Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-8-14-20
A. A. Zhdanok, L. Berdnikova, Z. A. Korotaeva, B. P. Tolochko, V. Bulgakov, M. A. Mikhaylenko
Ceramics based on barium aluminate with additives of iron (III) oxide and lithium hydroxide were obtained by solid-phase synthesis. It has been established that high-temperature treatment in an oxidizing medium contributes to the production of vacuum-dense samples that meet the «absolutely impermeable» tightness criterion, with a density of 3,75 g/cm3 , with a compressive strength limit of 597,1 MPa and a specific electrical conductivity in the range of 1,50·10‒7‒1,05·10‒4 Cm/ cm (at 90‒300 °C).
{"title":"Features of obtaining a vacuum-dense weakly conductive ceramics based on barium aluminate","authors":"A. A. Zhdanok, L. Berdnikova, Z. A. Korotaeva, B. P. Tolochko, V. Bulgakov, M. A. Mikhaylenko","doi":"10.17073/1683-4518-2023-8-14-20","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-8-14-20","url":null,"abstract":"Ceramics based on barium aluminate with additives of iron (III) oxide and lithium hydroxide were obtained by solid-phase synthesis. It has been established that high-temperature treatment in an oxidizing medium contributes to the production of vacuum-dense samples that meet the «absolutely impermeable» tightness criterion, with a density of 3,75 g/cm3 , with a compressive strength limit of 597,1 MPa and a specific electrical conductivity in the range of 1,50·10‒7‒1,05·10‒4 Cm/ cm (at 90‒300 °C).","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"117 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139203488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-7-33-37
I. N. Kravchenko, S. Y. Zhachkin, E. P. Timashov, G. Trifonov, S. Kartsev, S. N. Kuznetsov
The improvement of the technology of plasma deposition of wear-resistant coatings is shown. At the same time, special attention is paid to one of the most important parameters ― the thickness of the functional layer, since when using plasma deposition methods, it has a significant impact on the quality of coatings, as well as the functionality and productivity of the process. Based on the planning of the experiment, mathematical models have been developed that make it possible to establish the relationship between the coating thickness and the given technological parameters of the plasma spraying process. The results of the analysis of the dependences obtained showed that the thickness of the coating is most affected by the strength of the arc current of the plasma torch.
{"title":"Effect of plasma spraying technological modes on the formation of protective and functional coatings","authors":"I. N. Kravchenko, S. Y. Zhachkin, E. P. Timashov, G. Trifonov, S. Kartsev, S. N. Kuznetsov","doi":"10.17073/1683-4518-2023-7-33-37","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-7-33-37","url":null,"abstract":"The improvement of the technology of plasma deposition of wear-resistant coatings is shown. At the same time, special attention is paid to one of the most important parameters ― the thickness of the functional layer, since when using plasma deposition methods, it has a significant impact on the quality of coatings, as well as the functionality and productivity of the process. Based on the planning of the experiment, mathematical models have been developed that make it possible to establish the relationship between the coating thickness and the given technological parameters of the plasma spraying process. The results of the analysis of the dependences obtained showed that the thickness of the coating is most affected by the strength of the arc current of the plasma torch.","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"123 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139205100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-9-16-19
Y. Kryuchkov
The express method for evaluating the porous structure of ceramic materials has been refined by replacing a smooth change in gas pressure with a stepwise one with pressure holding at each stage. After determining the average radius, the maximum pressure drop is determined until only one chain of gas bubbles remains. The average coordination number for the solid phase and the coefficient of capillary tortuosity were calculated. The experimental and calculated mean radii are in good agreement with the data, while the tortuosity coefficients differ.
{"title":"Refined express method for evaluation of porous structure ceramic materials","authors":"Y. Kryuchkov","doi":"10.17073/1683-4518-2023-9-16-19","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-9-16-19","url":null,"abstract":"The express method for evaluating the porous structure of ceramic materials has been refined by replacing a smooth change in gas pressure with a stepwise one with pressure holding at each stage. After determining the average radius, the maximum pressure drop is determined until only one chain of gas bubbles remains. The average coordination number for the solid phase and the coefficient of capillary tortuosity were calculated. The experimental and calculated mean radii are in good agreement with the data, while the tortuosity coefficients differ.","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":" 29","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139207070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-7-8-11
I. I. Dement’eva, P. V. Kozlov, E. V. Polyakov, M. B. Remizov, A. A. Mal’tsev, P. I. Sikhinin
The paper presents the results of the studies of refractory materials produced by the company Keralit, JSC Borovichi Refractories Plant and STC Bakor and intended for the arch of the electric furnace EP-6 for HLW vitrification. The studies have determined strength properties and acid resistance of the materials when exposed to vapors of nitric acid and nitric acid solution. It has been concluded as a result of the studies that optimum materials for construction of the furnace arch are MKRTU-50 and MKV-65 materials produced by JSC Borovichi Refractories Plant and STC Bakor, respectively.
{"title":"Evaluation of performance of advanced refractory materials intended for the arch of the electric furnace for HLW vitrification","authors":"I. I. Dement’eva, P. V. Kozlov, E. V. Polyakov, M. B. Remizov, A. A. Mal’tsev, P. I. Sikhinin","doi":"10.17073/1683-4518-2023-7-8-11","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-7-8-11","url":null,"abstract":"The paper presents the results of the studies of refractory materials produced by the company Keralit, JSC Borovichi Refractories Plant and STC Bakor and intended for the arch of the electric furnace EP-6 for HLW vitrification. The studies have determined strength properties and acid resistance of the materials when exposed to vapors of nitric acid and nitric acid solution. It has been concluded as a result of the studies that optimum materials for construction of the furnace arch are MKRTU-50 and MKV-65 materials produced by JSC Borovichi Refractories Plant and STC Bakor, respectively.","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139208832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-10-22-26
M. S. Varfolomeev, A. Pokhorenko, G. Shcherbakova
.
.
{"title":"Features of manufacturing high-heat-resistant ceramics using aluminum hafnium binder","authors":"M. S. Varfolomeev, A. Pokhorenko, G. Shcherbakova","doi":"10.17073/1683-4518-2023-10-22-26","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-10-22-26","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139200163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-8-54-59
F. V. Krasikov, M. Markov, M. V. Staritsyn, M. L. Fedoseev, D. A. Tkachev, A. Bykova
{"title":"Electrodeposition of nickel-based composite electrochemical coatings using bulk-reinforced Al‒TiB2 powders","authors":"F. V. Krasikov, M. Markov, M. V. Staritsyn, M. L. Fedoseev, D. A. Tkachev, A. Bykova","doi":"10.17073/1683-4518-2023-8-54-59","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-8-54-59","url":null,"abstract":"","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"232 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139203267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-9-39-46
A. V. Fedotov, A. V. Belyakov, I. Kashcheev
The results of studies of materials of high and higher refractoriness for the cowper heater of high-temperature pulsed installations are presented. It is shown that long-term operation of corundum refractories (up to one and a half years) at temperatures of 1750‒1800 °C slightly changes the thermophysical properties of the material. Тhe materials and designs of the elements of the packing and lining of the cowper heater for different layers and temperatures are selected. The velocity of the gas flow, which ensures the fixed position of the ball nozzle, is determined. Efficient packing design improves heat transfer and reduces the size of the cowper column by a factor of 3,75.
{"title":"Refractory materials for high-temperature pulse installations","authors":"A. V. Fedotov, A. V. Belyakov, I. Kashcheev","doi":"10.17073/1683-4518-2023-9-39-46","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-9-39-46","url":null,"abstract":"The results of studies of materials of high and higher refractoriness for the cowper heater of high-temperature pulsed installations are presented. It is shown that long-term operation of corundum refractories (up to one and a half years) at temperatures of 1750‒1800 °C slightly changes the thermophysical properties of the material. Тhe materials and designs of the elements of the packing and lining of the cowper heater for different layers and temperatures are selected. The velocity of the gas flow, which ensures the fixed position of the ball nozzle, is determined. Efficient packing design improves heat transfer and reduces the size of the cowper column by a factor of 3,75.","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"1006 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139204909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-9-24-27
N. Lomanova
The functional characteristics of materials based on bismuth titanate Bi2Ti4O11 largely depend on the synthesis conditions. The preparation of nanocrystals of this compound is topical in connection with the problem of miniaturization of electronic components. The features of phase formation and the optimal conditions for the formation of a nanoceramic material based on Bi2Ti4O11 via coprecipitation from salt solutions are studied in the present work. The morphological features, temperature of formation and activation of sintering of the material were established.
{"title":"Preparation of nanoceramic material based on bismuth titanate Bi2Ti4O11","authors":"N. Lomanova","doi":"10.17073/1683-4518-2023-9-24-27","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-9-24-27","url":null,"abstract":"The functional characteristics of materials based on bismuth titanate Bi2Ti4O11 largely depend on the synthesis conditions. The preparation of nanocrystals of this compound is topical in connection with the problem of miniaturization of electronic components. The features of phase formation and the optimal conditions for the formation of a nanoceramic material based on Bi2Ti4O11 via coprecipitation from salt solutions are studied in the present work. The morphological features, temperature of formation and activation of sintering of the material were established.","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"110 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139207383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-10-3-8
V. I. Matyukhin, A. V. Matyukhina, S. E. Punenkov
.
.
{"title":"Features of the effect of coke oxidation kinetics on the performance of the mineral wool","authors":"V. I. Matyukhin, A. V. Matyukhina, S. E. Punenkov","doi":"10.17073/1683-4518-2023-10-3-8","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-10-3-8","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139198749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-30DOI: 10.17073/1683-4518-2023-7-52-59
V. N. Makarov, R. G. Akhmetov, S. Davydov, N. Makarov
Based on the hypothesis of the dominant effect on the environmental efficiency of drying materials in shaft furnaces of the concentration, median diameter, dispersion, temperature and humidity of dust particles at the outlet of the dryer, a device for thermal aeration separation of dust is proposed. The analysis of mathematical modeling of aerothermodynamic processes in a two-phase medium asbestos dust ‒ gas flow confirmed the conclusions of industrial studies on the influence of aerothermodynamic parameters of direct flow on the temperature and humidity of asbestos dust in the pneumatic dryer. Based on the principle of additive classification, a mathematical model of aeration separation of dust particles directly in the dryer of the shaft furnace is constructed, depending on the parameters of the heat carrier and the proposed device.
{"title":"Research and modeling of the ecological efficiency of drying refractory and building materials in vertical shaft furnaces","authors":"V. N. Makarov, R. G. Akhmetov, S. Davydov, N. Makarov","doi":"10.17073/1683-4518-2023-7-52-59","DOIUrl":"https://doi.org/10.17073/1683-4518-2023-7-52-59","url":null,"abstract":"Based on the hypothesis of the dominant effect on the environmental efficiency of drying materials in shaft furnaces of the concentration, median diameter, dispersion, temperature and humidity of dust particles at the outlet of the dryer, a device for thermal aeration separation of dust is proposed. The analysis of mathematical modeling of aerothermodynamic processes in a two-phase medium asbestos dust ‒ gas flow confirmed the conclusions of industrial studies on the influence of aerothermodynamic parameters of direct flow on the temperature and humidity of asbestos dust in the pneumatic dryer. Based on the principle of additive classification, a mathematical model of aeration separation of dust particles directly in the dryer of the shaft furnace is constructed, depending on the parameters of the heat carrier and the proposed device.","PeriodicalId":19463,"journal":{"name":"NOVYE OGNEUPORY (NEW REFRACTORIES)","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139199516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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