Effects of KCl Addition on the K2CO3Flux Growth of Ca3Co4O9Crystals for a Thermoelectric Device
Year: 2003
Type: article
Abstract: Crystals of Ca 3 Co 4 O 9 were grown by a solution method. We found that an appropriate amount of KCl addition to the K 2 CO 3 flux can facilitate the growth of Ca 3 Co 4 O 9 crystals and suppress the crystallization of Ca 3 Co 2 O 6 , which is the decomposed phase of Ca 3 Co 4 O 9 . Using a flux composition of K 2 CO 3 :KCl=4:1, we obtained large single Ca 3 Co 4 O 9 crystals possessing a well-grown a b -plane. The largest crystal formed had a size of about 4.5 × 2.5 × 0.02 mm 3 . The in -plane electrical resistivity and Seebeck coefficient at 300 K are 12 mΩcm and 150 µV/K, respectively. The Seebeck coefficient exhibited is slightly larger than previously reported values.
DOI: 10.1143/jjap.42.3549
Authors: Masashi Mikami, Shigeki Ohtsuka, Masashi Yoshimura, Yusuke Mori, Takatomo Sasaki, Ryoji Funahashi, Masahiro Shikano
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2010135713