International Journal of Applied Ceramic Technology最新文献_第2页

Comparison of corrosion behavior of primary/modified nickel slag with semi-rebonded periclase-chromite refractory

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-24 DOI: 10.1111/ijac.14917

Hudie Yuan, Yuchi Liu, Hongfeng Yin, Yalou Xin, Yun Tang, Xiaohu Ren, Dongyun Gui

{"title":"Comparison of corrosion behavior of primary/modified nickel slag with semi-rebonded periclase-chromite refractory","authors":"Hudie Yuan, Yuchi Liu, Hongfeng Yin, Yalou Xin, Yun Tang, Xiaohu Ren, Dongyun Gui","doi":"10.1111/ijac.14917","DOIUrl":"https://doi.org/10.1111/ijac.14917","url":null,"abstract":"Semi-rebonded periclase-chromite refractories are commonly utilized in the working lining section of the molten pool in oxygen-enriched top-blowing furnaces for nickel production. Its resistance to nickel slag corrosion determines the safety and service life of the melting furnace. The composition of nickel slag influences the corrosion resistance of semi-rebonded periclase-chromite refractories. By comparing and analyzing specimens corroded by primary and modified nickel slag, the influence mechanism of w(CaO)/w(SiO2) variations on corrosion resistance of semi-rebonded periclase-chromite refractories was clarified. The results show that a spinel isolation layer is preferred to form at a lower w(CaO)/w(SiO2) ratio (< 0.576) and enhance the corrosion resistance of semi-rebonded periclase-chromite refractories. As the ratio increases, the slag viscosity falls and the corrosion products contain larger levels of Ca3Cr2Si3O12 and Ca3MgSi2O8, which prevent the creation of the isolation layer and establish a conduit for Ca2+ and Si4+ transport and reaction into the interior of the refractory.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762835","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}

引用次数: 0

Synthesis and characterization of the doped/co-doped SnO2 nanoparticles by the sol–gel method

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-23 DOI: 10.1111/ijac.14916

Fatma Aydın Ünal

{"title":"Synthesis and characterization of the doped/co-doped SnO2 nanoparticles by the sol–gel method","authors":"Fatma Aydın Ünal","doi":"10.1111/ijac.14916","DOIUrl":"https://doi.org/10.1111/ijac.14916","url":null,"abstract":"Tin oxide (SnO2) is one of the important semiconductors used in the application of solar cells because of its chemical–mechanical stability and wide band gap. These properties are very important for the performance development and photoanode optimization of a dye-sensitized solar cell (DSSC). However, the low conduction band value of SnO2 reduces the photovoltaic efficiency, which limits the application of DSSC. Therefore, the doping strategy was used to increase the sensitivity to the visible light spectrum and change the light absorption properties of SnO2. In this paper, pure SnO2, Ag/SnO2, Pt/SnO2, and Pt/Ag/SnO2 nanoparticles were synthesized at the nanoscale by a simple chemical sol–gel method. To characterize the structure, morphological/chemical properties, optical properties, and surface properties of the synthesized SnO2 nanoparticles, X-Ray Diffraction (XRD), ultraviolet–visible, Brunauer–Emmett–Teller, Scanning Electron Microscopy (SEM)/Energy Dispersive X-Ray Spectroscopy (EDX), Transmission Electron Microscopy (TEM), and particle size analysis were respectively used. XRD results showed that the crystal sizes varied between 8.8 and 12.2 nm depending on the doping. Doping processes resulted in reductions in particle sizes. Optical studies resulted in decreases in the band gap with the doping process. The conclusions obtained have shown that Ag doping, and Pt–Ag co-doping can be promising for use as photoanode materials in semiconductor technology and especially in DSSC applications.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ijac.14916","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of tribocatalytic performance by modifying the concentration of oxygen vacancies in KSr2Nb4TaO15 ceramics

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-19 DOI: 10.1111/ijac.14912

Shirong Lin, Yingzhi Meng, Changbing Pan, Zhi Yuan, Luanhai Ou, Shanjun Ke, Changzheng Hu, Xiuyun Lei, Laijun Liu

{"title":"Optimization of tribocatalytic performance by modifying the concentration of oxygen vacancies in KSr2Nb4TaO15 ceramics","authors":"Shirong Lin, Yingzhi Meng, Changbing Pan, Zhi Yuan, Luanhai Ou, Shanjun Ke, Changzheng Hu, Xiuyun Lei, Laijun Liu","doi":"10.1111/ijac.14912","DOIUrl":"https://doi.org/10.1111/ijac.14912","url":null,"abstract":"In recent years, catalytic degradation driven by mechanical-energy tribocatalysis has gained much attention. Point defects play very important on the catalytic activity of ferroelectric oxides. In this study, we focus on the influence of oxygen vacancies on the catalyst performance of ferroelectric oxide KSr2Nb4TaO15 (KSNT) with a tetragonal tungsten bronze structure. The concentration of oxygen vacancies is modified by sintering atmosphere. The KSNT sintered in N2 atmosphere exhibits the best tribocatalytic degradation efficiency of 96.7% within 2 h for degradation rhodamine B due to high concentration of oxygen vacancies. The excellent degradation efficiency is attributed to the defect energy level of KSNT and high electron–hole separation efficiency. This work reveals the relationship between oxygen vacancies and tribocatalysis efficiency, which is helpful to design and modify the new ferroelectric oxides for tribocatalysis.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762614","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}

引用次数: 0

Slurry material extrusion of chopped carbon fiber reinforced silicon carbide ceramic matrix composites (CMCs)

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-19 DOI: 10.1111/ijac.14915

Kyle R. Cox, Tess D. Marconie, Raina A. Shreiner Barger, Karan M. Motwani, Jeffrey P. Youngblood, Rodney W. Trice

{"title":"Slurry material extrusion of chopped carbon fiber reinforced silicon carbide ceramic matrix composites (CMCs)","authors":"Kyle R. Cox, Tess D. Marconie, Raina A. Shreiner Barger, Karan M. Motwani, Jeffrey P. Youngblood, Rodney W. Trice","doi":"10.1111/ijac.14915","DOIUrl":"https://doi.org/10.1111/ijac.14915","url":null,"abstract":"Silicon carbide (SiC) is a useful high temperature ceramic due to its excellent mechanical properties and oxidation resistance. In this study, monolithic SiC and chopped carbon fiber reinforced (Cf)/SiC ceramic matrix composites (CMCs) were additively manufactured via direct ink writing (DIW). Samples employing five different print paths were prepared from SiC and 10 vol.% Cf/SiC inks. All parts were pressurelessly sintered, with relative densities of 96% measured for samples prepared from both inks. Electron and optical microscopy were used to show a high degree of fiber alignment parallel to the direction of the print. Thus, CMC architectures consistent with the print paths were created when printing the 10 vol.% Cf/SiC inks. Characteristic flexure strengths for monolithic SiC and 10 vol.% Cf/SiC CMC samples were the same for the 0° print path, measuring 360–375 MPa. Fiber pullout was observed on the fracture surface of the 10 vol.% Cf/SiC CMCs. The Weibull modulus for the 10 vol.% Cf/SiC CMC samples (10.7) was greater than the monolithic SiC samples (7.4); the trend of fibers narrowing the distribution of failure strengths was consistent for the other print paths investigated.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ijac.14915","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alumina densification at low temperatures using CaV2O6 for LTCC application

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-19 DOI: 10.1111/ijac.14922

Raji Saraswathy, Basheer Masin, Karunanidhi Ashok, HariharaIyer Sreemoolanadhan, Kuttan Prabhakaran

{"title":"Alumina densification at low temperatures using CaV2O6 for LTCC application","authors":"Raji Saraswathy, Basheer Masin, Karunanidhi Ashok, HariharaIyer Sreemoolanadhan, Kuttan Prabhakaran","doi":"10.1111/ijac.14922","DOIUrl":"https://doi.org/10.1111/ijac.14922","url":null,"abstract":"Low-temperature densification of alumina using calcium vanadate (CaV2O6, CV) having a similar dielectric constant as a liquid-forming additive has been studied. The alumina‒CV composites containing 20‒40 vol.% CV achieve ∼94% of theoretical density at low temperatures of 1100°C‒900°C by liquid-phase sintering. A reduction in the average size of grains from .87 to .42 µm with a surge in CV amount from 20 to 40 vol.% is observed. The permittivity decreases from 9.2 to 8.90, and the dielectric loss increases from 2.154 × 10‒3 to 4.761 × 10‒3 when the amount of CV in the alumina‒CV composite rises from 20 to 40 vol.%. The temperature coefficient of resonance frequency, thermal expansion coefficient, and thermal conductivity of the alumina‒CV composites are observed in the ranges of ‒54 to ‒72 ppm °C‒1, 6.94‒7.32 ppm °C‒1, and 13.78‒8.02 W m‒1 K‒1, respectively. The compatibility of the composites with Ag for low-temperature co-fired ceramics (LTCC) application is established through co-sintering and energy-Dispersive X-ray spectroscopy line spectra analysis. The low-temperature densification, acceptable range of dielectric and thermal properties, and silver compatibility make the alumina‒CV composite a candidate for LTCC application.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762616","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}

引用次数: 0

Improvement of BGO ceramic scintillators through hot-pressing sintering methodology

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-18 DOI: 10.1111/ijac.14911

Ivus L. O. Matos, Adriano B. Andrade, Joana S. B. Batista, Tatiane S. Lilge, Zélia S. Macedo, Mário E. G. Valerio

{"title":"Improvement of BGO ceramic scintillators through hot-pressing sintering methodology","authors":"Ivus L. O. Matos, Adriano B. Andrade, Joana S. B. Batista, Tatiane S. Lilge, Zélia S. Macedo, Mário E. G. Valerio","doi":"10.1111/ijac.14911","DOIUrl":"https://doi.org/10.1111/ijac.14911","url":null,"abstract":"In the present work, the sintering of bismuth germanate through hot pressing and the improvement of scintillator performance were investigated. The linear shrinkage, crystalline structure, microstructure, transparency degree, and radioluminescence (RL) were studied as functions of the sintering pressure. X-ray diffraction revealed that the samples were predominantly composed of the Bi4Ge3O12 phase, accompanied by small amounts of Bi12GeO20, with concentrations varying according to the sintering parameters. These concentrations were quantified through Rietveld refinement, which also indicated a tendency for the cell parameters to shrink as the sintering pressure increased. The microstructure of the ceramic pellets produced under varying hot-pressing parameters was investigated using scanning electron microscopy (SEM), revealing that while the grain size was preserved, the porosity and grain boundary thickness were reduced by the hot pressing, forming a quasicontinuum in some areas of the sample. The RL of all the samples exhibited a green color, with a maximum at 540 nm, ascribed to the transitions from the 3P0,1,21P1 excited states to the fundamental 1S0 state of the Bi3+ ions. For samples sintered under a pressure of .18 MPa, the enhancement in the optical transmittance, accompanied by a 61.36% increase in light output at the maximum wavelength, was observed.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762795","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}

引用次数: 0

Lightning damage characteristics of Cf/SiC based on ultrasonic and multi-nondestructive testing methods

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-18 DOI: 10.1111/ijac.14913

Xiaojin Gao, Chengyu Liang, Liang Fu, Jiasheng Chen, Hui Mei, Laifei Cheng, Litong Zhang

{"title":"Lightning damage characteristics of Cf/SiC based on ultrasonic and multi-nondestructive testing methods","authors":"Xiaojin Gao, Chengyu Liang, Liang Fu, Jiasheng Chen, Hui Mei, Laifei Cheng, Litong Zhang","doi":"10.1111/ijac.14913","DOIUrl":"https://doi.org/10.1111/ijac.14913","url":null,"abstract":"According to the characteristics of the internal damage of the Cf/SiC composite material after the lightning strike, this article establishes a high-energy ultrasonic excitation, reception, and high-resolution ultrasonic testing model, achieving high-energy and high-resolution ultrasound C-scan detection of Cf/SiC composite material samples after lightning strikes, and combining digital X-ray and computed tomography methods for damage analysis. When the lightning energy is gradually increased, the lightning stratified damage will occur inside the sample, and the delamination damage area reaches the maximum value of 25182 mm2 at the lightning energy of S4. Subsequently, as the energy increases, significant needle-like damage is generated at the needle-stitched area inside the sample, and the area of delamination damage gradually decreases. When the energy continues to increase to the lightning strike energy of S6, as the energy increases, the number of needle-like damage in the sample continues to grow, and penetrating injury appears at the needle suture site. At S8, the maximum number of needle-like lightning damage occurred, with 53 damage points and a total volume of 256.86 mm3, respectively. Through comprehensive analysis, Cf/SiC has excellent resistance to lightning damage, but the needle-stitched carbon fiber in the thickness direction significantly reduces its resistance to lightning penetration.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762794","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}

引用次数: 0

The crack-healing behavior and oxidation resistance of Al2O3–ZrO2–SiB6 ceramic at 600–1200°C 600-1200°C 下 Al2O3-ZrO2-SiB6 陶瓷的裂缝愈合行为和抗氧化性

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-13 DOI: 10.1111/ijac.14889

Haopeng Cai, Kun Jiang, Lihua Gao, Yinglong Wei

{"title":"The crack-healing behavior and oxidation resistance of Al2O3–ZrO2–SiB6 ceramic at 600–1200°C","authors":"Haopeng Cai, Kun Jiang, Lihua Gao, Yinglong Wei","doi":"10.1111/ijac.14889","DOIUrl":"10.1111/ijac.14889","url":null,"abstract":"In this paper, we prepared Al2O3–ZrO2–SiB6 composite ceramics with excellent performance by introducing the second-phase high-strength healing agent SiB6 in zirconia-toughened alumina system, artificially created cracks using Vickers hardness tester, investigated the effects of heat treatment temperature (600–1200°C) and time (0–300 min) on the microscopic morphology and bending strength of the ceramics, revealed the healing mechanism, and studied the oxidation resistance properties. It was found that the healing effect was better at heat treatment of 90 min at 700°C and 60 min at 800°C, and the flexural strength was restored to more than 95% of that of the smooth specimens in both cases. Crack repair was mainly achieved by the reaction of SiB6, ZrB2, and B4C with O2. Below 800°C, healing was mainly achieved by the reaction of SiB6 and B4C with O2, and the generated B2O3 and SiO2 migrated toward the crack to repair it. When the healing temperature is higher than 800°C, ZrB2 also reacts with oxygen to produce B2O3 and t-ZrO2. It was found that the oxidation weight gain per unit area of the Al2O3–ZrO2–SiB6 ceramic composite at different temperatures was small, and it has excellent oxidation resistance.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257762","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}

引用次数: 0

Fabrication and characterization of silicon carbide ceramic filtration media via recycling of waste red mud 通过回收利用废弃赤泥制作碳化硅陶瓷过滤介质并确定其特性

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-13 DOI: 10.1111/ijac.14908

Nilanjan Santra, Tamal Ghosh, Nijhuma Kayal

引用次数: 0

The effect of MnO2 additive on the microstructure and mechanical properties of magnesium aluminate spinel MnO2 添加剂对铝酸镁尖晶石微观结构和力学性能的影响

IF 1.8 4区材料科学

International Journal of Applied Ceramic Technology Pub Date : 2024-09-10 DOI: 10.1111/ijac.14907

Guo-rong Ji, Ming Feng, Huilan Hao, Yunfeng Gao, Baoshun Zhu, Yu-ming Tian

{"title":"The effect of MnO2 additive on the microstructure and mechanical properties of magnesium aluminate spinel","authors":"Guo-rong Ji, Ming Feng, Huilan Hao, Yunfeng Gao, Baoshun Zhu, Yu-ming Tian","doi":"10.1111/ijac.14907","DOIUrl":"10.1111/ijac.14907","url":null,"abstract":"In this study, varying amounts of MnO2 up to 5 wt.% were added to magnesium aluminate spinel (MA) bodies using a solid-state sintering method at 1200–1600°C. The effect of MnO2 addition on the phase composition, microstructure, distribution of elements, and ionic valence of MA was investigated via X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, and X-ray photoelectron spectroscopy, respectively. The results showed that Mg2+ ions in MA crystals were replaced by Mn2+ ions, resulting in the formation of the (Mg1-xMnx)Al2O4 solid solution. The distorted crystal structures promoted the sintering reactions, and the mechanical characteristics of MA were greatly improved by the solid solution strengthening process. When the additive amount of MnO2 was 5 wt.% and the sintered temperature reached at 1600°C, excess manganese ions hardly dissolved into the lattice of MA. And these ions were only distributed at the grain boundaries of MgAl2O4, forming a “barrier” that hindered the migration and diffusion of particles, thereby suppressing the sintering process and weakening the mechanical strength of MA.","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"22 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142180359","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}

引用次数: 0