ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES
The relevance of the research. The new proposed technology for obtaining refractory nitrides has several advantages: low energy consumption, no need for complex equipment, nitrogen is used to produce nitrides, synthesis is carried out at atmospheric pressure. The main aim of the research is to dete...
| Format: | Article |
|---|---|
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2018-12-01
|
| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/27 |
| _version_ | 1797811129486934016 |
|---|---|
| collection | DOAJ |
| description |
The relevance of the research. The new proposed technology for obtaining refractory nitrides has several advantages: low energy consumption, no need for complex equipment, nitrogen is used to produce nitrides, synthesis is carried out at atmospheric pressure. The main aim of the research is to determine experimentally the composition of combustion products of aluminum nanopowder and tantalum pentoxide mixtures in air and in liquid nitrogen. Object: tantalum nitride synthesis product obtained by burning the aluminum nanopowder mixture with tantalum pentoxide in air. Methodsh: x-ray analysis (diffractometer Difrey-401), differential thermal analysis (DTA) (thermoanalyzer SDT Q600 Instrument company). According to the results of the DTA the authors have calculated four parameters of activity of the mixtures: oxidation onset temperature (Tst.ox, °C), oxidation level (α, %), maximal oxidation rate (vmax, mg/min), specific thermal effect (ΔН, J/g). Results. The authors determined the parameters of activity of aluminum nanopowder with tantalum pentoxide mixtures. It is revealed that along with nitride and aluminum oxide in the products a crystalline phase of metallic tantalum is formed. The maximum yield of tantalum was 54 rel. %. It was shown experimentally that at aluminum nanopowder combustion in air, aluminum recovers tantalum pentoxide, which interacts with air nitrogen to form crystalline Ta2N tantalum nitride. According to X-ray, in the combustion products of a mixture of aluminum nanopowder with tantalum pentoxide, the crystalline phases of α- and β-tantalum are found. At the same time, tantalum nitride was not detected when the sample was burned in liquid nitrogen.
|
| first_indexed | 2024-03-13T07:19:07Z |
| format | Article |
| id | doaj.art-68628ecd325e41b798784a3af3d9eb68 |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-03-13T07:19:07Z |
| publishDate | 2018-12-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-68628ecd325e41b798784a3af3d9eb682023-06-04T21:06:43ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302018-12-013291210.18799/24131830/2018/12/27ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES The relevance of the research. The new proposed technology for obtaining refractory nitrides has several advantages: low energy consumption, no need for complex equipment, nitrogen is used to produce nitrides, synthesis is carried out at atmospheric pressure. The main aim of the research is to determine experimentally the composition of combustion products of aluminum nanopowder and tantalum pentoxide mixtures in air and in liquid nitrogen. Object: tantalum nitride synthesis product obtained by burning the aluminum nanopowder mixture with tantalum pentoxide in air. Methodsh: x-ray analysis (diffractometer Difrey-401), differential thermal analysis (DTA) (thermoanalyzer SDT Q600 Instrument company). According to the results of the DTA the authors have calculated four parameters of activity of the mixtures: oxidation onset temperature (Tst.ox, °C), oxidation level (α, %), maximal oxidation rate (vmax, mg/min), specific thermal effect (ΔН, J/g). Results. The authors determined the parameters of activity of aluminum nanopowder with tantalum pentoxide mixtures. It is revealed that along with nitride and aluminum oxide in the products a crystalline phase of metallic tantalum is formed. The maximum yield of tantalum was 54 rel. %. It was shown experimentally that at aluminum nanopowder combustion in air, aluminum recovers tantalum pentoxide, which interacts with air nitrogen to form crystalline Ta2N tantalum nitride. According to X-ray, in the combustion products of a mixture of aluminum nanopowder with tantalum pentoxide, the crystalline phases of α- and β-tantalum are found. At the same time, tantalum nitride was not detected when the sample was burned in liquid nitrogen. http://izvestiya.tpu.ru/archive/article/view/27Tantalum nitridethermal explosionnanopowderaluminumgas nitrogenliquid nitrogen |
| spellingShingle | ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES Известия Томского политехнического университета: Инжиниринг георесурсов Tantalum nitride thermal explosion nanopowder aluminum gas nitrogen liquid nitrogen |
| title | ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES |
| title_full | ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES |
| title_fullStr | ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES |
| title_full_unstemmed | ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES |
| title_short | ON AIR NITROGEN CHEMICAL BONDING IN HEAT EXPLOSION OF ALUMINUM NANOPOWDER AND TANTALUM OXIDE MIXTURES |
| title_sort | on air nitrogen chemical bonding in heat explosion of aluminum nanopowder and tantalum oxide mixtures |
| topic | Tantalum nitride thermal explosion nanopowder aluminum gas nitrogen liquid nitrogen |
| url | http://izvestiya.tpu.ru/archive/article/view/27 |