Thermoelectric material
View Patent ↗An apparatus for solid state energy harvesting includes a complex oxide based pyrochlores having a chemical formula of A2 B2 O7 configured to directly convert heat into electricity and operate and function at a higher temperature without oxidizing in air. The complex oxide based pyrochlores are mixed with cation at B-site.
1. An apparatus for solid state energy harvesting, comprising:
a complex oxide based pyrochlores having a chemical formula of A2 B2 O7 configured to directly convert heat into electricity and operate and function at a higher temperature without oxidizing in air, wherein
A2 represents 2 atoms of gadolinium and B2 represents 1 atom of ruthenium and 1 atom of vanadium, and
the complex oxide based pyrochlores are mixed with cation at B-site.
2. The apparatus of claim 1 , wherein the B-site comprises B 3+ and B ˜5+ , allowing the complex oxide based pyrochlores to be used in a gas turbine engine.
3. The apparatus of claim 1 , wherein the complex oxide based pyrochlores range from insulating to semi-conducting material.
4. The apparatus of claim 3 , wherein the complex oxide based pyrochlores has semiconducting behavior with a fraction of an electron volt to facilitate electric power conversion.
5. The apparatus of claim 1 , wherein the complex oxide based pyrochlores comprise a Seebeck coefficient at approximately 100 micro-volt per degree temperature Kelvin.
6. The apparatus of claim 1 , wherein the complex oxide based pyrochlores comprise an electrical resistivity of approximately 10 −2 Ohm*cm.
7. The apparatus of claim 1 , wherein the complex oxide based pyrochlores comprise a thermal conductivity of approximately 10 W/m*K.
8. The apparatus of claim 1 , wherein the complex oxide based pyrochlores comprise an electronic band gap greater than zero without oxidizing at high temperatures of 500 to 800 K in the air.
9. An apparatus for solid state energy harvesting, comprising:
a complex oxide based pyrochlores having a chemical formula of A2 B2 O7 configured to directly convert heat into electricity and operate and function at a higher temperature without oxidizing in air, wherein
A2 represents 2 atoms of gadolinium and B2 represents 1 atom of ruthenium and 1 atom of vanadium, and
the complex oxide based pyrochlores are mixed with cation at B-site, the B-site comprising B 3+ and B ˜5+ , allowing the complex oxide based pyrochlores to be used in a gas turbine engine.
10. The apparatus of claim 9 , wherein the complex oxide based pyrochlores range from insulating to semi-conducting material.
11. The apparatus of claim 10 , wherein the complex oxide based pyrochlores has semiconducting behavior with a fraction of an electron volt to facilitate electric power conversion.
12. The apparatus of claim 9 , wherein the complex oxide based pyrochlores comprise a Seebeck coefficient at approximately 100 micro-volt per degree temperature Kelvin.
13. The apparatus of claim 9 , wherein the complex oxide based pyrochlores comprise an electrical resistivity of approximately 10 −2 Ohm*cm.
14. The apparatus of claim 9 , wherein the complex oxide based pyrochlores comprise a thermal conductivity of approximately 10 W/m*K.
15. The apparatus of claim 9 , wherein the complex oxide based pyrochlores comprise an electronic band gap greater than zero without oxidizing at high temperatures of 500 to 800 K in the air.
16. The apparatus of claim 9 , wherein the complex oxide based pyrochlores comprises a predictive property of calculated cell parameters having a density of 8.75 mg/cm 3 .