▎ 摘　　要

NOVELTY - Toughened silicon carbide (SiC) ceramic material comprises e.g. wood block samples (10 mmx 10 mmx 50 mm), silicon powder, aluminum sulfate, sodium sulfate, cerium(IV) oxide, graphene oxide, alum, sodium silicate, sodium alginate, flake-form aluminum oxide, yttrium(III) oxide, zirconium dioxide, boron carbide, polyvinyl alcohol, lanthanum nitrate, barium nitrate, citric acid, potassium ferrate, manganese sulfate, and hydrochloric acid, sulfuric acid, distilled water, and ethanol (balance). USE - The ceramic material is useful for purifying vehicle exhaust (claimed). DETAILED DESCRIPTION - Toughened silicon carbide (SiC) ceramic material comprises 26-38 pts. wt. wood block samples (10 mmx 10 mmx 50 mm), 8-15 pts. wt. silicon powder, 10-18 pts. wt. aluminum sulfate, 6-10 pts. wt. sodium sulfate, 6-8 pts. wt. cerium(IV) oxide, 6-9 pts. wt. graphene oxide, 1-2 pts. wt. alum, 1-2 pts. wt. sodium silicate, 1-3 pts. wt. sodium alginate, 2-4 pts. wt. flake-form aluminum oxide, 2-6 pts. wt. yttrium(III) oxide, 1-5 pts. wt. zirconium dioxide, 1-2 pts. wt. boron carbide, 1-3 pts. wt. polyvinyl alcohol, 4-7 pts. wt. lanthanum nitrate, 3-6 pts. wt. barium nitrate, 1-4 pts. wt. citric acid, 2-4 pts. wt. potassium ferrate, and 2-6 pts. wt. manganese sulfate, and hydrochloric acid, sulfuric acid, distilled water, and ethanol (balance). An INDEPENDENT CLAIM is also included for preparation of the toughened silicon carbide ceramic automobile exhaust gas purification material comprising (a) using the wood sample, drying at 100-120 degrees C for 20-24 h, then pyrolyzing for 4-6 hours under the protection of nitrogen flow of 800-900 degrees C to obtain porous carbon sample, then placing in hydrochloric acid solution for cleaning, (b) mixing the cerium(IV) oxide and graphene oxide under ultrasonic for 30-50 minutes, adding obtained in a material, alum, sodium silicate, sodium alginate, magnetic stirring for 2-3 hours, adding the mixture in the reaction kettle to 140-150 degrees C constant temperature for 5-8 hours, then naturally cooling to room temperature, centrifugally separating, water washing and alcohol washing, then drying at 60-80 degrees C for 10-12 hours in vacuum to obtain the platinum-cerium(IV) oxide/graphene electro-catalyst, grapheme catalyst enriched carbon sample; (c) using the obtained grinded material in the silicon powder, heating at 1400-1600 degrees C for 1-2 hours, partially forming the SiC in a nitrogen atmosphere, cooling to room temperature, to obtain enriched catalyst with porous SiC ceramic powder; (d) us the flaky-alumina, zirconium dioxide, boron carbide, yttrium(III) oxide, and polyvinyl alcohol into the SiC powder, adding solvent ethanol, carrying out wet ball milling for 2-4 hours, drying at 50-70 degrees C, grinding and crushing, curing at 100-300 degrees C, and then sintering at 1700-2100 degrees C for 1-3 hours to obtain the toughened SiC ceramic; (e) using the lanthanum nitrate, strontium nitrate and citric acid in the water, mixing uniformly, heating to 90-180 degrees C evaporating water under the protection of nitrogen, heating to 380-420 degrees C for 40-50 minutes, calcining at constant temperature for 2-4 hours, naturally cooling to room temperature, crushing and obtaining the rare earth perovskite type catalyst; (f) mixing the potassium ferrate with manganese sulfate, adding sulfuric acid to regulate pH of the solution to 1-2, carrying out hydro-thermal reaction at 100-160 degrees C for 8-10 hours, filtering the obtained product, washing and drying to obtain the iron-doped manganese oxide catalyst, and (g) using the material obtained in step (d) is laid on the bottom of alumina crucible, covering with ground aluminum sulfate/sodium sulfate mixed powder, and then adding the samples obtained in the step (e) and (f), and then heating in the muffle furnace until 800-900 degrees C, heat preservation for 2-4 hours, naturally cooling to room temperature to obtain the catalyst-rich ceramic powder, namely a toughened SiC ceramic material for purifying vehicle exhaust.