| Ga掺杂La9+x/3(GeO4)6-x(GaO4)xO1.5的合成及导电性能研究 | |
| Synthesis and Conducting Properties of the Apatite-Type La9+x/3(GeO4)6-x(GaO4)xO1.5 | |
| 摘要: 利用固相法合成系列Ga掺杂缺陷氧锗氧基磷灰石La9+x/3(GeO4)6-x(GaO4)xO1.5(x=0,0.5,1,1.5)。X射线粉末衍射结果表明：反应物在1 350 ℃烧结24 h即可得到磷灰石结构的纯相产物。700 ℃时La9.5(GeO4)4.5(GaO4)1.5O1.5的电导率达到3.162×10-3 S·cm-1，是同温度La9(GeO4)6O1.5(1.259×10-3 S·cm-1)电导率的2.5倍。氧分压测试结果表明：材料的电导率在pO2=1～105 Pa保持不变，证明材料在较宽的氧分压范围内为02-导电。 | |
| 关键词: 缺陷氧基磷灰石 固相反应法 合成 电化学阻抗谱 | |
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| Abstract: The Ga element doped oxygen-deficient oxyapatites La9+x/3(GeO4)6-x(GaO4)xO1.5(x=0, 0.5, 1, 1.5, 2) were successfully synthesized via solid-state reaction method. It was found by XRD experiment that apatite phases were successfully obtained with the reactants heated at 1 350 ℃ for 24 h. The conductivity of La9.5(GeO4)4.5(GaO4)1.5O1.5 is 3.162×10-3 S·cm-1 at 700 ℃, which is about 2.5 times as the compound La9(GeO4)6O1.5(1.259×10-3 S·cm-1). The electrical conductivity of La9.5(GeO4)4.5(GaO4)1.5O1.5 is almost independent of the oxygen partial pressure from 1 to 105 Pa, indicating a pure oxygen ionic conductivity over a wide range of oxygen partial pressure. | |
| Keywords: oxygen-deficient oxyapatite solid-state reaction synthesis electrical impedance spectroscopy(EIS) | |
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| 安永昕,王贵领,赵 辉,霍丽华,尹鸽平.Ga掺杂La9+x/3(GeO4)6-x(GaO4)xO1.5的合成及导电性能研究[J].无机化学学报,2009,25(4):584-588. | |
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