Process and device for continuous production of porous structures
A microporous structure, porous metal technology, applied in lighting and heating equipment, chemical instruments and methods, furnaces, etc., can solve problems such as explosions, high metal particles, and high prices
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Embodiment I
[0058] Example I: Conversion of Nickel Oxide Green Strips to Thin Expanded Metal Sheets
[0059] A green strip containing nickel oxide particles is converted into a thin porous nickel alloy sheet in a continuous tunnel flow reactor. The green tape thickness was about 70 μm, and the composition is listed in Table 1. Such as Figure 9A As shown, the thin green tape 900 is flexible enough to wrap around a roll 902 . The green tape 900 was cut into 35 cm x 35 cm coupons and set on a durable substrate processed in a tunnel flow reactor or an environmentally controlled tunnel oven. The tunnel furnace temperature is maintained by using a number of independently controlled electric heaters along the length of the furnace. Figure 10 shows the temperature profiles of the three sections. In the preheating section (Fig. 10a), the temperature was gradually increased to 400°C through nine heating zones. In the reaction zone, the temperature was raised from 400°C to 810°C in six heating...
Embodiment II
[0065] Example II: Sintering of Microporous Ceramic Coatings on Porous Metal Sheet Supports
[0066] Two porous nickel alloy plates (49 ± 1.6 μm and 47 ± 1.3 μm thick, respectively) produced by a continuous hydrogen furnace were used as the support structure 504. They were cut into 3.5 cm × 5.5 cm specimens to prepare porous ceramics, A membrane with pores smaller than the support. The ceramic particles were coated over a 3.0 cm x 5.0 cm area of the coupon by vacuum filtering the coating slurry. The ceramic particles used for the first coat were yttria stabilized zirconia (YSZ) with an average particle size of 200 nm. The YSZ particles were impregnated with 1.1 wt% nickel oxide as a sintering accelerator. The first coating slurry contained 0.5% by weight 200 nm YSZ solids, 0.013% organic dispersant, and 0.013% organic binder, distributed in isopropanol solvent. The slurry volumes used for the first coat are listed in Table 3. Completely cover the metal surface with the f...
Embodiment III
[0072] Example III: Formation of Microporous Carbon Coatings on Thin Metal Sheet Based Supports
[0073] The carbon precursor was coated on a porous nickel sheet support by vacuum filtration. The coating and loading densities of the four samples are listed in Table 4. Cut the support sheet into 3.5 cm x 5.5 cm test pieces. Coatings were deposited on samples of 3 cm x 5 cm area. In the first two samples, a solution of phenol-formaldehyde thermosetting (PFT) resin in ethanol was used. A 50nm / 200nm YSZ-coated porous nickel sheet was used for sample 1, and a porous nickel sheet with a thickness of about 50 μm was used for sample 2 to observe the influence of the support surface on the formation of the microporous carbon film. A solution of phenol-formaldehyde thermoplastic resin (PFTP) in ethanol was used for samples 3 and 4. The support used for Sample 3 was a porous nickel sheet grown with a NaA-type zeolite membrane, and a nickel sheet was used as a support for Sample 4 for...
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