Growth of Co-Based Oxide Whiskers
Growth of Co-Based Oxide Whiskers
复制标题
钴基氧化物晶须的生长
DOI：
10.1021/cm010473k
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发表时间：
2001
影响因子：
8.6
通讯作者：
M. Shikano
中科院分区：
文献类型：
--
作者：
R. Funahashi;I. Matsubara;M. Shikano
在氧气气氛中，用退火方法从前驱板表面生长了Bi2Sr2CoO6(BC-221)、(Bi2Sr2O4)x(CoO2)2(BC-222)和(Ca2CoO3)xCoO2(Co-225)三种单晶晶须。晶须的物相可以通过控制前驱板中的Co含量来控制。晶须的平均组成为Bi2.5(Sr，Ca)3.3CoO6+δ，Bi3.0(Sr，Ca)3.1Co2.0O9+δ，(Ca，Sr，Bi)1.9Co2.0O5+δ。虽然Co-225晶须的最长长度为1.2 mm，但BC-221和BC-222晶须的长度可达8.0 mm。显微结构观察表明，晶须的生长点是它们的基座。晶须的长度取决于前驱体板的结晶状态。
Three kinds of single-crystalline whiskers of Bi2Sr2CoO6 (BC-221), (Bi2Sr2O4)x(CoO2)2 (BC-222), and (Ca2CoO3)xCoO2 (Co-225) phases were grown from the surfaces of precursor plates by annealing in an O2 gas flow. The phases of the whiskers can be controlled by the Co content of the precursor plates. The average compositions of the whiskers are Bi2.5(Sr, Ca)3.3CoO6+δ, Bi3.0(Sr, Ca)3.1Co2.0O9+δ, and (Ca, Sr, Bi)1.9Co2.0O5+δ. Although the Co-225 whiskers are 1.2 mm at the longest, the BC-221 and the BC-222 whiskers reach lengths of as much as 8.0 mm. Microstructural observations indicate that the growth points of the whiskers are their bases. The length of the whiskers depends on the crystallization status of the precursor plates.