The durability of thermoelectric modules is investigated by conducting material property tests over a range of module preparation pressures. Tensile strength and bending strength tests are carried out at room temperature for devices comprising one-piece oxide thermoelectric elements (p-type Ca_2.7Bi_0.3Co₄O₉ and n-type CaMn_0.98Mo_0.02O₃), silver paste, and silver sheet between two sheets of alumina substrate. Tensile strength was found to increase with device preparation pressure, reaching approximately 20 MPa for p-type devices at a preparation pressure of 6.36 MPa. The tensile strength of the n-type devices was less than 10 MPa. Module performance was tested under heat cycling and vibration by measuring thermoelectric generation properties including internal resistance, open-circuit voltage, and output power of the modules. Modules prepared at pressures above 3.19 MPa were found to have no degradation of thermoelectric properties during the vibration tests. Furthermore, no degradation during heat cycling was observed for modules prepared at 6.36 MPa. Continuous power generation tests at 973 K in air were performed for the modules prepared at 0.116 MPa and 6.36 MPa and no degradation was observed over 2400 h. For the module prepared at 6.36 MPa, no degradation was observed over 10000 h.

通过在一定范围的模块制备压力下进行材料性能测试，可以研究热电模块的耐久性。在室温下对包含一件式氧化物热电元件（p型Ca _2.7 Bi _0.3 Co ₄ O ₉和n型CaMn _0.98 Mo _0.02 O ₃），银浆和银的器件进行拉伸强度和弯曲强度测试。在两片氧化铝基材之间。发现拉伸强度随设备准备压力的增加而增加，p达到约20 MPa。型装置的制备压力为6.36 MPa。n型器件的拉伸强度小于10MPa。通过测量热电发电特性（包括内部电阻，开路电压和模块的输出功率），在热循环和振动下测试了模块性能。发现在高于3.19 MPa的压力下制备的模块在振动测试过程中没有热电性能的下降。此外，对于在6.36MPa下制备的组件，未观察到热循环过程中的降解。对于在0.116 MPa和6.36 MPa下制备的模块，在空气中以973 K进行了连续发电测试，在2400 h内未观察到降解。对于在6.36 MPa下制备的模块，在10000 h以上未观察到降解。