值大于2时开发出的热电设备才能与传统设备相抗衡。
目前，研究人员在氧化物热电材料研究中遇到的问题主要有两个：一是材料的电导率仍偏低，而热导率仍偏高，很难同时兼顾材料的电输运和热输运性能。二是对一部分氧化物热电材料的电热输运机理尚不清楚。
3.2 解决方案与展望
在当前研究状况下，继续寻找Seebeck系数和电导率更高，而热导率更低的新型氧化物热电材料。可以探索和应用新的合成工艺和制备方法，使用不同的制备方法获得的热电材料，其热电性能往往差异很大。或者探索使用低维热电材料，利用其超周期性和量子限制效应，降低材料热导率的同时不会降低其电导率。
氧化物热电材料的优势是其它热电材料所无法比拟的，是一种很有发展前途的热电材料。近几年，研究人员合成的氧化物热电材料其热电性能正一点点提高，在不远的将来，氧化物热电材料能够从实验室研究走向实际应用，以获得清洁安全的新能源，提高现有能源的使用效率，减少对煤、石油、天然气等传统能源的依赖，有效的保护大气环境。
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