Processing of energy materials in electromagnetic field

Gazenaur

et al. 2018

MSF

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…As we know that reaction sites in silver azide crystals are the same as ends of dislocations [5], it is necessary to identify them.…”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Magnetic Field on Crystallization and some Properties of Silver Azide Crystals

Rodzevich

Gazenaur

et al. 2018

MSF

“…Slow decomposition in silver azide crystals begins and becomes localized in reactive sites, which are formed by edge dislocations and point defects. Some authors [1,2] claim that Cottrell cloud including impurities of positively charged metal ions dominates formation of reactive sites. To date, a number of experiments have indicated that time needed for formation of reactive sites can be varied with the help of quantitative decline in the composition of impurity, that is, stabilizing the material chemically, controlling, therefore, its reactivity [1].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Additionally Introduced Impurities of Fe and Pb Ions on Silver Azide Decomposition

Rodzevich

Gazenauer

et al. 2017

KEM

The experiments have emphasized that additionally introduced impurities of Fe and Pb ions are relevant to the initiation of slow and explosive decomposition of silver azide crystals by the external electric field and UV irradiation. External gas release was used for research purpose. Test-sensitivity is 10−12 mole. Time-to-explosion was measured by a stop watch. It’s been found out that the reaction of slow decomposition in silver azide under the action of electric field turns into explosion faster in samples with the additionally introduced impurities. The samples with additionally introduced Fe are the most explosive ones (time-to-explosion 3 minutes). The authors have assumed that external influence can generate non-equilibrium charge carriers (holes), which become localized on cationic vacancies and support formation of reactive sites. As soon as cut off concentration of these sites is reached, the solid-phase chain reaction turns into explosion. The growing concentration of impurity influences on the number of reactive sites, making their concentration critical. In view of the results obtained in experiments a procedure for monitoring the decomposition of crystals is suggested, which necessitates additional introduction of Fe and Pb ions.

Combined treatment of energy-saturated materials in external fields

Gazenaur

Krasheninin

et al. 2020

J. Phys.: Conf. Ser.

The paper analyses the effect lead and iron ions have on slow and explosive decomposition in crystals of silver azide initiated by a contact electric filed, local physical impact and UV-radiation. The reaction of decomposition registered immediately in the process of impact was examined according to gas release. This method provides accuracy of 10−12 mole. A stop-watch was used to determine time-to-explosion. The outcomes of experiments show that introduction of lead and iron ions into crystals of silver azide deteriorates strength of samples under local physical impact; furthermore, gas release caused by this type of impact stimulates fracture of samples. Experimental data indicate that crystals of silver azide with introduced lead and iron tend to decompose more intensively in a contact electric field. As for UV-radiation, it also has a significant decomposing effect on samples with introduced impurity substances, however, no explosion is registered, i.e. a maximal amount of gas is emitted at a certain period of time; afterwards gas release becomes less intensive and stops in approximately 20 minutes after the treatment starts. Any external impact generates misbalanced charge carriers (holes). Holes are localized on cation vacancies associated with generation of reactive centres. The number of reactive centres grows due to the increased concentration of impurity defects and might become critical. Data of experiments suggest that crystals of silver azide with introduced impurities are less stable and chemically inactive in external fields.