通过研究组分、掺杂和晶体生长条件对材料温差电性能的影响,采用熔炼—区熔法研制出较均匀的高性能赝三元 p 型温差电材料 Te:(Sb_2Te_3)_0.75(1-x)(Bi_2Te_3)_(0.25(1-x))(Sb_2Se_3)(?)生长出的晶锭的85%的部分,温差电优值 z=2.9～3.3&...通过研究组分、掺杂和晶体生长条件对材料温差电性能的影响,采用熔炼—区熔法研制出较均匀的高性能赝三元 p 型温差电材料 Te:(Sb_2Te_3)_0.75(1-x)(Bi_2Te_3)_(0.25(1-x))(Sb_2Se_3)(?)生长出的晶锭的85%的部分,温差电优值 z=2.9～3.3×10^(-3)/K。其性能高于目前国内的赝二元材料,达到了国外的较高水平,用这种材料制作的温差电致冷器件获得了很好的致冷效果。展开更多
In this paper, we reported, for the first time, a novel and simple solution me thod for preparing stearic acid (SA) modified Bi nanoparticles from bulk bismuth granules. The SA-Bi nanoparticles with an average size of...In this paper, we reported, for the first time, a novel and simple solution me thod for preparing stearic acid (SA) modified Bi nanoparticles from bulk bismuth granules. The SA-Bi nanoparticles with an average size of 60nm were characteri zed by TEM, XRD and other techniques. The results show that SA-Bi nanoparticles have the same crystalline structure as that of bulk bismuth and exhibit good oi l solubility. The tribological properties of SA-Bi nanoparticles as a additive in oil were evaluated on a four-ball tester. The tribological results show that the SA-Bi nanoparticles have good antiwear performance. In addition, the mecha nism for formation of SA-Bi nanoparticles was discussed.展开更多
文摘通过研究组分、掺杂和晶体生长条件对材料温差电性能的影响,采用熔炼—区熔法研制出较均匀的高性能赝三元 p 型温差电材料 Te:(Sb_2Te_3)_0.75(1-x)(Bi_2Te_3)_(0.25(1-x))(Sb_2Se_3)(?)生长出的晶锭的85%的部分,温差电优值 z=2.9～3.3×10^(-3)/K。其性能高于目前国内的赝二元材料,达到了国外的较高水平,用这种材料制作的温差电致冷器件获得了很好的致冷效果。
文摘In this paper, we reported, for the first time, a novel and simple solution me thod for preparing stearic acid (SA) modified Bi nanoparticles from bulk bismuth granules. The SA-Bi nanoparticles with an average size of 60nm were characteri zed by TEM, XRD and other techniques. The results show that SA-Bi nanoparticles have the same crystalline structure as that of bulk bismuth and exhibit good oi l solubility. The tribological properties of SA-Bi nanoparticles as a additive in oil were evaluated on a four-ball tester. The tribological results show that the SA-Bi nanoparticles have good antiwear performance. In addition, the mecha nism for formation of SA-Bi nanoparticles was discussed.
