【摘要】 采用阴极电化学沉淀方法制备氧化铝纳米粉体,对得到的纳米粉体进行了光吸收性能测试,并对其形成机理进行了初步的探讨。利用阴离子交换膜为隔膜的电解槽,在不添加分散剂的情况下,控制阴极的电流密度在150～500 A/m²范围,电解一定浓度的硝酸铝溶液,在阴极室内得到Al（OH）₃沉淀,在500℃下焙烧2 h,得到不同粒度的Al₂O₃颗粒。用TEM和XRD分析表明：当阴极的电流密度为300 A/m²时,得到的Al₂O₃粒度尺寸在30～40nm左右,晶型为γ-Al₂O₃,对波长为370 nm左右的紫外光有一定的吸收能力。更多还原

【Abstract】 Nanometer alumina powder was made by electrochemistry deposition on cathod.The theory of its preparation was elementarily in- vestigated and its light absorption capability was tested.Aluminium hydroxide was made on cathod in the electrobath divided by anion-ex- chang membrane under the current density of 150～500 A/m² without dispersant.Different sizes of alumina particles were prepared after 2 h under the calcined condition of 500℃.The results analyzed by means of TEM and XRD showed that the crystal ofγ-Al₂O₃ was obtained un- der the current density of 300 A/m² with the size of average particles ranging from 30 nm to 40 nm which processes absorption capability for violet light at the wavelength of 370 nm or so to a certainty.更多还原