掺杂膨胀石墨的红外遮蔽性能

摘要

The expandable graphite prepared by chemical oxidizing process was mixed with CuO and Fe3O4, respectively,and then expanded at 900 ℃.The expanded volumes of the doped exfoliated graphite (EGs) were tested,and the IR screening characteristics of the doped EGs were tested by a static screening testing system.Results show that the expanded volume of CuO doped EG decreases from 245 mL · g-1 to 130 mL · g-1 ,and the correspongding shielding efficiency decreases from 78.4％ to 48.3％.The expanded volume of Fe3O4 doped EG decreases to 190 mL · g-1 ,and its shielding efficiency decreases to 73.7％.The IR shielding efficiencies of the two doped EGs are both inferior to that of the EG.%采用化学氧化法制备了可膨胀石墨,并将其分别与CuO、Fe<,3>O<,4>混合、高温(900℃)膨胀,得到了掺杂膨胀石墨;测试掺杂膨胀石墨的膨胀体积,并用静态测试方法对比测试了掺杂膨胀石墨的遮蔽率.结果发现,掺杂CuO膨胀石墨的膨胀体积从不掺杂膨胀石墨的245 mL·g<'-1>下降到130 mL·g<'-1>,相应的遮蔽率从78.4%下降到48.3%.而掺杂Fe<,3>O<,4>的膨胀石墨的膨胀体积下降到190 mL·g<'-1>,遮蔽率下降到73.7%.两种掺杂膨胀石墨的红外遮蔽效果均比不掺杂的膨胀石墨差.