Journal of the Australian Ceramic Society最新文献

{"title":"Theoretical study of structural, electronic, optical, thermoelectric and photovoltaic properties of chalcopyrite semiconductors AgGaTe2 and AgGaSe2 compounds for photocatalytic CO2 reduction","authors":"Benyamna Belkacemi,&nbsp;Nadia Benseddik,&nbsp;Norredine Marbouh,&nbsp;Fouzia Boukabrine","doi":"10.1007/s41779-024-01121-8","DOIUrl":"10.1007/s41779-024-01121-8","url":null,"abstract":"<div><p>We present a first principles investigation of structural, electronic, optical, thermoelectric, and photovoltaic properties of the chalcopyrite AgGaTe₂ and AgGaSe₂ compounds, using the full potential linearized augmented plane wave method, as part of the density functional theory. The calculated lattice parameters are in good agreement with the experimental and theoretical values. The band gaps energies of the studied systems were determined using different exchange-correlation functionals such as GGA-PBEsol, EV-GGA, YS-PBE0, and TB-mBJ methods. It is found that both compounds are semiconductors with a direct band gap (Γ-Γ). This direct band gap means that AgGaTe₂ and AgGaSe₂ materials can be used in the optical and optoelectronic devices. In accordance with this, the photovoltaic efficiency of the semiconducting was investigated using Solar Cell Capacitance Simulator-1D software. The best efficiencies of 23.76% and 17.52% were obtained at a thickness of 2.2 μm for AgGaTe₂ and AgGaSe₂ compounds, respectively. The lattice thermal conductivities for both compounds are remarkably low, with values at 300 K of 0.033 and 0.013 W×m^− 1×K^− 1 for AgGaTe₂ and AgGaSe₂, respectively. In addition, we studied the thermoelectric properties at room temperature, using semi-classical Boltzmann transport theory. The positive values of the Seebeck coefficient for both compounds exceed their absolute negative values, indicating that AgGaTe₂ and AgGaSe₂ are p-type materials. The obtained values of figure of merit for AgGaTe₂ and AgGaSe₂ are 0.70 and 0.81, respectively. The calculated results reveal that both chalcopyrites are potential thermoelectric materials. The band-gap edge potentials for AgGaTe₂ and AgGaSe₂ are − 0.65 eV and − 0.635 eV, respectively, which are below the required potential of -0.61 eV for CO₂ reduction to formic acid. This result means that AgGaTe₂ and AgGaSe₂ are suitable compounds for photocatalytic CO₂ reduction.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"1011 - 1025"},"PeriodicalIF":2.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165126","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}

{"title":"Fabrication of superparamagnetic spinel calcium ferrite nanoparticles by the auto-combustion sol-gel method and investigation of their structural, microstructural, and magnetic properties","authors":"S. E. Mousavi Ghahfarokhi,&nbsp;E. Mohammadzadeh Shobegar,&nbsp;H. Motamedi","doi":"10.1007/s41779-024-01117-4","DOIUrl":"10.1007/s41779-024-01117-4","url":null,"abstract":"<div><p>In this research, calcium ferrite nanoparticles (CaFe₂O₄) were first synthesized and structurally characterized by the self-combustion sol-gel method at temperatures of 300–700 ˚C and a time of 8 h, and then at a temperature of 400 ˚C and times of 2–10 h. Their microstructure and magnetism were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), atomic force microscope (AFM), and vibrating sample magnetometer (VSM). X-ray diffraction analysis showed that the manufactured samples have a spinel structure and the size of the nanocrystals was estimated between 7 and 12 nm and 4–10 nm at different temperatures and sintering times using Scherer’s equation. This study showed that a pure calcium ferrite sample (CaFe₂O₄) is formed at 400 ˚C temperature and 8 h time respectively. The presence of metal-oxide vibrational modes was confirmed by an infrared spectrometer (FT-IR) in calcium ferrite nanoparticles at all temperatures and sintering times. Field emission scanning electron microscope and transmission electron microscope analyses confirmed the nanostructure of calcium ferrite. Also, it showed that the shape of the nanoparticles is spherical and the size of the particles increased with increasing temperature and sintering time. To check the topography of the surface and study the microstructure of the samples, analysis (AFM) was performed. The results of this analysis showed that calcium ferrite nanoparticles have a uniform distribution and also, have a spherical shape with an average size of 18 nm. Magnetic properties of nanoparticles such as saturation magnetization (Ms) and magnetic coercive field (Hc) were investigated by vibrating sample magnetometer (VSM) at room temperature and the results showed that calcium ferrite nanoparticles have superparamagnetic behavior at different temperatures and sintering times. In addition, by measuring the Curie temperature (Tc) of the samples, it was observed that the Curie temperature decreases with the increase of the sintering temperature. In contrast the Curie temperature increases with the increase of the sintering time.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 section","pages":"285 - 300"},"PeriodicalIF":2.1,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121976","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}

{"title":"Investigation of dielectric transitions and impedance behavior in solid solutions of (1-x) K₀.₄₁Na₀.₅₉Nb₀.₉₅₉Sb₀.₀₄₁O₃-x(Bi₀.₅K₀.₅TiO₃), synthesized by solid state reaction method","authors":"Radheshyam Rai,&nbsp;Pratiksha Agnihotri,&nbsp;Shilpa Kumari,&nbsp;Mrinal Dutta","doi":"10.1007/s41779-024-01119-2","DOIUrl":"10.1007/s41779-024-01119-2","url":null,"abstract":"<div><p>In this study, we present the results of structural, impedance, modulus and conductivity analysis of (1-x) K_0.41Na_0.59Nb_0.959Sb_0.041O₃-x(Bi_0.5K_0.5TiO₃) (x = 0.01, 0.03, 0.05 and 0.07) (KNNS-BKT) polycrystalline ceramics prepared by the conventional solid-state reaction technique. The X-ray diffraction pattern (XRD) for all synthesized polycrystalline samples confirmed the formation of a pure perovskite phase. KNNS-BKT ceramics exhibit an orthogonal-tetragonal phase boundary at room temperature for composition x = 0.01 and 0.03. In the KNNS system, BKT induces a diffuse transition, but no significant shift in T_o−t and Tt-c with frequency is observed. A slight variation in lattice parameters was observed at different concentration of x in KNN-BKT ceramics. The average crystalline size and lattice strain of KNNS-BKT ceramics were evaluated by using the Williamson-Hall plot to study the composition dependence. The dielectric constant (ε) increased with higher concentration. All samples exhibited a NTCR semiconducting nature.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"995 - 1009"},"PeriodicalIF":2.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165641","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}

{"title":"Study on morphology, wear and corrosion resistance of ultrasonic-assisted pulse co-electrodeposited B4C reinforced Ni–P composite coating","authors":"Nuri Ergin","doi":"10.1007/s41779-024-01118-3","DOIUrl":"10.1007/s41779-024-01118-3","url":null,"abstract":"<div><p>The B₄C-reinforced Ni–P composite coatings were synthesized on low-carbon steel via ultrasonic-assisted electrodeposition. The optimal condition for producing co-electrodeposited Ni–P coating is to investigate the effects of concentrations of B₄C on the morphology, microstructure, surface roughness, hardness, elastic modulus, friction, wear, and electrochemical properties of the composite coating. Field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and energy dispersive spectrometer (EDS) were used to analyze the surface microstructure, crystallite size, morphology and composition of coating and content and distribution of the particles. The nanohardness and reduced elastic modulus of B₄C-reinforced Ni–P depositions was characterized by the nanoindentation technique. The friction and wear mechanism of the composite coatings was discussed in detail. The electrochemical properties of samples were studied via open circuit potential (OCP), potentiodynamic test and electrochemical impedance spectroscopy (EIS) in the 3.5% NaCl media. The experimental results indicated the highest elastic modulus and nano hardness (147 GPa and 6,92 GPa and the lowest wear rate (3.18 X 10^–8 mm³ /Nm) and average coefficient of friction (0,35) for coatings deposited at 20 gL⁻¹. Moreover, the corrosion resistance is significantly improved; this is shown via the low corrosion current density (I_corr value of 1.48 × 10^–3 A/cm²), the high corrosion potential (E_corr value of – 0.56 V), best corrosion rate (1.36 X10⁻⁵ mpy) and maximum R_ct of 181.8 kΩ cm². These results are attributed to the uniform distribution of the B₄C into nickel coating and the grain refinement effect of electrodeposited Ni–P coating. The formation of the B₄C core–shell structure on the coating surface improved the interfacial bond between the matrix and the ceramic particle, improving wear resistance and anti-corrosion performance.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"979 - 993"},"PeriodicalIF":2.1,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163456","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}

{"title":"Biphasic modified calcium phosphate: synthesis and antibacterial properties","authors":"Nataliia Strutynska,&nbsp;Iryna Grynyuk,&nbsp;Olga Vasyliuk,&nbsp;Yuriy Titov,&nbsp;Nataliia Golub,&nbsp;Mykola Slobodyanik","doi":"10.1007/s41779-024-01116-5","DOIUrl":"10.1007/s41779-024-01116-5","url":null,"abstract":"<div><p>The biphasic calcium phosphates (composite of hydroxyapatite and β-tricalcium phosphate) have significant interest due to the possibility of regulation of synthetic material bioresorption by varying ratio of its components. Biphasic calcium phosphates with different weight ratio of phases based on hydroxyapatite (Ca₁₀(PO₄)₆(OH)₂) and tricalcium phosphate (β-Ca₃(PO₄)₂) containing Na⁺ (1.1-1.2wt%), K⁺ (0.2-2.0wt%), Zn²⁺ (2.1wt%) and CO₃^2- (3.2wt%) have been prepared from aqueous solutions and heated to 500 °C. Comparison of calculated lattice parameters for both phases in obtained biphasic calcium phosphates with corresponding data for pure Ca₁₀(PO₄)₆(OH)₂ and β-Ca₃(PO₄)₂confirmed the incorporation of dopants in both phases. FTIR data indicate the partial substitution of РО₄^3-→СО₃^2-(B-type) in apatite-type calcium phosphate. It was found that modification of calcium phosphates with potassium cations and carbonate anions caused the faster partial dissolution of synthetic materials in the simulated solutions (PBS). The antibacterial activity of synthesized samples against <i>Staphylococcus aureus</i>,<i> Streptococcuspyogenes</i> and <i>Pseudomonas aeruginosa</i> has been evaluated. The influence of alkaline metal nature on effect of modified biphasic calcium phosphates on <i>S. aureus</i> and <i>P.aeruginosa</i> was found. The Na⁺-containing sample inhibited the growth of both <i>S. aureus</i> and <i>P.aeruginosa</i> microorganisms at adding its 20 mM while the K⁺-containing phosphate did not affect. The highest antibacterial effect against both <i>S. aureus</i> and <i>P. aeruginosa</i> was observed for Na⁺,K⁺,Zn²⁺-containing biphasic calcium phosphate. A five-fold inhibition of <i>S. aureus</i> cell growth was observed at adding of 10 mM of this sample, while <i>P.aeruginosa</i> cell growth was inhibited only at its higher amount (20 mM). It was found that all synthesized biphasic calcium phosphates didn’t effect on growth of the <i>Streptococcus pyogenes</i> strain.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"971 - 978"},"PeriodicalIF":2.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161939","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}

{"title":"Utilization of response surface methodology in the optimization of electrodeposition preparation of FTO/AuNPs electrodes","authors":"Van Vien Nguyen,&nbsp;Van Loc Thai,&nbsp;Hoang Long Ngo,&nbsp;Canh Minh Thang Nguyen,&nbsp;Hoa Thi Lai,&nbsp;Thanh Tung Nguyen,&nbsp;Viet Hai Le,&nbsp;Thai Hoang Nguyen","doi":"10.1007/s41779-024-01111-w","DOIUrl":"10.1007/s41779-024-01111-w","url":null,"abstract":"<div><p>In this research, gold nanoparticles coated on fluorine-doped tin oxide glass (AuNPs/FTO) electrodes were synthesized via electrodeposition of HAuCl₄ in H₃PO₄ using cyclic voltammetry. For response surface methodology (RSM), a central composite design model consisting of 16 runs with three different electrodeposition parameters, such as potential window, scan rate and cycle number was used to optimize the preparation parameters. Optimization and experimental data analysis using RSM were performed using Design Expert 11 statistical data analysis program. Data was fitted into a polynomial equation that shows all of the possible interactions of the parameters and their effects on the response (the electrocatalytic activity in the 5 × 10^-3 M K₃[Fe(CN)₆] in 0.5 M KNO₃ solutions by cyclic voltammetry). The optimized preparation parameters consist of potential window ranging from − 0.51 V to 0.6 V, scan rate of 81 mV.s^-1, and cycle number of 70, and with the current density of 965.909 µA.cm^-1. These factors have been compared with the experiment and the results show that there is no large error, which proves that the model can provide good repeatability and accurate optimization. For the As(III) determination, the sensitivity, LOD and LOQ values of the optimized electrode were found to be 1.5 µA.cm^-2.ppb^-1, 1.13 ppb and 3.43 ppb, respectively, indicating that the fabricated electrode can be applied for the determination of aqueous arsenic.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"909 - 922"},"PeriodicalIF":2.1,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170767","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}

{"title":"Preparation and property characterization of Zr-modified Si-O-C-based precursor ceramics through three-dimensional printing","authors":"Jia Lin,&nbsp;Shuai Wang,&nbsp;Yihang Yang,&nbsp;Guimei Huang,&nbsp;Jinhuo Wang","doi":"10.1007/s41779-024-01110-x","DOIUrl":"10.1007/s41779-024-01110-x","url":null,"abstract":"<div><p>In this study, Zr-modified Si-O-C precursor ceramics were prepared using three-dimensional (3D) printing. Ceramic sintering was completed by printing four precursors containing different zirconium acetylacetone contents. Comparative analysis was conducted on the ceramic yield, size shrinkage, mechanical properties, and microstructure. The results showed that the ceramic yield and size shrinkage of the four samples were increased with the increasing zirconium acetylacetone contents. The sample containing 30 wt% zirconium acetylacetone exhibited good compressive performance, with a compressive strength of 50.2 ± 0.6 MPa. Cracks were observed on the surface of samples containing 40 wt% zirconium acetylacetone, while those containing 10, 20, and 30 wt% zirconium acetylacetone were relatively intact. Therefore, a stable Si-Zr-O-C precursor ceramic with good mechanical properties, which can be used for 3D printing, was obtained.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 section","pages":"67 - 76"},"PeriodicalIF":2.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122586","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}

{"title":"Role of t-ZrO2 stabilization methods in phase composition, structure and properties of ZTA ceramics","authors":"Ruslan Kuzmin,&nbsp;Nina Cherkasova,&nbsp;Sergey Veselov,&nbsp;Daria Lazurenko,&nbsp;Anatoly Bataev","doi":"10.1007/s41779-024-01114-7","DOIUrl":"10.1007/s41779-024-01114-7","url":null,"abstract":"<div><p>In this study, alumina–zirconia ceramics with ZrO₂ components obtained using different methods were investigated. Synthesized undoped ZrO₂ powder, commercial powder of ZrO₂, doped with 3 mol% Y₂O₃ and commercial powder of monocline zirconia doped with 2 mol% ceria were used. Highly dispersed (D50 &lt; 100 nm) undoped zirconia was synthesized by precipitation from 1 M aqueous solution of ZrOCl₂-8H₂O with 25% aqueous ammonia solution. The resultant products were treated with water and isopropyl alcohol. Thermal treatment of the powder was carried out in a chamber furnace at a temperature beginning at 450 °C. Increasing the content of undoped ZrO₂ synthesized using the precipitation method increased the average size of ZrO₂ grains from 370 ± 20 nm to 560 ± 25 nm. During sintering of alumina-zirconia ceramics containing 20 vol% highly dispersed undoped zirconia, clusters of ZrO₂ particles unite to form large grains (800–1100 nm). Zirconia crystals with sizes less than 300 nm in the ceramic structure are observed inside and in the joints of Al₂O₃ grains. With the increase in total undoped zirconia content from 10 to 20 vol% in alumina–zirconia ceramics, the proportion of t-ZrO₂ remaining during sintering decreases from 6 to 2 vol%. The introduction of cerium nitrate into a suspension of monoclinic zirconia at the stage of dispersion leads to the formation of ceramic CeAl₁₁O₁₈ platelets with length of up to ~ 2 μm and width of ~ 0.15 μm. The bending strength is 800 ± 50 MPa and fracture toughness is 5.4 ± 0.7 MPa*m^1/2 in Al₂O₃–ZrO₂ ceramics containing 15 vol% zirconia doped with 2 mol% ceria.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 section","pages":"345 - 359"},"PeriodicalIF":2.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145122587","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}

{"title":"Structural, optical, and UV-light-driven-photocatalytic properties of Ag2MoO4-coated TiO2 nano/heterostructures","authors":"Mohsen Shahini,&nbsp;Mehdi Boroujerdnia,&nbsp;Azadeh Haghighatzadeh","doi":"10.1007/s41779-024-01112-9","DOIUrl":"10.1007/s41779-024-01112-9","url":null,"abstract":"<div><p>In this work, Ag₂MoO₄-coated TiO₂ nano/heterostructures were prepared via a two-step co-precipitation method as efficient UV-light-driven photocatalysts. The structural and optical properties of the as-prepared photocatalysts were studied by XRD, FT-IR, Raman spectroscopy, FESEM-EDS analysis and UV-Vis DRS. The formation of Ag₂MoO₄-coated TiO₂ nano/heterostructures was confirmed by observing weakened TiO₂ diffraction peaks, broadened FTIR hydroxyl absorption bands, shifted Raman scatterings and enhanced optical absorptions compared to the pure sample. The FESEM-EDS studies allowed the detection of the composition and distribution of Ag₂MoO₄ on the surface of TiO₂ structures. The photodegradation performance of the as-prepared Ag₂MoO₄-coated TiO₂ nano/heterostructures was evaluated by UV illumination over the degradation of methylene blue (MB). The photocatalytic results exhibited an improved photocatalytic performance for nano/heterostructured materials compared to sole TiO₂ photocatalyst relevant to the formed junction. The highest photocatalytic efficiency was found to be about 96.17% belonging to TiO₂/Ag₂MoO₄-3 sample with an increase about 1.19 times higher than that of Pure-TiO₂ (80.47%). A photocatalytic mechanism and a charge transfer route was discussed based on a Type II alignment scheme to justify the enhanced photocatlytic activity of nano/heterostructured Ag₂MoO₄-coated TiO₂ materials. Our findings provides a platform to design water treatment systems for potential applications to reach fresh and safe water sources.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"923 - 936"},"PeriodicalIF":2.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171446","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}

{"title":"Preparation of biomorphic porous SiC and SiO2 ceramics by sol infiltration into biotemplate followed by controlled sintering","authors":"Anwesha Maity,&nbsp;Nilanjan Santra,&nbsp;Nijhuma Kayal","doi":"10.1007/s41779-024-01108-5","DOIUrl":"10.1007/s41779-024-01108-5","url":null,"abstract":"<div><p>This study investigated the preparation of biomorphic porous silicon carbide (SiC) and silica (SiO₂) ceramics by controlled atmosphere heat treatment of silica sol infiltrated Gymnosperm pine wood derived carbon precursor. The SiO₂ -infiltrated carbon preform was heat-treated in the temperature range 1450–15,500 C in flowing argon and under vacuum to obtain porous SiC ceramics. The porous SiO₂ ceramic was obtained by heat-treatment of silica sol infiltrated C template in air at 1385^oC for 4 h. The effect of ceramization condition, the reaction mechanism, morphology of the porous ceramics and their phase composition were investigated. The grains of the microcellular SiC were found to be composed of nanocrystals and apparent crystallite size was found to be 123 nm.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"897 - 907"},"PeriodicalIF":2.1,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170210","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}