The Ni-Sb binary alloy system was thermodynamically assessed using CALPHAD approach in this article. Excess Gibbs energies of solution phases, liquid and fcc phases, were formulated using the Redlich-Kister expression...The Ni-Sb binary alloy system was thermodynamically assessed using CALPHAD approach in this article. Excess Gibbs energies of solution phases, liquid and fcc phases, were formulated using the Redlich-Kister expression. The intermediate phases were modeled by the sublattice model with （Ni,Va）0.5（Ni,Sb）0.25（Ni）0.25 for Ni3Sb_HT phase and （Ni,Va）0.3333（Sb）0.3333（Ni,Va）0.3333 for NiSb phase. The other phases including Ni3Sb, Ni7Sb3, and NiSb2 were treated as stoichiometric compound owing to their narrow composition ranges. Based on the reported thermodynamic properties and phase diagram data, the thermodynamic parameters of these phases were optimized, and the obtained values can reproduce the available experimental data well.展开更多
目的通过电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)法建立加味左金丸中Cd、Pb、As、Hg、Co、V、Ni、Cu、Li、Sb、Ba、Mo、Sn、Cr、Na、Mg、Al、Ca、Ti、Mn、Fe、Zn、Ga、Se、Sr、Tl共计26种无机元素...目的通过电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)法建立加味左金丸中Cd、Pb、As、Hg、Co、V、Ni、Cu、Li、Sb、Ba、Mo、Sn、Cr、Na、Mg、Al、Ca、Ti、Mn、Fe、Zn、Ga、Se、Sr、Tl共计26种无机元素的测定方法。方法加味左金丸通过微波消解法处理后,根据相对分子质量的大小选择内标物,其中^(7)Li、^(23)Na、^(24)Mg、^(27)Al、^(40)Ca、^(48)Ti、^(51)V、^(52)Cr、^(55)Mn、^(56)Fe、^(58)Ni、^(59)Co、^(63)Cu、^(66)Zn、^(70)Ga、^(75)As、^(77)Se、^(86)Sr以^(72)Ge作为内标;^(95)Mo、^(114)Cd、^(118)Sn、^(121)Sb、^(137)Ba以^(115)In作为内标;^(202)Hg、^(205)Tl、^(208)Pb以^(209)Bi作为内标。对标准品溶液、空白溶液与供试品溶液进行分析,采用标准曲线法进行定量分析。通过ICP-MS法进行测定。结果26种无机元素线性的相关系数r≥0.9996,检出限为0.001~1.500μg/L,定量限为0.01~5.00μg/L,精密度与重复性试验的RSD均小于5%,平均回收率在82.64%~106.44%,RSD均小于5%。对3个厂家的12批样品进行了测定,26种元素的含量差异较大,其中Na、Mg、Ca、Fe 4种元素的含量比较高,均大于500μg/g,Cd、Pb、As、Hg、Co、Li、Sb、Mo、Sn、Cr、Se、Tl的含量比较低,均小于1μg/g。由结果可知,人体的常量元素,如Na、Mg、Ca的含量比较高,Cd、Pb、As、Hg等有害元素含量比较低。根据《中国药典》2020年版一部的要求,本品中Cd、Pb、As、Hg与Cu均符合规定。结论该方法快速、准确,可以用于加味左金丸中无机元素的测定。展开更多
We report the results of low temperature resistivity and magnetization measurements on polycrystalline samples of four Ni-Sb compounds, Ni3 Sb, Ni5 Sb2, NiSb, and NiSb2. Resistivity measurements revealed that these co...We report the results of low temperature resistivity and magnetization measurements on polycrystalline samples of four Ni-Sb compounds, Ni3 Sb, Ni5 Sb2, NiSb, and NiSb2. Resistivity measurements revealed that these compounds exhibit a metallic type of electrical conductivity. Temperature dependences of the resistivities were well fitted by the generalized Bloch--Griineisen formula v^ith an exponent of n ^- 3, indicating that the s--d interband scattering is the dominant scatter- ing mechanism. The magnetic susceptibilities of NisSb2, NiSb, and NiSb2 are almost independent of temperature （above 150 K）, exhibiting Pauli paramagnetic behavior. The temperature dependences of the susceptibilities were fitted using the Curie-Weiss law. Ni3Sb was found to have a paramagnetic-ferromagnetic phase transition at 229 K. First-principles calculations have been performed to investigate the electronic structures and physical properties of these Ni-Sb alloys. The calculation of the band structure predicted that Ni3Sb, NisSb2, NiSb, and NiSb2 have char- acteristics of metal, and the ground state of Ni3Sb is ferromagnetic. The electrical and magnetic properties observed experimentally are consistent with that predicted by the first-principle electronic structure calculations.展开更多
基金the National Natu-ral Science Foundation of China (Nos. 50601001 and 50771105)
文摘The Ni-Sb binary alloy system was thermodynamically assessed using CALPHAD approach in this article. Excess Gibbs energies of solution phases, liquid and fcc phases, were formulated using the Redlich-Kister expression. The intermediate phases were modeled by the sublattice model with （Ni,Va）0.5（Ni,Sb）0.25（Ni）0.25 for Ni3Sb_HT phase and （Ni,Va）0.3333（Sb）0.3333（Ni,Va）0.3333 for NiSb phase. The other phases including Ni3Sb, Ni7Sb3, and NiSb2 were treated as stoichiometric compound owing to their narrow composition ranges. Based on the reported thermodynamic properties and phase diagram data, the thermodynamic parameters of these phases were optimized, and the obtained values can reproduce the available experimental data well.
基金Project supported by the National Natural Science Foundation of China(Grant No.21271183)the National Basic Research Program of China(Grant Nos.2011CBA00112 and 2011CB808202)
文摘We report the results of low temperature resistivity and magnetization measurements on polycrystalline samples of four Ni-Sb compounds, Ni3 Sb, Ni5 Sb2, NiSb, and NiSb2. Resistivity measurements revealed that these compounds exhibit a metallic type of electrical conductivity. Temperature dependences of the resistivities were well fitted by the generalized Bloch--Griineisen formula v^ith an exponent of n ^- 3, indicating that the s--d interband scattering is the dominant scatter- ing mechanism. The magnetic susceptibilities of NisSb2, NiSb, and NiSb2 are almost independent of temperature （above 150 K）, exhibiting Pauli paramagnetic behavior. The temperature dependences of the susceptibilities were fitted using the Curie-Weiss law. Ni3Sb was found to have a paramagnetic-ferromagnetic phase transition at 229 K. First-principles calculations have been performed to investigate the electronic structures and physical properties of these Ni-Sb alloys. The calculation of the band structure predicted that Ni3Sb, NisSb2, NiSb, and NiSb2 have char- acteristics of metal, and the ground state of Ni3Sb is ferromagnetic. The electrical and magnetic properties observed experimentally are consistent with that predicted by the first-principle electronic structure calculations.
