY - Layer (10) and layer (12) of green sinterable material with higher shrinkage rate and lower shrinkage rate, respectively are laminated, so that layer (12) is on one face (18) of layer (10) and extends to edge (14) of layer (10). Edge strip (16) of sinterable material with shrinkage rate lower than layer (10), is applied to opposite face of layer (10) along at least 1 edge to form green laminated structure.    USE - For planar solid fuel cells.    ADVANTAGE - The edge strip has minimum width and thickness which provides the desired performance of alleviating curling of edge portion and other undesirable effects such as cracking, delaminating and deformation of layer. The sintered laminated structure is used to form fuel cell since glass or other seal material which softens at elevated operating temperature of fuel cell, can be applied to at least one edge of the first layer and be absorbed into denser edge region with less risk of softened seal material spreading to less dense portion of first layer remote from at least one edge. The seal material may be absorbed into edge region of first layer but be prevented from spreading into core region by capillary action.    DETAILED DESCRIPTION - The green laminated structure formed with layers (10,12), is heated to form a sintered laminated structure. Layer (12) extends to all edges of layer (10) on the face and the edge strip extends to all of the edges.    After heating, the laminated structure, the edge strip is removed from sintered laminated structure.    The shrinkage rate of edge strip and layer (12) differ by at most25%, preferably at most10%. Width of edge strip is less than that of edge portion of laminated structure. The width of edge strip along one edge is at most20%, preferably 5-10% of parallel dimension of layer (10). Thickness of the edge strip is less than 25% of layer (12). The edge strip has a density of at most10% which is greater than layer (12).    The sinterable material of layer (12) is yttrium trioxide-doped zirconium dioxide and sinterable material of edge strip is ZrO2, optionally doped with Y2O3. INDEPENDENT CLAIMS are also included for the following:    (a) Green laminated structure;    (b) Fuel cell assembly for producing electricity; and    (c) Sintered laminated structure    DESCRIPTION OF DRAWING(S) - The figure shows cross-section of sintered laminated structure.    Layers (10,12)    Edge (14)    Edge strip (16)    Face (18)