Lanthanum strontium titanate-based textured ceramic, preparation method and thermoelectric conversion element: Fid-Bau Portal

Lanthanum strontium titanate-based textured ceramic, preparation method and thermoelectric conversion element

QIN MENGJIE / MA JUN

The invention is suitable for the technical field of thermoelectric ceramics, and provides a lanthanum strontium titanate-based textured ceramic, a preparation method and a thermoelectric conversion element, the chemical composition composite chemical general formula of the lanthanum strontium titanate-based textured ceramic is [SLAT-yMe]-aS3T, SLAT is Sr(1-x)LaxTiO3, Me is a transition metal, S3T is Sr3Ti2O7, a is the mass ratio of S3T to SLAT-yMe, a is greater than or equal to 5 wt% and less than or equal to 20 wt%, y is the mass ratio of Me to SLAT, y is greater than or equal to 5 wt% and less than 25 wt%, and x is greater than 0 and less than 1; when the thermodynamic temperature is greater than or equal to 930K, the thermoelectric figure of merit in the vertical casting direction is not less than 0.4, and the average particle size of the transition metal is 20-60nm. The lanthanum strontium titanate-based textured ceramic provided by the invention has the advantages of high orientation and good thermoelectric performance.

本发明适用于热电陶瓷技术领域，提供了一种钛酸锶镧基织构陶瓷、制备方法和热电转换元件，钛酸锶镧基织构陶瓷的化学成分复合化学通式为[SLAT‑yMe]‑aS3T，其中，SLAT为Sr(1‑x)LaxTiO3，Me为过渡金属，S3T为Sr3Ti2O7，a为S3T与SLAT‑yMe的质量比，5wt％≦a≦20wt％，y为Me与SLAT的质量比，5wt％≦y<25wt％，0

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