Ion mobility in solid solutions of the fluorite structure 50Pb2–30BiF3–20KF (I) and 50Pb2–30BiF3–20NaF (II) was studied by NMR method. Analysis of 19F, 23Na NMR spectra made it possible to reveal the character of ...Ion mobility in solid solutions of the fluorite structure 50Pb2–30BiF3–20KF (I) and 50Pb2–30BiF3–20NaF (II) was studied by NMR method. Analysis of 19F, 23Na NMR spectra made it possible to reveal the character of ion motions in the fluoride and sodium sublattices with temperature variation, to determine the types and temperature ranges in which they took place. It was found that the dominant form of ionic mobility in the samples I and II above 380 K was the diffusion of fluoride and sodium ions. According to preliminary results of electro-physical studies, the conductivity reached values of ~ 2×10–2 – 10–3 S/cm above 500 K. The solid solutions I and II can be recommended as a basis for use in the development of new functional materials.展开更多
为了防止六硝基六氮杂异戊兹烷（CL-20）在生产过程中发生爆炸,选乙酸乙酯作为溶剂,采用自行设计的临界爆温测试装置对CL-20和CL-20溶液的热分解情况进行了测试。结果表明：在实验条件下,0.4 g CL-20在较高温度下加热时会发生爆炸;当CL...为了防止六硝基六氮杂异戊兹烷（CL-20）在生产过程中发生爆炸,选乙酸乙酯作为溶剂,采用自行设计的临界爆温测试装置对CL-20和CL-20溶液的热分解情况进行了测试。结果表明：在实验条件下,0.4 g CL-20在较高温度下加热时会发生爆炸;当CL-20溶液质量分数低于12%时,CL-20溶液不会发生爆炸;当CL-20质量分数在14%～16%时,CL-20溶液在170℃左右迅速分解且发生爆炸,且CL-20溶液浓度的变化对临界爆温的影响很小。实验结果对CL-20的安全生产具有一定的理论意义。展开更多
文摘Ion mobility in solid solutions of the fluorite structure 50Pb2–30BiF3–20KF (I) and 50Pb2–30BiF3–20NaF (II) was studied by NMR method. Analysis of 19F, 23Na NMR spectra made it possible to reveal the character of ion motions in the fluoride and sodium sublattices with temperature variation, to determine the types and temperature ranges in which they took place. It was found that the dominant form of ionic mobility in the samples I and II above 380 K was the diffusion of fluoride and sodium ions. According to preliminary results of electro-physical studies, the conductivity reached values of ~ 2×10–2 – 10–3 S/cm above 500 K. The solid solutions I and II can be recommended as a basis for use in the development of new functional materials.
文摘为了防止六硝基六氮杂异戊兹烷（CL-20）在生产过程中发生爆炸,选乙酸乙酯作为溶剂,采用自行设计的临界爆温测试装置对CL-20和CL-20溶液的热分解情况进行了测试。结果表明：在实验条件下,0.4 g CL-20在较高温度下加热时会发生爆炸;当CL-20溶液质量分数低于12%时,CL-20溶液不会发生爆炸;当CL-20质量分数在14%～16%时,CL-20溶液在170℃左右迅速分解且发生爆炸,且CL-20溶液浓度的变化对临界爆温的影响很小。实验结果对CL-20的安全生产具有一定的理论意义。
