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Synthesis, Reduction, and Electrical Properties of Macroporous Monolithic Mayenite Electrides with High Porosity
ACS Omega ( IF 3.7 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1021/acsomega.7b01121 Rui Wang 1 , Hui Yang 1 , Yunhao Lu 1 , Kazuyoshi Kanamori 2 , Kazuki Nakanishi 2 , Xingzhong Guo 1
ACS Omega ( IF 3.7 ) Pub Date : 2017-11-20 00:00:00 , DOI: 10.1021/acsomega.7b01121 Rui Wang 1 , Hui Yang 1 , Yunhao Lu 1 , Kazuyoshi Kanamori 2 , Kazuki Nakanishi 2 , Xingzhong Guo 1
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Room-temperature stable macroporous mayenite electride (C12A7:e–) has been successfully prepared via a sol–gel method accompanied by phase separation, followed by heat-treatment and reduction processes. The obtained xerogel monoliths possess controllable macrostructure and a porosity of more than 60%, depending on adjusting the amount of poly(ethylene oxide) as a phase separation inducer. Heat-treatment allows the formation of multicrystals Ca12Al14O32Cl2 and Ca12Al14O33 (C12A7), and the porosity increases to 78.67% after being heat-treated at 1100 °C. Further reduction promotes the transformation from Ca12Al14O32Cl2 or C12A7 to C12A7:e– as well as the conversion from an insulator to a semiconductive electride. The carrier concentration of the electride reaches 3.029 × 1018 cm–3 after being reduced at 1100 °C under Ar atmosphere, and the porosity still remains 66%. The macrostructure of the resultant mayenite electride before and after heat-treatment and reduction is perfectly preserved, indicating that the obtained macroporous monolithic mayenite electride could be utilized in the electronic components.
中文翻译：
高孔隙率大孔整体钙铝石电极的合成，还原及电性能
室温稳定的大孔钙铝锰矿（C12A7：e –）已成功通过溶胶-凝胶法进行相分离，然后进行热处理和还原工艺制得。取决于调节作为相分离诱导剂的聚环氧乙烷的量，所获得的干凝胶整料具有可控的宏观结构和大于60％的孔隙率。热处理允许形成多晶体Ca 12 Al 14 O 32 Cl 2和Ca 12 Al 14 O 33（C12A7），并且在1100℃下热处理后，孔隙率增加至78.67％。进一步还原可促进Ca 12的转化Al 14 O 32 Cl 2或C12A7到C12A7：e –以及从绝缘体到半导体的转变。在Ar气氛下于1100°C还原后，电子载流子的载流子浓度达到3.029×10 18 cm -3，并且孔隙率仍保持66％。热处理和还原前后得到的钙铝石驻极体的宏观结构得到了很好的保留，表明所获得的大孔整体式钙铝石驻极体可以用于电子元件中。
更新日期：2017-11-20
中文翻译：
高孔隙率大孔整体钙铝石电极的合成，还原及电性能
室温稳定的大孔钙铝锰矿（C12A7：e –）已成功通过溶胶-凝胶法进行相分离，然后进行热处理和还原工艺制得。取决于调节作为相分离诱导剂的聚环氧乙烷的量，所获得的干凝胶整料具有可控的宏观结构和大于60％的孔隙率。热处理允许形成多晶体Ca 12 Al 14 O 32 Cl 2和Ca 12 Al 14 O 33（C12A7），并且在1100℃下热处理后，孔隙率增加至78.67％。进一步还原可促进Ca 12的转化Al 14 O 32 Cl 2或C12A7到C12A7：e –以及从绝缘体到半导体的转变。在Ar气氛下于1100°C还原后，电子载流子的载流子浓度达到3.029×10 18 cm -3，并且孔隙率仍保持66％。热处理和还原前后得到的钙铝石驻极体的宏观结构得到了很好的保留，表明所获得的大孔整体式钙铝石驻极体可以用于电子元件中。
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