利用TEM、XRD等分析手段研究快速凝固Al Ti La合金中的化合物相的结构,以及高温退火后的结构,分析化合物相的高温稳定性,并提出化合物相的孪晶形核理论.快速凝固Al-Ti-La合金形成细小、圆整、弥散的金属间化合物相,经分析为Al20Ti2(RE)...利用TEM、XRD等分析手段研究快速凝固Al Ti La合金中的化合物相的结构,以及高温退火后的结构,分析化合物相的高温稳定性,并提出化合物相的孪晶形核理论.快速凝固Al-Ti-La合金形成细小、圆整、弥散的金属间化合物相,经分析为Al20Ti2(RE),金刚石立方结构,该化合物相形成孪晶,其孪晶面{111},孪晶方向[112],认为化合物相是以孪晶为晶核从熔体中优先其他化合物相形成并生长.展开更多
The equilibrium solubility of KCl ZnCl2 HCl(11%) H2O(25℃) quaternary system at 25℃ was determined and the phase diagram was constructed. This system is complicated with two new compounds K2ZnCl4·H2O (2∶1 type)...The equilibrium solubility of KCl ZnCl2 HCl(11%) H2O(25℃) quaternary system at 25℃ was determined and the phase diagram was constructed. This system is complicated with two new compounds K2ZnCl4·H2O (2∶1 type) and K5Zn4Cl13·3H2O (5∶4 type) which have been obtained from the system and have been characterized by XRD, TG DTG. The result shows that compound K5Zn4Cl13·3H2O of 5∶4 type is the new one which have not been reported before. For compound K2ZnCl4·H2O parameter of unit cell is a=11.976?, b=9.066?, c=7.015?, and it belong to orthogonal crystalline system. The result of TG DTG shows that compounds K2ZnCl4·H2O and K5Zn4Cl13·3H2O will dehydrate at 400℃ and 670℃, respectively.展开更多
Three open\|framework zinc germanophosphates have been synthesized from ethylene glycol systems of Zn(Ac)\-2·2H\-2O\|H\-3PO\-4\|\%R\%\|GeO\-2\|Py\|EG, where \%R\% stands for an amine and EG for ethylene glycol. I...Three open\|framework zinc germanophosphates have been synthesized from ethylene glycol systems of Zn(Ac)\-2·2H\-2O\|H\-3PO\-4\|\%R\%\|GeO\-2\|Py\|EG, where \%R\% stands for an amine and EG for ethylene glycol. It was found that by selecting proper amines as structure\|directing templates during crystallization open\|framework zinc germanophosphates were synthesized. The structures of the zinc germanophosphates were characterized by X\|ray diffraction(XRD), scanning electron microscopy(SEM), inductively coupled plasma(ICP) analysis, infrared spectroscopy(IR).展开更多
文摘利用TEM、XRD等分析手段研究快速凝固Al Ti La合金中的化合物相的结构,以及高温退火后的结构,分析化合物相的高温稳定性,并提出化合物相的孪晶形核理论.快速凝固Al-Ti-La合金形成细小、圆整、弥散的金属间化合物相,经分析为Al20Ti2(RE),金刚石立方结构,该化合物相形成孪晶,其孪晶面{111},孪晶方向[112],认为化合物相是以孪晶为晶核从熔体中优先其他化合物相形成并生长.
文摘The equilibrium solubility of KCl ZnCl2 HCl(11%) H2O(25℃) quaternary system at 25℃ was determined and the phase diagram was constructed. This system is complicated with two new compounds K2ZnCl4·H2O (2∶1 type) and K5Zn4Cl13·3H2O (5∶4 type) which have been obtained from the system and have been characterized by XRD, TG DTG. The result shows that compound K5Zn4Cl13·3H2O of 5∶4 type is the new one which have not been reported before. For compound K2ZnCl4·H2O parameter of unit cell is a=11.976?, b=9.066?, c=7.015?, and it belong to orthogonal crystalline system. The result of TG DTG shows that compounds K2ZnCl4·H2O and K5Zn4Cl13·3H2O will dehydrate at 400℃ and 670℃, respectively.
文摘Three open\|framework zinc germanophosphates have been synthesized from ethylene glycol systems of Zn(Ac)\-2·2H\-2O\|H\-3PO\-4\|\%R\%\|GeO\-2\|Py\|EG, where \%R\% stands for an amine and EG for ethylene glycol. It was found that by selecting proper amines as structure\|directing templates during crystallization open\|framework zinc germanophosphates were synthesized. The structures of the zinc germanophosphates were characterized by X\|ray diffraction(XRD), scanning electron microscopy(SEM), inductively coupled plasma(ICP) analysis, infrared spectroscopy(IR).
