2O3涂層改性的α-Al2O3泡沫。采用聚氨酯模板法，通過優(yōu)化工藝參數(shù)，使陶瓷泡沫的顯氣孔率達(dá)到90.28%，體積密度達(dá)到0.45 g·cm-3，且該泡沫具有可使用強(qiáng)度。將摻有P元素的γ-Al2O3涂層涂覆在α-Al2O3泡沫上，然后通過超聲波輔助浸漬法來裝載活性催化相（Pd）。結(jié)果表明，含P涂層增加了惰性泡沫的比表面積和弱酸性位點(diǎn)，同時(shí)減少了強(qiáng)酸性位點(diǎn)的占比。與無涂層的泡沫相比，改性的泡沫更容易裝載活性相，且裝載的金屬Pd不容易被氧化，CO的催化轉(zhuǎn)化溫度（T50，T90）降低了50 ℃左右。該研究證明了低成本改性α-Al2O3陶瓷泡沫在鈀催化劑生產(chǎn)中具有極大的應(yīng)用潛力。;A novel method for the preparation of α-alumina foams with P-γ-Al2O3 modified coating for the palladium catalysts was proposed. The polyurethane template method was used and the preparation parameters were optimized. The apparent porosity of the ceramic foam is 90.28%, the bulk density is 0.45 g·cm-3, and the strength of ceramic foam is satisfying. The P-modified γ-Al2O3 coating was prepared on the α-alumina foam, and then the active catalytic phase (Pd) was loaded by ultrasound-assisted impregnation. Results show that the P-containing coating increases the surface area and weakly acidic sites of the inert foam while decreasing the proportion of strongly acidic sites. Compared with the uncoated foam, the foam with modified coating can easily load the active phase. In addition, the loaded Pd metal can hardly be oxidized, and the catalytic conversion temperature (T50, T90) of CO reduces by about 50 °C. This research presents the great practical potential of low-cost modified α-Al2O3 ceramic foams in the palladium catalyst production."/>
2O3/α-Al2O3泡沫;鈀催化劑;P改性;高孔隙率;CO催化燃燒;γ-Al2O3/α-Al2O3 foams;palladium catalyst;P-modification;high porosity;CO catalytic combustion"/>