caa a22 4500 388020237 CHVBK 20180307124922.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1557/JMR.1998.0353 doi S0884291400045891 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0353 Preparation of β-SiC Nanorods with and Without Amorphous SiO2 Wrapping Layers [Elektronische Daten] Preparation of β-SiC nanorods with and without amorphous SiO2 wrapping layers was achieved by carbothermal reduction of sol-gel derived silica xerogels containing carbon nanoparticles. The β-SiC nanorods with amorphous SiO2 wrapping layers were obtained by carboreduction at 1650 °C for 1.5 h, and at the end of 1.5 h the temperature was steeply raised to 1800 °C and held for 30 min; they are typically up to 20 µm in length. The diameters of the center thinner β-SiC nanorods within the amorphous SiO2 wrapping layers are in the range 10-30 nm, while the outer diameters of the corresponding amorphous SiO2 wrapping layers are between 20 and 70 nm. The β-SiC nanorods without amorphous SiO2 wrapping layers were produced by carbothermal reduction only at 1650 °C for 2.5 h, and their diameters are in agreement with those of the center thinner β-SiC nanorods wrapped in amorphous SiO2 layers. Large quantities of SiC rod nuclei and the nanometer-sized nucleus sites on carbon nanoparticles are both favorable to the formation of much thinner β-SiC nanorods. The formation of the outer amorphous SiO2 wrapping layer is from the combination reaction of decomposed SiO vapor and O2. Copyright © Materials Research Society 1998 Meng G. W. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, and Institute of Advanced Study, University of Science and Technology of China, Hefei, Anhui 230026, China Zhang L. D. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, and Institute of Advanced Study, University of Science and Technology of China, Hefei, Anhui 230026, China Mo C. M. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China Zhang S. Y. Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China Qin Y. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, China Feng S. P. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, China Li H. J. Materials Science and Engineering College, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China Journal of Materials Research Cambridge University Press 13/9(1998-09), 2533-2538 0884-2914 13:9<2533 1998 13 JMR https://doi.org/10.1557/JMR.1998.0353 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0353 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Meng G. W. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, and Institute of Advanced Study, University of Science and Technology of China, Hefei, Anhui 230026, China NATIONALLICENCE 700 1- Zhang L. D. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, and Institute of Advanced Study, University of Science and Technology of China, Hefei, Anhui 230026, China NATIONALLICENCE 700 1- Mo C. M. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China NATIONALLICENCE 700 1- Zhang S. Y. Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China NATIONALLICENCE 700 1- Qin Y. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, China NATIONALLICENCE 700 1- Feng S. P. Institute of Solid State Physics, Chinese Academy of Science, Hefei, Anhui 230031, China NATIONALLICENCE 700 1- Li H. J. Materials Science and Engineering College, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/9(1998-09), 2533-2538 0884-2914 13:9<2533 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge