Improved thermoelectric properties in ceramic composites based on Ca3Co4O9 and Na2Ca2Nb4O13
The oxide materials Ca3Co4O9 and Na2Ca2Nb4O13 were combined in a new ceramic composite with promising synergistic thermoelectric properties.Both compounds show a plate-like crystal shape and similar Hooded Sweaters aspect ratios but the matrix material Ca3Co4O9 with lateral sizes of less than 500 nm is about two orders of magnitude smaller.Uniaxial