Stabilisation dopant-dependent facilitation in ionic conductivity on millimetre-wave irradiation heating of zirconia-based ceramics
Stabilisation dopant-dependent facilitation in ionic conductivity on millimetre-wave irradiation heating of zirconia-based ceramics
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氧化锆基陶瓷毫米波辐射加热离子电导率的稳定掺杂剂依赖性促进
DOI：
10.1016/j.jallcom.2015.07.057
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Teranishi and H. Hayashi
中科院分区：
文献类型：
--
作者：
A. Kishimoto;H. Hasunuma;T. Teranishi and H. Hayashi
在准毫米波（MMW）辐射加热和常规加热下，测量了钪、钙和钆稳定氧化锆陶瓷的离子电导率。我们对这些陶瓷的电导率增强进行了评估，并与我们之前关于氧化钇和氧化镱稳定氧化锆陶瓷（分别为YSZ和YbSZ）的报告进行了比较。在毫米波辐射加热下，各种阳离子取代氧化锆陶瓷的离子导电性增强。在钪稳定的情况下，在毫米波辐射加热下，表现出最大离子电导率的最佳成分是12mol %的氧化锆（ScSZ），比传统加热下要大。这种最优的成分变化与YSZ陶瓷的结果相似。这些结果从空位离子离解和离子转移的活化能的角度进行了讨论。
Ionic conductivity was measured on scandia-, calcia-, and gadolinia-stabilised zirconia ceramics under quasi-millimeter-wave (MMW) irradiation heating and conventional heating. Conductivity enhancement was evaluated for these ceramics and compared with our previous report on yttria- and ytterbia-stabilised zirconia ceramics (YSZ and YbSZ, respectively). The ionic conduction for the various cation-substituted zirconia ceramics was enhanced under MMW irradiation heating. In the case of scandia-stabilisation, the optimal composition demonstrating maximum ionic conductivity was 12-mol% zirconia (ScSZ) under MMW irradiation heating, which was larger than under conventional heating. Such an optimal composition shift was similar to results for YSZ ceramics. These results are discussed in terms of the activation energies for vacancy–ion dissociation and ion transfer.