熱電(Thermoeletric，TE)材料(Ca2CoO3)(CoO2)Δ(Δ~1.61)可表為Ca3Co3.915¬O¬9+δ¬(δ=0.33)在近幾年已經成為研究TE材料的熱門材料之一。從前人的研究與我們的團隊努力下，對於Ca3Co3.915¬O¬9.33的固溶體形成因素，材料的導電機制以及Seebeck係數(thermopower)有深入的探討，且獲得許多寶貴的成果。對於Ca3Co3.915¬O¬9.33合成方法，本實驗根據前人的作法並加以改良出穩定且較緻密的合成相條件。在TE性質改良方面，是選擇新的方向作摻雜,利用鈰與鐵摻雜於Ca3Co3.915¬O¬9.33中， Ca3-xCexCo3.915-yFey¬O¬9.33系統TE性質。
實驗方法以CaCO3¬、Co3O4、CeO2、Fe2O3四種初始原料，利用化學計量比以固態法製備實驗樣本。根據參考文獻的數據，我們決定將鈰的添加量固定在x=0.1;鐵的添加量為y=0.05、0.1、0.2此三組和純相x=0，y=0做對照,探討純相Ca3Co3.915¬O¬9.33和摻雜鈰與鐵的Ca3-xCexCo3.915-yFey¬O¬9.33系統之TE相關特性的差異。

關鍵字 (中):鈣鈷氧349、熱電

Thermoelectric(TE) (Ca2CoO3)(CoO2)Δ(Δ~1.61) materials can be expressed as Ca3Co3.915¬O¬9+δ¬(δ=0.33)，For recent years has become one kind of hot materials for research TE materials.We report the Ca3Co3.915¬O¬9.33 formation factors of solid solution,Seebeck coefficient(thermopower) ,and the conduction mechanism of materials in Ca3Co3.915¬O¬9.33 with in- depth discussion.We obtain valuable results for Ca3Co3.915¬O¬9.33 synthesis method,that the experiment was based on previous practices and to improve the synthesis of a stable and dense phase conditions.For improving the TE propertices of Ca3Co3.915¬O¬9.33,we choose a new direction for the doping .Using cerium and iron doped in Ca3Co3.915¬O¬9.33,and research the Ca3-xCexCo3.915-yFey¬O¬9.33system.
The experimental methods were used CaCO3¬,Co3O4,CeO2 and Fe2O3 four kinds of starting materials, and the use of stoichiometric experiments were prepared by solid state reaction samples. According to reference data, we decided to add the amount of cerium fixed x=0.1; iron addition amount were y=0.05、0.1、0.2 , and then to compara pure phase(x=0,y=0) with the three series .We reach the differences with pure phase Ca3Co3.915¬O¬9.33 and doped cerium and iron Ca3-xCexCo3.915-yFey¬O¬9.33system characteristics of TE propertices.
關鍵字 (英): Ca3Co4O9、Thermoelectric

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