TY - JOUR
T1 - Effects of mesoporous silica addition on thermoelectric properties of Nb-doped SrTiO3
AU - Wang, Ning
AU - Han, Li
AU - He, Hongcai
AU - Ba, Yaoshuai
AU - Koumoto, Kunihito
PY - 2010
Y1 - 2010
N2 - The effects of mesoporous silica (MS) addition with a low thermal conductivity on the thermoelectric properties of Nb-doped SrTiO3 bulk materials are discussed. Nb-doped SrTiO3 bulk materials with varying amounts of added MS were fabricated by the conventional normal pressure sintering method in an Ar atmosphere. MS addition reduced the thermal conductivity, but enhanced the electrical conductivity significantly. Meanwhile, the Seebeck coefficient was almost independent of MS addition, thus, enhancing the ZT value. The sample with 5vol% MS gave the maximum ZT value of 0.165 at 900K. The reason for the reduced thermal conductivity and enhanced electrical conductivity by MS addition was also investigated.
AB - The effects of mesoporous silica (MS) addition with a low thermal conductivity on the thermoelectric properties of Nb-doped SrTiO3 bulk materials are discussed. Nb-doped SrTiO3 bulk materials with varying amounts of added MS were fabricated by the conventional normal pressure sintering method in an Ar atmosphere. MS addition reduced the thermal conductivity, but enhanced the electrical conductivity significantly. Meanwhile, the Seebeck coefficient was almost independent of MS addition, thus, enhancing the ZT value. The sample with 5vol% MS gave the maximum ZT value of 0.165 at 900K. The reason for the reduced thermal conductivity and enhanced electrical conductivity by MS addition was also investigated.
U2 - 10.1016/j.jallcom.2010.03.049
DO - 10.1016/j.jallcom.2010.03.049
M3 - Journal article
SN - 0925-8388
VL - 497
SP - 308
EP - 311
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -