Abstract Geopolymers have gained attention as a potential eco-friendly alternative to Portland cement, primarily due to their reduced carbon dioxide emissions and the opportunity to repurpose industrial waste materials. Fly ash (FA), a byproduct of coal combustion, has been favored as a raw material for geopolymer concrete owing to its widespread availability and high concentrations of alumina and silica. The development and application of fly ash–based geopolymer concrete can contribute significantly to production of sustainable construction materials. An in-depth analysis of fly ash–based geopolymer concrete has been conducted to explore its potential as a substitute for traditional concrete. This review encompasses the underlying reaction mechanism, strength, long-term durability, and microstructural characteristics of geopolymer concrete. The present review paper shows that adding the optimal quantity of fly ash improves the performance of fly ash–based geopolymer when exposed to extreme durability conditions, as well as improving strength properties. The microstructural analysis shows that when fly ash is added, the microstructure of the concrete matrix would be dense and packed. However, challenges remain in adopting fly ash–based geopolymer concrete for large-scale construction projects, as the existing literature presents inconsistencies in the reported strength, durability, and test results. Further research is necessary to consolidate knowledge on the behavior and mechanism of fly ash–based geopolymer concrete and to ultimately provide comprehensive data to support its widespread implementation in the construction industry.
{"title":"Hydration, Microstructure, and Properties of Fly Ash–Based Geopolymer: A Review","authors":"Mohammad Khawaji","doi":"10.2478/msp-2023-0006","DOIUrl":"https://doi.org/10.2478/msp-2023-0006","url":null,"abstract":"Abstract Geopolymers have gained attention as a potential eco-friendly alternative to Portland cement, primarily due to their reduced carbon dioxide emissions and the opportunity to repurpose industrial waste materials. Fly ash (FA), a byproduct of coal combustion, has been favored as a raw material for geopolymer concrete owing to its widespread availability and high concentrations of alumina and silica. The development and application of fly ash–based geopolymer concrete can contribute significantly to production of sustainable construction materials. An in-depth analysis of fly ash–based geopolymer concrete has been conducted to explore its potential as a substitute for traditional concrete. This review encompasses the underlying reaction mechanism, strength, long-term durability, and microstructural characteristics of geopolymer concrete. The present review paper shows that adding the optimal quantity of fly ash improves the performance of fly ash–based geopolymer when exposed to extreme durability conditions, as well as improving strength properties. The microstructural analysis shows that when fly ash is added, the microstructure of the concrete matrix would be dense and packed. However, challenges remain in adopting fly ash–based geopolymer concrete for large-scale construction projects, as the existing literature presents inconsistencies in the reported strength, durability, and test results. Further research is necessary to consolidate knowledge on the behavior and mechanism of fly ash–based geopolymer concrete and to ultimately provide comprehensive data to support its widespread implementation in the construction industry.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135005411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Tool life performances of Al 2 O 3 +TiC and TiN+AlCrN tool inserts were investigated experimentally under different cutting conditions in turning AISI 4140 steel. The tool life model is defined in accordance with a maximum surface roughness of 0.8 μm for the tool life criterion. The relationships between machining factors (i.e., cutting speed and feed rate) and tool life were obtained by Taylor’s formular. The sensitivity of cutting speed and feed rate to tool life was evaluated by Monte Carlo simulation. The results showed that turning with high cutting speeds and feed rates decreased the tool life of both inserts. At different cutting speeds and feed rates, Al 2 O 3 +TiC exhibited better tool life performance than TiN+AlCrN. In addition, the simulation results indicated the average tool life of Al 2 O 3 +TiC was approximately 40% greater than that of TiN+AlCrN by varying cutting speeds below and above the cutting speed of 220 m/min while keeping the feed rate constant at 0.06 mm/rev. Similarly, when keeping the cutting speed constant at 220 m/min, the average tool life of Al 2 O 3 +TiC was approximately 45% greater than that of TiN+AlCrN by varying feed rates below and above the feed rate of 0.06 mm/rev. Variations of tool life values by varying cutting speeds were more sensitive than those by varying feed rates for both tool inserts.
{"title":"Simulation of the influence of cutting speed and feed rate on tool life in hard turning of AISI 4140 steel","authors":"Phacharadit Paengchit, Charnnarong Saikaew","doi":"10.2478/msp-2023-0021","DOIUrl":"https://doi.org/10.2478/msp-2023-0021","url":null,"abstract":"Abstract Tool life performances of Al 2 O 3 +TiC and TiN+AlCrN tool inserts were investigated experimentally under different cutting conditions in turning AISI 4140 steel. The tool life model is defined in accordance with a maximum surface roughness of 0.8 μm for the tool life criterion. The relationships between machining factors (i.e., cutting speed and feed rate) and tool life were obtained by Taylor’s formular. The sensitivity of cutting speed and feed rate to tool life was evaluated by Monte Carlo simulation. The results showed that turning with high cutting speeds and feed rates decreased the tool life of both inserts. At different cutting speeds and feed rates, Al 2 O 3 +TiC exhibited better tool life performance than TiN+AlCrN. In addition, the simulation results indicated the average tool life of Al 2 O 3 +TiC was approximately 40% greater than that of TiN+AlCrN by varying cutting speeds below and above the cutting speed of 220 m/min while keeping the feed rate constant at 0.06 mm/rev. Similarly, when keeping the cutting speed constant at 220 m/min, the average tool life of Al 2 O 3 +TiC was approximately 45% greater than that of TiN+AlCrN by varying feed rates below and above the feed rate of 0.06 mm/rev. Variations of tool life values by varying cutting speeds were more sensitive than those by varying feed rates for both tool inserts.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135055420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract This work studied the surface, interface state and physicochemical properties of HNO3-treated and KOH-treated carbon fiber. Poly(methyl methacrylate) (PMMA) composites were prepared by the autoclave molding process using surface-treated carbon fiber as reinforcements. The physical and chemical states of the carbon fiber surfaces and the micro-interface properties and interlaminar shear properties of the composites were studied. The results show that the surface of the HNO3-treated carbon fiber has more groove structure and higher surface roughness and thus forms a better physical bond with the resin matrix. Although the oxygen-containing functional groups of the two carbon fibers are equivalent, the surface oxygen of the HNO3-treated carbon fiber is relatively high, which is beneficial to form a better chemical bond with the matrix resin, and the interfacial shear strength is about 14% higher than that of the KOH-treated carbon fiber composite.
{"title":"Effect of carbon fiber surface treatment with HNO3 and KOH on the interfacial bonding of PMMA resin composite","authors":"Li Jian","doi":"10.2478/msp-2023-0022","DOIUrl":"https://doi.org/10.2478/msp-2023-0022","url":null,"abstract":"Abstract This work studied the surface, interface state and physicochemical properties of HNO3-treated and KOH-treated carbon fiber. Poly(methyl methacrylate) (PMMA) composites were prepared by the autoclave molding process using surface-treated carbon fiber as reinforcements. The physical and chemical states of the carbon fiber surfaces and the micro-interface properties and interlaminar shear properties of the composites were studied. The results show that the surface of the HNO3-treated carbon fiber has more groove structure and higher surface roughness and thus forms a better physical bond with the resin matrix. Although the oxygen-containing functional groups of the two carbon fibers are equivalent, the surface oxygen of the HNO3-treated carbon fiber is relatively high, which is beneficial to form a better chemical bond with the matrix resin, and the interfacial shear strength is about 14% higher than that of the KOH-treated carbon fiber composite.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135052037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Andrii Bieliatynskyi, Shilin Yang, Kateryna Krayushkina, Meiyu Shao, Mingyang Ta
Abstract The introduction of new effective road construction materials for pavements and foundations of highways is an urgent task, including the development and application of resource-saving technologies aimed at the use of low-demand, large-tonnage mineral materials, semi-finished products, industrial waste, and their by-products. Research on this topic has shown that sulfur and sulfur-containing waste, as well as modified technical sulfur when used as a binder, should be widely used in sulfur structural and road concrete in liquid, granular, or lumpy form. Ferrous cakes from the Pobug Nickel Plant or “tailings” of sulfur ore flotation can be used as fillers for sulfur binder. Having a high specific surface, they will have a positive effect on the structure formation of sulfur during the crystallization of the melt in the direction of strengthening the structure. Their high acid resistance should significantly increase the corrosion resistance of sulfur concretes. Granular slag from a metallurgical plant can be used as a fine aggregate. Overburden rocks in the form of gabbro-dolerites, dolerites, and basalts can be used as acid-resistant large aggregates. To reduce the fragility of the sulfur binder, plasticizing additives such as naphthalene, chlorinated paraffin, and bitumen can be introduced. The results obtained in this study confirm a decrease in the cost in the production of asphalt and cement concrete and the possibility of expanding the range of building materials with new road-building mixtures. Also, the test results showed that when temperature was decreased, the strength characteristics of sulfur concrete in the temperature range 0°C to −60°C increased by 7%. Low water absorption of sulfur concrete (0.1%–0.3%) versus cement concrete (2%–4%), which positively affected the strength and operational characteristics, was revealed.
{"title":"Study of the possibility of using sulfur asphalt and sulfur concrete in road construction","authors":"Andrii Bieliatynskyi, Shilin Yang, Kateryna Krayushkina, Meiyu Shao, Mingyang Ta","doi":"10.2478/msp-2023-0016","DOIUrl":"https://doi.org/10.2478/msp-2023-0016","url":null,"abstract":"Abstract The introduction of new effective road construction materials for pavements and foundations of highways is an urgent task, including the development and application of resource-saving technologies aimed at the use of low-demand, large-tonnage mineral materials, semi-finished products, industrial waste, and their by-products. Research on this topic has shown that sulfur and sulfur-containing waste, as well as modified technical sulfur when used as a binder, should be widely used in sulfur structural and road concrete in liquid, granular, or lumpy form. Ferrous cakes from the Pobug Nickel Plant or “tailings” of sulfur ore flotation can be used as fillers for sulfur binder. Having a high specific surface, they will have a positive effect on the structure formation of sulfur during the crystallization of the melt in the direction of strengthening the structure. Their high acid resistance should significantly increase the corrosion resistance of sulfur concretes. Granular slag from a metallurgical plant can be used as a fine aggregate. Overburden rocks in the form of gabbro-dolerites, dolerites, and basalts can be used as acid-resistant large aggregates. To reduce the fragility of the sulfur binder, plasticizing additives such as naphthalene, chlorinated paraffin, and bitumen can be introduced. The results obtained in this study confirm a decrease in the cost in the production of asphalt and cement concrete and the possibility of expanding the range of building materials with new road-building mixtures. Also, the test results showed that when temperature was decreased, the strength characteristics of sulfur concrete in the temperature range 0°C to −60°C increased by 7%. Low water absorption of sulfur concrete (0.1%–0.3%) versus cement concrete (2%–4%), which positively affected the strength and operational characteristics, was revealed.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135056248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Sakthi, S. Mahendran, M. Meignanamoorthy, V. Mohanavel
Abstract Magnesium composites are innovative, compact, and distinctive materials. Because of their low density, magnesium composites are suitable for applications in the automobile, aviation, semiconductor, and pharmaceutical sectors. To enhance the mechanical wear and corrosion behavior of theAZ61 Mg alloy, different weight percentages of nano-B4C reinforcements (2.5, 5, 7.5, and 10wt%) were strengthened with magnesium matrix. Fabrication of magnesium composites was achieved through the stir casting method. The as-cast specimens were subjected to microstructural analysis, which showed that the B4C nanoparticles were dispersed uniformly, well bonded to the matrix, and had a minimal level of porosity. This shows that the inclusion of B 4 C nanoparticles has aninsignificanteffect on the microstructure of the as-cast material. The material’s tensile strength, compressive strength, hardness, corrosion resistance, and wear resistance were all greatly increased by the Mg17Al12 phase’s fracture and dispersion. Scanning electron microscopy was utilized to inspect the surfaces of AZ61/B 4 C nanocomposites and witnessed the uniform dispersal of reinforcement within the matrix.The maximum value for mechanical properties was obtained for AZ61/7.5wt%B 4 C nanocomposite and the lowest value was found to be the corrosion test. These results show that the AZ61/7.5wt%B 4 C nanocomposite is a superior material for aerospace and automotive engineering components where high compressive strength, corrosion resistance, and wear resistance are required.
{"title":"Investigation of the mechanical, corrosion, and tribological characteristics of AZ61 Mg with boron carbide nano particles via the stir casting route","authors":"S. Sakthi, S. Mahendran, M. Meignanamoorthy, V. Mohanavel","doi":"10.2478/msp-2023-0019","DOIUrl":"https://doi.org/10.2478/msp-2023-0019","url":null,"abstract":"Abstract Magnesium composites are innovative, compact, and distinctive materials. Because of their low density, magnesium composites are suitable for applications in the automobile, aviation, semiconductor, and pharmaceutical sectors. To enhance the mechanical wear and corrosion behavior of theAZ61 Mg alloy, different weight percentages of nano-B4C reinforcements (2.5, 5, 7.5, and 10wt%) were strengthened with magnesium matrix. Fabrication of magnesium composites was achieved through the stir casting method. The as-cast specimens were subjected to microstructural analysis, which showed that the B4C nanoparticles were dispersed uniformly, well bonded to the matrix, and had a minimal level of porosity. This shows that the inclusion of B 4 C nanoparticles has aninsignificanteffect on the microstructure of the as-cast material. The material’s tensile strength, compressive strength, hardness, corrosion resistance, and wear resistance were all greatly increased by the Mg17Al12 phase’s fracture and dispersion. Scanning electron microscopy was utilized to inspect the surfaces of AZ61/B 4 C nanocomposites and witnessed the uniform dispersal of reinforcement within the matrix.The maximum value for mechanical properties was obtained for AZ61/7.5wt%B 4 C nanocomposite and the lowest value was found to be the corrosion test. These results show that the AZ61/7.5wt%B 4 C nanocomposite is a superior material for aerospace and automotive engineering components where high compressive strength, corrosion resistance, and wear resistance are required.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135003012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P.R. Kannan, R Thanigaivelan, R Thiraviam, K Pradeep Kumar
Abstract Aluminium-based hybrid nano-metal matrix composites are right materials, finding application in the aerospace and automotive industry. The present research focused on the effects of sliding load, sliding velocity, and temperature on wear behaviour of a novel hybrid metal matrix nano-composite .Stir-squeeze casting setup is used to produce the composites. The base metal is scrap aluminium alloy wheel (SAAW) reinforced with 1, 2, wt.% and 5.5, 7 wt.% of micro-sized alumina (Al 2 O 3 ) m and nano-sized alumina (Al 2 O 3 ) n particle respectively. An orthogonal array L 9 (OA) has been used for designing the experiments. Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) is applied to find the optimal condition for Coefficient of Friction(COF),wear, surface roughness. Analysis of Variance (ANOVA) results show that the reinforcement contributes 19.40% and most influencing factor is sliding load with 62.33%. The samples tested were examined and analyzed using a Field Emission Scanning Electron Microscope (FESEM) and an energy-dispersive X-ray spectrometry (EDX). Additionally, a profilometer was used to measure the surface roughness of the worn-out specimen.
摘要铝基杂化纳米金属基复合材料在航空航天和汽车工业中有着广泛的应用前景。本文主要研究了滑动载荷、滑动速度和滑动温度对复合材料磨损性能的影响。母材为废铝合金轮毂(SAAW)，分别添加1.2.2 wt.%和5.5.7 wt.%的微晶氧化铝(al2o3) m和纳米级氧化铝(al2o3) n颗粒。实验采用正交阵列l9 (OA)设计。采用TOPSIS (Order Preference by Similarity to Ideal Solution)方法求解摩擦系数、磨损、表面粗糙度的最优条件。方差分析(ANOVA)结果表明，钢筋对结构的影响为19.40%，其中滑动荷载对结构的影响最大，为62.33%。测试样品使用场发射扫描电子显微镜(FESEM)和能量色散x射线光谱(EDX)进行检查和分析。此外，轮廓仪被用来测量磨损试样的表面粗糙度。
{"title":"Performance studies on hybrid nano-metal matrix composites for wear and surface quality","authors":"P.R. Kannan, R Thanigaivelan, R Thiraviam, K Pradeep Kumar","doi":"10.2478/msp-2023-0020","DOIUrl":"https://doi.org/10.2478/msp-2023-0020","url":null,"abstract":"Abstract Aluminium-based hybrid nano-metal matrix composites are right materials, finding application in the aerospace and automotive industry. The present research focused on the effects of sliding load, sliding velocity, and temperature on wear behaviour of a novel hybrid metal matrix nano-composite .Stir-squeeze casting setup is used to produce the composites. The base metal is scrap aluminium alloy wheel (SAAW) reinforced with 1, 2, wt.% and 5.5, 7 wt.% of micro-sized alumina (Al 2 O 3 ) m and nano-sized alumina (Al 2 O 3 ) n particle respectively. An orthogonal array L 9 (OA) has been used for designing the experiments. Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) is applied to find the optimal condition for Coefficient of Friction(COF),wear, surface roughness. Analysis of Variance (ANOVA) results show that the reinforcement contributes 19.40% and most influencing factor is sliding load with 62.33%. The samples tested were examined and analyzed using a Field Emission Scanning Electron Microscope (FESEM) and an energy-dispersive X-ray spectrometry (EDX). Additionally, a profilometer was used to measure the surface roughness of the worn-out specimen.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135052038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The article presents the research in the field of production of metal–matrix composite coatings using laser cladding technology. The general purpose of producing composite coatings is the improvement of wear resistance of the material surface. In this research, Inconel 625 was used as a matrix material. Nickel-based superalloys are used in several industries for unique applications because they possess a number of beneficial properties including high tensile and fatigue strengths and resistance to high-temperature corrosion in aggressive environments. However, for some applications, this alloy shows insufficient wear resistance of the surface; therefore, for the tests, Inconel 625-based composite coatings were produced with the addition of 10 vol.%, 20 vol.%, and 40 vol.% of titanium carbide (TiC) particles as reinforcement. In general, the addition of TiC particles had a positive effect on the erosion resistance of the surface. The aim of the current research was to test the influence of TiC particle reinforcement of Inconel 625 laser-cladded coatings on corrosion resistance of the surface. For the tests, the laser-cladded composite coatings with uniform phase distribution were produced. The proceeded tests included penetrant tests, macrostructure and microstructure analysis, X-ray diffraction (XRD), and microhardness and corrosion resistance tests. The results showed that using laser cladding, TiC-reinforced Inconel 625 uniform composite coatings may be produced. The addition of TiC particles caused microstructure changes in the Inconel 625 matrix and an increase in hardness. The addition of TiC particles had a negative influence on Inconel 625 corrosion resistance, but with the increased composite coating homogeneity, the corrosion resistance improved.
{"title":"The structure and properties of laser-cladded Inconel 625/TiC composite coatings","authors":"Aleksandra Lont, Tomasz Poloczek, Jacek Górka","doi":"10.2478/msp-2022-0026","DOIUrl":"https://doi.org/10.2478/msp-2022-0026","url":null,"abstract":"The article presents the research in the field of production of metal–matrix composite coatings using laser cladding technology. The general purpose of producing composite coatings is the improvement of wear resistance of the material surface. In this research, Inconel 625 was used as a matrix material. Nickel-based superalloys are used in several industries for unique applications because they possess a number of beneficial properties including high tensile and fatigue strengths and resistance to high-temperature corrosion in aggressive environments. However, for some applications, this alloy shows insufficient wear resistance of the surface; therefore, for the tests, Inconel 625-based composite coatings were produced with the addition of 10 vol.%, 20 vol.%, and 40 vol.% of titanium carbide (TiC) particles as reinforcement. In general, the addition of TiC particles had a positive effect on the erosion resistance of the surface. The aim of the current research was to test the influence of TiC particle reinforcement of Inconel 625 laser-cladded coatings on corrosion resistance of the surface. For the tests, the laser-cladded composite coatings with uniform phase distribution were produced. The proceeded tests included penetrant tests, macrostructure and microstructure analysis, X-ray diffraction (XRD), and microhardness and corrosion resistance tests. The results showed that using laser cladding, TiC-reinforced Inconel 625 uniform composite coatings may be produced. The addition of TiC particles caused microstructure changes in the Inconel 625 matrix and an increase in hardness. The addition of TiC particles had a negative influence on Inconel 625 corrosion resistance, but with the increased composite coating homogeneity, the corrosion resistance improved.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"53 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138519749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract A double-jet electrospinning method was adopted to fabricate In 2 O 3 /Co 3 O 4 nanofibers (NFs). The sensitivity of In 2 O 3 /Co 3 O 4 NFs and In 2 O 3 NFs were compared and analyzed, and the morphology, structure, chemical composition, and gas-sensing properties of the samples were comprehensively characterized. The results show that the introduction of Co 3 O 4 can improve the response of In 2 O 3 /Co 3 O 4 to acetone, to 29.52 (In 2 O 3 /Co 3 O 4 ) and 12.34 (In 2 O 3 ) to 200 ppm acetone at 2000°C, respectively. In addition, the doping of Co 3 O 4 was found to reduce the optimum working temperature of pure In 2 O 3 from 275°C to 200°C. The composite of Co 3 O 4 and In 2 O 3 not only enhances the sensing performance, but also leads to a conversion of p-n conductivity type. The phenomenon of the p-n transition is relevant to operating temperature and proportion of In 2 O 3 and Co 3 O 4 . While the enhanced acetone sensing properties of In 2 O 3 /Co 3 O 4 NFs may be attributed to the p-n heterojunction between n-type In 2 O 3 and p-type Co 3 O 4 crystalline grains, which promotes the electron migration. The synergistic effects between In 2 O 3 and Co 3 O 4 and the large specific surface area of NFs additionally contribute to the improvements of acetone sensing performance.
摘要:采用双射流静电纺丝法制备了In 2o3 /Co 2o3纳米纤维。比较分析了In 2o3 /Co 3o4nfs和In 2o3nfs的灵敏度，并对样品的形貌、结构、化学成分和气敏性能进行了全面表征。结果表明:在2000℃条件下，引入co3o4可以提高In 2o3 / co3o4对丙酮的响应，分别达到29.52 (In 2o3 / co3o4)和12.34 (In 2o3)对200ppm丙酮的响应。此外，发现co2o3的掺杂使纯in2o3的最佳工作温度从275℃降低到200℃。co3o4和in2o3的复合不仅提高了传感性能，而且导致了p-n电导率型的转换。p-n转变现象与工作温度、氧化铟和氧化钴的比例有关。而In 2o3 /Co 3 O 4 NFs的丙酮传感性能增强可能是由于n型In 2 O 3和p型Co 3 O 4晶粒之间的p-n异质结促进了电子的迁移。此外，氮氧化合物与钴氧化合物之间的协同效应以及NFs的大比表面积也有助于提高其丙酮传感性能。
{"title":"Regulation of N-type In<sub>2</sub>O<sub>3</sub> Content on the Conductivity Type of Co<sub>3</sub>O<sub>4</sub> Based Acetone Sensor","authors":"Lijuan Fu, Shuxing Fan, Zhao Wang, Wei Tang","doi":"10.2478/msp-2023-0014","DOIUrl":"https://doi.org/10.2478/msp-2023-0014","url":null,"abstract":"Abstract A double-jet electrospinning method was adopted to fabricate In 2 O 3 /Co 3 O 4 nanofibers (NFs). The sensitivity of In 2 O 3 /Co 3 O 4 NFs and In 2 O 3 NFs were compared and analyzed, and the morphology, structure, chemical composition, and gas-sensing properties of the samples were comprehensively characterized. The results show that the introduction of Co 3 O 4 can improve the response of In 2 O 3 /Co 3 O 4 to acetone, to 29.52 (In 2 O 3 /Co 3 O 4 ) and 12.34 (In 2 O 3 ) to 200 ppm acetone at 2000°C, respectively. In addition, the doping of Co 3 O 4 was found to reduce the optimum working temperature of pure In 2 O 3 from 275°C to 200°C. The composite of Co 3 O 4 and In 2 O 3 not only enhances the sensing performance, but also leads to a conversion of p-n conductivity type. The phenomenon of the p-n transition is relevant to operating temperature and proportion of In 2 O 3 and Co 3 O 4 . While the enhanced acetone sensing properties of In 2 O 3 /Co 3 O 4 NFs may be attributed to the p-n heterojunction between n-type In 2 O 3 and p-type Co 3 O 4 crystalline grains, which promotes the electron migration. The synergistic effects between In 2 O 3 and Co 3 O 4 and the large specific surface area of NFs additionally contribute to the improvements of acetone sensing performance.","PeriodicalId":18269,"journal":{"name":"Materials Science-Poland","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135533465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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