Oxygen diffusion phenomena and hydrogen incorporation in reducing BaTiO_3 ceramics doped with ho below solubility limit
Oxygen diffusion phenomena and hydrogen incorporation in reducing BaTiO_3 ceramics doped with ho below solubility limit
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Ho掺杂BaTiO_3陶瓷在溶解度极限以下还原时的氧扩散现象和氢掺入
DOI：
10.1143/jjap.51.101801
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发表时间：
2012
影响因子：
1.5
通讯作者：
H.
中科院分区：
文献类型：
--
作者：
Sakaguchi;I.;Watanabe;K.;Hishita;S.;Ohashi;N.;Haneda;H.
研究了掺Ho量为5.2× 1018/cm 3的BaTiO 3陶瓷中的氧扩散现象，以揭示还原热退火对氧扩散的影响。在氧扩散实验之前，样品在850 ℃下在3%H2-Ar气氛中还原。氧扩散在700-800 ℃的温度范围内进行。扩散剖面和离子图像的测量揭示了由退火引起的氧缺陷分布。结果表明，当扩散温度低于还原温度850 ℃时，晶界起着阻挡氧扩散的作用。
Oxygen diffusion phenomena in BaTiO 3 ceramics doped with Ho of 5.2× 10 18/cm 3 were studied in order to reveal the effect of reduction thermal annealing. The samples were reduced at 850 C in a 3% H 2–Ar atmosphere before the oxygen diffusion experiments. The oxygen diffusion was carried out in the temperature range of 700–800 C. The measurement of diffusion profiles and ion images revealed the oxygen defect distribution caused by the annealing. The results show that the grain boundary acts as a layer blocking oxygen diffusion when the diffusion temperature is below the reduction temperature of 850 C.