TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Condition: The temperature A is 110-150degreesC. The temperature B is less than 80degreesC. The temperature C is room temperature.Preferred Mixture: The mixture A comprises 40-60 volume% (vol.%) of sinterable particulate solids consisting of particle size distribution of yttria-stabilized zirconia and 60-40 vol.% of organic sacrificial binder. The mixture B comprises mixture A and sacrificial binder diluted in 40-70 weight% (wt.%) of toluene.Preferred Process: The mixtures (A,B) are heated at 250degreesC at the rate of 10degreesC/minute, at 500degreesC at the rate of 20degreesC/min, at 650degreesC at the rate of 10degreesC/min and at 1350-1550degreesC for 15-600 min. The mixture A is extruded from an extruder (116) having several tubes with outside diameter of less than 1 cm, to form supportable members. The bubbles of the mixture B have viscosity of 50-1000 mPa/second when forming bubble surfaces. The space between faces of the bubble is determined by average diameter of the tubes multiplied by 1-30. The semi-solid of the extruded membranes and the bubbles, has viscosity of 1000-100000 mPa-sec. The solid of cooled extruded membranes and cooled bubbles, has viscosity of 1000-1000000 mPa-sec. The method further involves providing inner and outer walls of each extruded membranes, applying anode slurry comprising nickel-yttria-stabilized zirconia cermet to the inner wall of each membrane, raising temperature to 1550degreesC for 15-600 minutes and cooling the inner wall. Then cathode slurry comprising La0.85Sr0.15MnO3 and yttria-stabilized zirconia is applied to outer wall of each extruded membrane, the temperature is raised to 1350degreesC for 15-600 minutes, and the outer walls of each membrane are cooled.    TECHNOLOGY FOCUS - POLYMERS - Preferred Binder: The sacrificial binder consists of(a) a thermoplastic block copolymer component which is linear, radial and/or linear and radial block copolymers,(b) two oils having different initial boiling points,(c) two waxes having different initial boiling points,(d) a first stiffening thermoplastic polymer,(e) a second stiffening thermoplastic polymer and(f) a processing aid comprising ester of fatty acid.The block copolymers of (a) has first aromatic block which is glassy or crystalline at 20-25degreesC and which has softening point of 80-250degreesC, and a second aliphatic block which is different from the first aromatic block, and behaves as an elastomer at 15-100degreesC above the softening point of the first block. The two oils of (b) is selected from group which consists of at least 75 wt.% of oils which boils at 285-560degreesC and which has viscosity of 30-220 Saybolt Universal Seconds (SUS) at 100degreesC and an aniline point at 75-125degreesC. The two waxes of (c) is selected from group which consists of wax melting at 55-80degreesC, and at least 75 wt.% of which boils at 315-490degreesC. The polymers of (d) and (e) are glassy or crystalline at 20-25degreesC and have softening point at 80-250degreesC, and comprise aromatic monomeric units associated with block copolymer (a). The weight of (a) is greater than (b) and (c) combined, greater than (d) and (e) combined and greater than about two times (b), (c), (d), (e) or (f) alone. The order of mixing is block copolymer (a), sinterable particulate, waxes (c), stiffening agents (d) and (e), oils (b) and processing aids (f). EXAMPLE - Mixture comprising 9.6 g Calprene, 1.4 g Styron 495R, 2 g Paraffin wax 32721-2, 2 g Paraffin wax 31765-9, 1.4 g Picco 5140 hydrocarbon resin, 2 g Flexon 845, 3.4 g Shellflex 371, 1 g AgeRite resin D and 44 g yttria-stabilized zirconia was extruded at 130degreesC. 19 tubes of diameter each 2 mm O.D. and 0.2 mm wall thickness were extruded in a hexagonal pattern. Bubble surfaces were formed from a mixture comprising 9.6 g Calprene, 1.4 g Styron 495R, 2 g Paraffin wax 32721-2, 2 g Paraffin wax 31765-9, 1.4 g Picco 5140 hydrocarbon resin, 2 g Flexon 845, 3.4 g Shellflex 371, 1 g AgeRite resin D and 44 g yttria-stabilized zirconia dissolved in 20 g toluene at 50degreesC. Bubbles surfaces had axial spacing of 3 cm. Toluene was evaporated from the bubble surfaces. Air access holes were obtained by poking holes through the bubbles. The assemblage was burnt to remove binder, sintered at 1500degreesC for 2 hours in air to form dense electrochemical extruded tubes which are supported mechanically by bubble surfaces. The hexagonal assembly side faces were masked, the assembly was dip coated in anode cermet precursor which adhered to the inside diameter of the dense membranes. Then top and bottom surfaces were masked and dip coated with strontium doped lanthanum manganite slurry. An electrochemical cell was formed. Hydrogen rich reformed fuel was provided to the assemblage bottom, air was flown across the holes. After reduction of NiO to Ni on the anode by the reducing gas of fuel, voltage was produced between anode and cathode.