Journal of the American Ceramic Society最新文献

{"title":"Thermodynamic study on the phase assemblage of MPC exposed to natural and accelerated carbonation conditions","authors":"Weiwei Han,&nbsp;Huisu Chen,&nbsp;Shaomin Song","doi":"10.1111/jace.20247","DOIUrl":"https://doi.org/10.1111/jace.20247","url":null,"abstract":"<p>Magnesium phosphate cement (MPC), which belongs to chemically bonded phosphate ceramics, is commonly applied as a repair material and waste stabilization/solidifications. However, studies on the influence of CO₂ on the phase assemblages in MPC are limited. A thermodynamic simulation approach is employed to explore the influence of CO₂ on the equilibrium phase assemblage of MPC. The mechanisms of natural and enforced carbonation of MPC have been investigated in this work. The results disclose that Mg carbonates are less likely to precipitate in magnesium ammonium phosphate cement (MAPC) cured under CO₂, while MgCO₃·3H₂O is the only carbonation product of magnesium potassium phosphate cement (MKPC). The carbonation resistance of MAPC is better than that of MKPC. The increase of activity of magnesia employed in MPC obviously enhances the formation of brucite and slightly promotes the carbonation of MPC.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extending interfacial toughness and thermal cycling lifetime of thermal barrier coatings via interfacial 3D pattern","authors":"Lirong Luo,&nbsp;Weize Wang,&nbsp;Xiancheng Zhang,&nbsp;Jie Lu,&nbsp;Fangwei Guo,&nbsp;Xiaofeng Zhao","doi":"10.1111/jace.20254","DOIUrl":"https://doi.org/10.1111/jace.20254","url":null,"abstract":"<p>Weak interface bonding is a critical factor that compromises the long-term durability of the thermal barrier coatings. To mitigate this, we introduce an innovative interface-strengthening approach by integrating four types of 3D patterns at the top coat/bond coat interface using the laser cladding technique. Tensile tests demonstrate a significant enhancement in interfacial bonding strength, increasing by over 139.2% from 21.6 ± 1.7 MPa for conventional thermal barrier coatings without patterns to 51.67 MPa for the patterned coatings. Moreover, the thermal cycling lifetime has been extended by 41%, from 1026 ± 25 cycles for the conventional coating to 1936 ± 164 cycles for the patterned coating. This enhancement in interfacial toughness and thermal cycling lifetime is primarily because of the blocking and deflection effects of 3D patterns on interfacial crack propagation. Besides, the geometric parameters of the patterns play a crucial role in determining the failure behavior of the thermal barrier coatings. This strategy presents a practical solution for the development of durable thermal barrier coatings and provides the valuable insights for the optimization of other heterogeneous interfaces.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monocarboluminate: Sorption dependence of thermal, elastic, and transport properties","authors":"Tulio Honorio","doi":"10.1111/jace.20246","DOIUrl":"https://doi.org/10.1111/jace.20246","url":null,"abstract":"<p>Monocarboaluminate is the major phase in calcium aluminate cements and is the main AFm phase in modern cement that incorporates limestone additions, including limestone calcined clay cement. This study reports thermal, elastic, and transport properties of monocarboaluminate obtained from molecular simulations. Properties and structural features are computed as a function of the relative humidity (RH) and water content. Full elastic, thermal expansion and thermal conductivity tensors are provided. Quantum-corrected estimates are provided for the heat capacity and thermal conductivity. Self-diffusion of interlayer species is also quantified, accounting for the subdiffusive regime. This work contributes to completing property data for critical phases in cement systems.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20246","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Liquidus of SiO2 in the Li2O-SiO2, Na2O-SiO2, and K2O-SiO2 systems","authors":"Jaesung Lee,&nbsp;Paloma Lauriano,&nbsp;In-Ho Jung","doi":"10.1111/jace.20255","DOIUrl":"https://doi.org/10.1111/jace.20255","url":null,"abstract":"<p>The phase equilibria in the SiO₂-rich region of the Li₂O-, Na₂O-, and K₂O-SiO₂ systems at 1550°C to 1650°C were experimentally studied to determine accurate liquidus of SiO₂ in the systems. A classical equilibration/quenching method was used, and the equilibrated samples were analyzed by X-ray diffraction (XRD) and electron probe microanalysis (EPMA). Samples were contained in sealed Pt crucibles and held at the target temperatures for 7–21 days to reach equilibrium condition. Sealed Pt crucibles were employed to avoid the volatile loss of alkali oxides during high temperature phase equilibration and hydration upon quenching. Accurate liquidus of SiO₂ in alkali-silicate systems was determined for the first time, and the results were analyzed using the limiting slope rule in order to understand the dissolution behavior of alkali oxides in SiO₂ melt. It was confirmed that alkali oxide dissolves in SiO₂ melt by producing Li⁺, Na⁺, and K⁺ cationic species rather than Li₂²⁺, Na₂²⁺ and K₂²⁺ species.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamic modeling of the structure of alkali aluminophosphate glasses and their ionic conductivity","authors":"Alberto López-Grande,&nbsp;Francisco Muñoz","doi":"10.1111/jace.20242","DOIUrl":"https://doi.org/10.1111/jace.20242","url":null,"abstract":"<p>This study presents the structural and ionic conductivity thermodynamic modeling for glasses with compositions in the system 50M₂O-xAl₂O₃-(50 − x)P₂O₅, with M = Li or K. The Shakhmatkin and Vedishcheva thermodynamic model (SVTDM), or associated solutions model, has been previously used in successfully predicting the structure of simple binary phosphate glasses and it has now been employed with the aim to discerning the model's capability to predict the structural changes induced in the phosphate network by the addition of alumina. The results have been furthermore validated through their comparison with literature experimental data on the structural characterization of the glasses by ³¹P NMR measurements as well as on ionic conductivity determined by impedance spectroscopy. Although this methodology demonstrates good agreement with experimental data on the structure of aluminophosphate glasses, some disparities persist, potentially arising from experimental uncertainties. However, SVTDM faces limitations, including the need for comprehensive knowledge of stable phases and their formation energies. Predictions of ionic conductivity, though promising, exhibit deviations from experimental values, attributed to factors such as the influence of the chemical environment on dielectric properties. To enhance accuracy in conductivity prediction, a deeper understanding of additional variables such as dielectric constant and attempt frequency is imperative.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A practical analysis to predict sample overheating in flash experiments using the current ramp methodology","authors":"Alejandro F. Manchón-Gordón,&nbsp;Sandra Molina-Molina,&nbsp;Antonio Perejón,&nbsp;Pedro Sánchez-Jiménez,&nbsp;Luis A. Pérez-Maqueda","doi":"10.1111/jace.20248","DOIUrl":"https://doi.org/10.1111/jace.20248","url":null,"abstract":"<p>This work presents a straightforward strategy for achieving specific overheating during flash experiments by adjusting the initial electrical parameters. To do that, an extensive experimental analysis was performed to evaluate the temperature evolution of dense ZnO specimens during controlled-current ramping at different furnace temperatures, which in turn modified the initial electrical resistance of the sample. A detailed electrical explanation of controlled-current ramp flash processes is provided and, for the first time, a practical equivalence between current-ramp and temperature-ramp flash methodologies is established. By parameterizing the experiments in terms of an effective power density, a consistent heating pattern following the blackbody radiation trend was identified, despite the different electrical characteristics of each experiment. Finally, a “flash heating map” is introduced, which can be used to determine the starting electrical parameters necessary to achieve a specific temperature increase, whether employing current or temperature ramps.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jace.20248","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Observation of Griffiths phase and giant magnetocaloric effect in double perovskite oxide RE2FeCrO6 (RE = Gd, Tb, Dy, Er)","authors":"Siyu Deng,&nbsp;Yue Li,&nbsp;Xiansong Liu,&nbsp;Shuangjiu Feng,&nbsp;Hongling Yang,&nbsp;Jian Yang,&nbsp;Linghua Jin,&nbsp;Xucai Kan,&nbsp;Shouguo Wang","doi":"10.1111/jace.20239","DOIUrl":"https://doi.org/10.1111/jace.20239","url":null,"abstract":"<p>The magnetic properties of double perovskite oxide RE₂FeCrO₆ (RE = GD, Tb, Dy, Er) were systematically studied, and the Griffiths phase evolution was observed. In Tb₂FeCrO₆, Dy₂FeCrO₆, and Er₂FeCrO₆, there are antiferromagnetic (AFM)-ferromagnetic (FM) first-order phase transition and the Griffiths phase with coexistence of FM and paramagnetic (PM) was observed by the EPR spectra. Gd₂FeCrO₆ has an AFM–PM second-order phase transition, and there is no first-order phase transition in the range of ∆<i>H </i>= 0–50 kOe. As the temperature decreases, all four sets of samples present <i>χ</i>⁻¹ (<i>T</i>) deviates downwards from the Curie–Weiss linear behavior from 0.2 to 5 kOe, corresponding to the typical characteristics of Griffiths phase evolution. In addition, all four sets of samples have excellent magnetocaloric performance. Especially, the Gd₂FeCrO₆ oxide has giant magnetic entropy change and relative cooling power (−∆<i>S</i>_M^max = 30.31 J/kg K and RCP = 312.8 J/kg when ∆<i>H </i>= 50 kOe). From the perspective of low-temperature magnetic refrigeration application, the present work provides important candidate references for magnetic component researchers.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low sintering shrinkage and high strength of porous mullite–zirconia ceramics: Effect of AlF3 and ZrSi2 contents","authors":"Yueqi Shao,&nbsp;Chenhe Xia,&nbsp;Jie Xu,&nbsp;Hanke Wang,&nbsp;Xiaoying Feng,&nbsp;Feng Gao","doi":"10.1111/jace.20243","DOIUrl":"https://doi.org/10.1111/jace.20243","url":null,"abstract":"<p>Low-shrinkage porous mullite–zirconia ceramics were prepared using Al and ZrSi₂ as raw materials and AlF₃ as the whisker catalyst through foam-gelcasting and freeze-drying methods. The oxidation of Al and ZrSi₂ combined with the Kirkendall effect and volume expansion was employed to reduce the sintering shrinkage, while the mullitization was promoted by the reaction between AlF₃ and extra ZrSi₂, and ZrO₂ were generated to enhance the compressive strength as the reinforcing phase. The effect of AlF₃ and ZrSi₂ content on the microstructure and properties of porous mullite-zirconia were explored. These ceramics exhibited high porosity (73.75%–85.02%) and compressive strength (2.98–17.71 MPa), low shrinkage (0.47%–10.89%) and thermal conductivity (0.228–0.462 W/(m·K)). In particular, the porous mullite–zirconia ceramics with great compressive strength (4.01 MPa) companied with near-zero shrinkage (0.47%) at the AlF₃ content of 15 wt% and extra ZrSi₂ content of 20 wt% by introducing the reinforcing phase (ZrO₂). Additionally, the temperature difference around 950°C of the porous ceramics during the heating test proved the exceptional application on thermal insulation.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-reduction triggered color tuning of Eu3+-doped aluminosilicate glass for solid-state white illumination","authors":"Hang Chen,&nbsp;Chunming Zhou,&nbsp;Xu Chen,&nbsp;Chang Min,&nbsp;Shenghui Lin,&nbsp;Yanbin Li,&nbsp;Tianyuan Zhou,&nbsp;Jian Kang,&nbsp;Chaofan Shi,&nbsp;Cen Shao,&nbsp;Pengde Han,&nbsp;Wieslaw Strek,&nbsp;Hao Chen,&nbsp;Le Zhang","doi":"10.1111/jace.20237","DOIUrl":"https://doi.org/10.1111/jace.20237","url":null,"abstract":"<p>Rare earth-doped transparent glass, boasting high transmittance and excellent luminescent properties, holds great potential in the field of all-inorganic solid-state white illumination. Currently reported single-structure solid-state white lighting usually has the problems of low color rendering index (CRI) and high correlated color temperature (CCT) due to the lacking of red light emission. In this work, a novel single-structure MgO–Al₂O₃–SiO₂–Eu₂O₃ (MAS: Eu) glass with color tuning was prepared by the simple glass melting process. Interestingly, the prepared Eu³⁺-doped aluminosilicate glass possessed a unique capability to achieve color emission under different excitation wavelengths. The reason for this was attributed to the good self-reduction capability of the MAS glass, which effectively reduced Eu³⁺ to Eu²⁺ under an air atmosphere. Meanwhile, only by regulating the Eu³⁺ doping concentration, the MAS glass also achieved a tunable emission from blue to white to red light under 380 nm excitation. The acquisition of white light was realized through the multispectral emission of blue–green light emitted by Eu²⁺ and orange–red light emitted by Eu³⁺. Remarkably, the single-structure MAS glass doped with 8 wt.% Eu³⁺ successfully achieved high-quality white light and high thermal stability, exhibiting a high CRI of 86, a low CCT of 2761 K, good chromaticity parameters of (0.407 and 0.3192), and the emission intensity at 423 K remains above 86.35% that of room temperature. Meanwhile, the doped Eu³⁺ exceeded 12 wt.%, without any observable concentration quenching. Moreover, the MAS: Eu glass showed a high transmittance of 90 and a moderate thermal conductivity of 1.45 W/mK (epoxy resin ∼0.17 W/mK). These results would dramatically inspire the development of high-quality solid-state white lighting applications.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An innovative approach to study the influence of microstructure on thermal shock resistance of porous ceramics","authors":"Jinping Cui,&nbsp;Kang Guan,&nbsp;Pinggen Rao,&nbsp;Qingfeng Zeng,&nbsp;Jiantao Liu","doi":"10.1111/jace.20236","DOIUrl":"https://doi.org/10.1111/jace.20236","url":null,"abstract":"<p>Porosity is a critical microstructural factor in ceramic materials, influencing their mechanical and thermal properties. However, the detailed mechanisms through which porosity, grain size, and grain boundary fracture energy affect the thermal shock resistance of porous ceramics are still not fully understood. This study introduces a dual-scale model that integrates these microstructural parameters to predict fracture toughness and thermal shock resistance. Using the single-edge V-notch fracture toughness testing principle, we calculate the thermal stress intensity factor and establish its relationship with temperature differentials. The critical temperature differential, which marks the onset of thermal shock damage, is determined when the thermal stress intensity factor reaches the fracture toughness threshold. The model reveals a significant interplay between porosity, grain size, and grain boundary fracture energy, with fine-grained ceramics (grain size &lt; 10 µm) showing a sharp decrease in fracture toughness as porosity increases, while coarser-grained ceramics are less affected by porosity. These findings provide a deeper understanding of the microstructural optimization needed to enhance the thermal shock resistance of high-performance porous ceramics.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 3","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143112263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}