Two sets of dehydration-melting with a natural solid amphibolite, collected from North Himalayan structure zone, Tibet, have been carried out in multi-anvil apparatus at 2.0 GPa and 800―1000℃, for 12―200 h. One is ...Two sets of dehydration-melting with a natural solid amphibolite, collected from North Himalayan structure zone, Tibet, have been carried out in multi-anvil apparatus at 2.0 GPa and 800―1000℃, for 12―200 h. One is keeping the pressure at 2.0 GPa and the annealing time of 12 h, changing the temperature (800―1000℃). The other is keeping the pressure at 2.0 GPa and temperature at 850℃, varying the annealing time (12―200 h). The products are inspected with microscope and electron probe. The results indicate that at 2.0 GPa, annealing time of 12 h, garnets, melts and clinopyroxenes occur in amphibolite gradually with increasing temperature and the chemical compositions of melt vary from tonalite to granodiorite, and then to tonalite. However, at 2.0 GPa and 850℃, with the annealing time increasing, the garnets, melts and cli-nopyroxenes also occur in amphibolite gradually and the chemical compositions of melt vary from tonalite to granodiorite. In both cases, melts interconnect with each other when the contents of melt are over the 5 vol.%. the viscosities of the melt produced in amphibolite at temperature higher than 850℃ are on a level with 104 Pa·s. The interconnected melt with such a viscosity may segregate from the source rock and form the magma over reasonable geological time. Therefore, it is believed that at the lower part of the overthickened crust, the tonlitic and grano-dioritic magma may be generated through the dehydration melting of amphibolite.展开更多
通过高温熔炼的方法制备掺Zn的Ag Sn Sb Se3,分析了Ag Sn Sb Se3掺Zn后得到的Ag Sn Sb1-xZnxSe3(x=0.01,0.02,0.03,0.04)的相组成、形貌、元素组成和热电性能的关系,并利用COMSOL Multiphysic仿真模拟了热电优值(ZT值)最高的Ag Sn Sb0.9...通过高温熔炼的方法制备掺Zn的Ag Sn Sb Se3,分析了Ag Sn Sb Se3掺Zn后得到的Ag Sn Sb1-xZnxSe3(x=0.01,0.02,0.03,0.04)的相组成、形貌、元素组成和热电性能的关系,并利用COMSOL Multiphysic仿真模拟了热电优值(ZT值)最高的Ag Sn Sb0.98Zn0.02Se3的发电性能.研究表明:所有样品均为高对称的岩盐Na Cl结构,Zn掺杂可在样品中形成纳米第二相,一定量的Zn掺杂可协同优化Ag Sn Sb Se3的电声输运性能,样品Ag Sn Sb0.98Zn0.02Se3获得最高热电优值0.86@823 K.当温差为460 K时,获得的最大发电功率为11.372 m W,发电效率为5%,对Ag Sn Sb Se3掺杂外来原子可提升其热电性能.展开更多
基金the National Natural Science Foumndation of China(Grant Nos.10299040 , 40103 003) the Knowleige Innovation Program of the Chinese Acacemy of Sciences(Gant No.RJCX2-SW-No.3).
文摘Two sets of dehydration-melting with a natural solid amphibolite, collected from North Himalayan structure zone, Tibet, have been carried out in multi-anvil apparatus at 2.0 GPa and 800―1000℃, for 12―200 h. One is keeping the pressure at 2.0 GPa and the annealing time of 12 h, changing the temperature (800―1000℃). The other is keeping the pressure at 2.0 GPa and temperature at 850℃, varying the annealing time (12―200 h). The products are inspected with microscope and electron probe. The results indicate that at 2.0 GPa, annealing time of 12 h, garnets, melts and clinopyroxenes occur in amphibolite gradually with increasing temperature and the chemical compositions of melt vary from tonalite to granodiorite, and then to tonalite. However, at 2.0 GPa and 850℃, with the annealing time increasing, the garnets, melts and cli-nopyroxenes also occur in amphibolite gradually and the chemical compositions of melt vary from tonalite to granodiorite. In both cases, melts interconnect with each other when the contents of melt are over the 5 vol.%. the viscosities of the melt produced in amphibolite at temperature higher than 850℃ are on a level with 104 Pa·s. The interconnected melt with such a viscosity may segregate from the source rock and form the magma over reasonable geological time. Therefore, it is believed that at the lower part of the overthickened crust, the tonlitic and grano-dioritic magma may be generated through the dehydration melting of amphibolite.
文摘通过高温熔炼的方法制备掺Zn的Ag Sn Sb Se3,分析了Ag Sn Sb Se3掺Zn后得到的Ag Sn Sb1-xZnxSe3(x=0.01,0.02,0.03,0.04)的相组成、形貌、元素组成和热电性能的关系,并利用COMSOL Multiphysic仿真模拟了热电优值(ZT值)最高的Ag Sn Sb0.98Zn0.02Se3的发电性能.研究表明:所有样品均为高对称的岩盐Na Cl结构,Zn掺杂可在样品中形成纳米第二相,一定量的Zn掺杂可协同优化Ag Sn Sb Se3的电声输运性能,样品Ag Sn Sb0.98Zn0.02Se3获得最高热电优值0.86@823 K.当温差为460 K时,获得的最大发电功率为11.372 m W,发电效率为5%,对Ag Sn Sb Se3掺杂外来原子可提升其热电性能.
