Year: 1995
Type: article
Abstract: The effects of fabrication process parameters of P-Bi2Te3 on the thermoelectric properties has been studied. The factors are reduction of the powder from the ingot, cold isostatic press and sintering atmospheres of Ar and Ar/7%H2. The size of pow-der less than 355μm was used. As one of results, the lowest electrical resistivity were obtained in the process of using a reduced powder and sintering in the atmosphere of Ar/7%H2, which value at 57°C was 0.8×10-4Ω⋅m as compared to 1.1×10-4Ω⋅m sintered in the Ar atmosphere. Secondly, the results suggested that the tex-ture in the microstructure was important rather than density itself. The Seebeck coefficients of the specimens at 57°C sintered in Ar/7%H2 using a reduced powder showed almost same value of 240μ⋅V/K as the normal powder specimens sinterd in Ar atmosphere. It is concluded that a reducing process positively is not necessarily effective for improving the thermoelectrical properties.
Authors: Sunao Sugihara, Shigeru Tomita, Kouji Asakawa
Institution: Shonan Institute of Technology
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2330733549