Journal of the American Ceramic Society最新文献

{"title":"Phase equilibria in the CuO0.5–SbO1.5–SiO2 system","authors":"Hamed Abdeyazdan,&nbsp;Maksym Shevchenko,&nbsp;Evgueni Jak","doi":"10.1111/jace.70123","DOIUrl":"10.1111/jace.70123","url":null,"abstract":"<p>Phase equilibria information are significant for optimizing recovery of Sb in industrial Cu production. An integrated experimental and thermodynamic modeling investigation of the phase equilibria in the CuO_0.5–SbO_1.5–SiO₂ system has been undertaken to characterize the distribution of Sb between high-Cu slags and matte/metal phase in the Cu processing reactors. New experimental phase equilibria data at 600–1500°C were obtained for this system using high-temperature equilibration of synthetic mixtures with predetermined compositions in sealed silica ampoules or Cu foils, a rapid quenching technique, and electron probe x-ray microanalysis of the equilibrated phase compositions. Phase equilibria and liquidus isotherms in the cuprite Cu₂O, quartz/tridymite/cristobalite SiO₂, valentinite Sb₂O₃, and cervantite Sb₂O₄ primary phase fields were measured, and the extent of the high-SiO₂ 2-liquid immiscibility gap in equilibrium with cristobalite was determined. Experimental results were used to fix thermodynamic parameters in the CuO_0.5–SbO_1.5 binary and the CuO_0.5–SbO_1.5–SiO₂ ternary systems. Moreover, the solubility of Sb in the metal phase (predominantly Cu) was predicted reasonably through the thermodynamic database. The information obtained in this study is important for recycling critical metal Sb with increasing demand in the ceramic and glass applications as well as low-carbon energy production.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70123","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929661","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":"Sm2O3-modified Pb(Ni,Ta)O3–Pb(Zr,Ti)O3–MnO2 ceramics with high piezoelectric and electromechanical coupling properties","authors":"Yufang Jiao,&nbsp;Junjun Wang,&nbsp;Jian He,&nbsp;Bingsen Wang,&nbsp;Yan Mu,&nbsp;Meng Liu,&nbsp;Che Sun,&nbsp;Danqing Liu,&nbsp;Fengmin Wu","doi":"10.1111/jace.70131","DOIUrl":"10.1111/jace.70131","url":null,"abstract":"<p>The emerging electromechanical equipment urgently needs piezoelectric materials with a high mechanical mass factor (<i>Q</i>_m) and large piezoelectric coefficient (<i>d</i>₃₃), large electromechanical coupling coefficient <i>k</i>_p, and good temperature stability. Unfortunately, the <i>Q</i>_m of piezoelectric ceramics is inversely proportional to <i>d</i>₃₃, which limits their practical application. If the appropriate acceptor and donor dopants can be added to the piezoelectric ceramics, high <i>Q</i>_m and large <i>d</i>₃₃ can be achieved simultaneously. Here, we try to achieve high mechanical mass factor and good electromechanical coupling coefficient in 0.12Pb(Ni_1/3Ta_2/3)O₃–0.44PbZrO₃–0.44PbTiO₃ (PNT–PZT) ceramics by co-doping Sm₂O₃ and MnO₂ without sacrificing the piezoelectric constant. PNT–PZT–Mn–<i>x</i>Sm ceramics were prepared by conventional sintering method. When <i>Q</i>_m = 828, <i>d</i>₃₃ = 449 pC/N, FOM = 3.72 × 10⁵, <i>T</i>_C = 264°C, and <i>k</i>_p = 0.6158, the performance of PNT–PZT-Mn-0.015Sm ceramics is the best. The high <i>Q</i>_m is related to the hardening effect of doped MnO₂, and the high piezoelectric activity is related to the doping of Sm₂O₃.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929660","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":"Thermo-elastoplastic behavior prediction of CMCs considering the effects of the temperature and off-axis angle","authors":"Guicheng Zhao,&nbsp;Yiqi Mao,&nbsp;Xuanxin Tian,&nbsp;Jiyuan Li,&nbsp;Shigang Ai","doi":"10.1111/jace.70114","DOIUrl":"10.1111/jace.70114","url":null,"abstract":"<p>Aerospace applications require advanced thermal protection systems to withstand increasingly extreme conditions. Ceramic matrix composites (CMCs) have become crucial materials owing to their outstanding thermostructural performance. Nevertheless, CMCs display intricate mechanical responses under multi-axial thermomechanical loads. Temperature variations combined with off-axis loading from 0° to 90° result in unpredictable strengthening or degradation mechanisms of the material. The experiments performed are not only costly but also technically demanding. In this study, a 3D thermo-elastoplastic constitutive model considering the effects of temperatures and off-axis angles is developed to predict the stress–strain behavior of the ceramic matrix composite. Kinematic hardening and isotropic hardening are considered to describe plastic deformation. The off-axis angle is considered a state variable in the model to characterize the effect on the mechanical behaviors. The material parameters in the model are identified from experiments at different temperatures and off-axis angles. The mechanical behaviors of the C/SiC composite are predicted by the theoretical model without further adjusting the parameters. The comparison of the prediction results with experimental data shows good agreement, indicating that the model can accurately capture the mechanical behaviors of the ceramic matrix composite. By using the proposed constitutive model, the effects of temperature and off-axis angle on mechanical behavior are discussed.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929659","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":"Multifunctionality in BZT–NCZF: Conductivity, dielectric phase transitions, and magnetoferroelectric dynamics","authors":"Somnath Sahu,&nbsp;Shashi Priya Balmuchu,&nbsp;Pamu Dobbidi,&nbsp;Kola Abraham Emmanuel","doi":"10.1111/jace.70117","DOIUrl":"10.1111/jace.70117","url":null,"abstract":"<p>The BaZr_0.1Ti_0.9O₃ (BZT)–Ni_0.5Co_0.2Zn_0.3Fe₂O₄ (NCZF) ceramic composite exhibits multiferroic behavior, making it a promising candidate for next-generation sensors, filters, and tunable microwave devices. It is of fundamental interest to explore its conduction mechanism and tune the composition for enhanced dielectric performance. This work explores the multifunctional properties of BZT–NCZF ceramic composites, emphasizing their conduction, dielectric, ferroelectric, and magnetic behavior. The correlated barrier hopping mechanism governs AC conduction in the composites, wherein Coulomb interactions between defect sites reduce the potential barrier, facilitating carrier transport. Meanwhile, DC transport follows the variable range hopping mechanism, where charge carriers hop between localized polarons. The ferroelectric to paraelectric transition temperature shifts from ∼353 K in pristine BZT to ∼403 K in BZNC15, with BZNC20 showing dual anomalies at ∼343 K and ∼423 K, corresponding to ferroelectric and magnetic transitions. BZNC10 exhibits a high dielectric constant (<i>ε</i>′ ≈ 1150), low loss (tan<i>δ</i> ≈ 0.04 at 1 MHz), and strong relaxor behavior. It also demonstrates optimal energy storage performance, achieving a recoverable energy storage density of 383.8 mJ/cm³; and an efficiency of 92%. Saturation and remnant magnetization improve with increasing NCZF content while coercivity declines. Thermal dependence of magnetic properties follows Bloch's and Kneller's laws. These results highlight the potential of BZT–NCZF composites for multifunctional device applications.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930018","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":"Microstructure and crystallization behavior of SiBCN ceramic powder: High energy ball milling effect on polyborosilazane","authors":"Xiaoliang Sun,&nbsp;Haobo Jiang,&nbsp;Wenhao Dou,&nbsp;Daxin Li,&nbsp;Xingqi Liao,&nbsp;Dechang Jia,&nbsp;Zhihua Yang,&nbsp;Qingqing Chen,&nbsp;Yu Zhou","doi":"10.1111/jace.70125","DOIUrl":"https://doi.org/10.1111/jace.70125","url":null,"abstract":"<p>The SiBCN ceramics have garnered increasing attention as fascinating candidates for high-temperature structural and functional applications, whose diverse properties are associated with the amorphous/crystalline state. SiBCN ceramic powders with high crystallization resistance and fine particle size is desirable for the preparation of the amorphous bulks. In this study, we synthesized a polyborosilazane (PBSZ) precursor through ammonolysis and condensation of tris(dichloromethylsilylethyl)borane and boron trichloride. Subsequently, high-energy ball milling was employed to disintegrate PBSZ and produced SiBCN powders through pyrolysis. Compared with the powders obtained by manual grinding and low-speed ball milling, the effect of high-energy ball milling on the structure of PBSZ and corresponding SiBCN ceramic was investigated. Apart from the regular SiN₂C₂ structure, a new SiN₃C structure is formed during high energy ball milling of PBSZ, and inherited in the ceramic after pyrolysis. The SiBCN powder derived from high-energy ball milled PBSZ exhibits better crystallization resistance and finer particle size, which demonstrates potential for the preparation of amorphous SiBCN bulks.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197061","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":"Theoretical study on the effects of Si doping on the interface adhesion and failure behaviors of SiC/BN interface","authors":"Siyan Zhang,&nbsp;Mei Liu,&nbsp;Yixiu Luo,&nbsp;Luchao Sun,&nbsp;Jiemin Wang,&nbsp;Jingyang Wang","doi":"10.1111/jace.70081","DOIUrl":"10.1111/jace.70081","url":null,"abstract":"<p>Hexagonal boron nitride (<i>h</i>-BN), owing to its extraordinary capability to deflect cracks, a property rooted in its lamellar architecture, emerges as an exemplary interphase material. With the introduction of silicon dopant, its high-temperature resistance at temperatures exceeding 1000°C is significantly bolstered. To elucidate the impact of silicon doping on crack deflection behavior, first-principles calculations are conducted to comparatively analyze interface bonding characteristics and failure behaviors of SiC/BN and SiC/(BN)₄Si interfaces. The findings indicate that silicon doping fortifies interface adhesion and ideal debonding strength while diminishing the failure strength across the interface, thereby reducing the propensity for crack deflection. Nonetheless, there remains considerable potential for enhancing strengthening and toughening effects of silicon-doped <i>h</i>-BN interphase by meticulously adjusting the interface strength. This study provides invaluable insights into the design of silicon-doped <i>h</i>-BN interphases, underscoring the critical importance of balancing a robust interface with a relatively weaker interphase.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929652","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":"Plasma-flash sintering II: Flashing ZnO at room temperature using low AC voltage","authors":"Eva Gil-González,&nbsp;Alejandro F. Manchón-Gordón,&nbsp;Antonio Perejón,&nbsp;Pedro E. Sánchez-Jiménez,&nbsp;Luis A. Pérez-Maqueda","doi":"10.1111/jace.70129","DOIUrl":"10.1111/jace.70129","url":null,"abstract":"<p>In this study, we have advanced the plasma-flash sintering (PFS) technique by demonstrating the preparation of dense ZnO ceramics at room temperature using a moderate electric field of 250 V cm⁻¹ under a low-pressure nitrogen atmosphere. This specific environment facilitates the sequential occurrence of plasma generation followed by the flash sintering event. Compared to traditional flash sintering technique, our approach significantly reduces both energy consumption and processing time, while eliminating the need for a furnace. Impedance spectroscopy confirms that ZnO ceramic produced via this method exhibits enhanced electrical conductivity. Hence, PFS is shown to be a potential tool for tuning the electrical properties of sintered materials at room temperature while boosting energy efficiency.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.70129","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929555","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":"Facile synthesis of monetite and hydroxyapatite from carpet waste-derived calcium carbonate under mild conditions","authors":"Kasidit Janbooranapinij,&nbsp;Oratai Jongrateep,&nbsp;Gasidit Panomsuwan","doi":"10.1111/jace.70126","DOIUrl":"10.1111/jace.70126","url":null,"abstract":"<p>Calcium carbonate (CaCO₃) with a pure calcite phase was successfully recovered from carpet waste via calcination at 600°C in ambient air. Calcium phosphates (CaPs) were subsequently synthesized through a one-step reaction between the recovered CaCO₃ and phosphoric acid (H₃PO₄) at 80°C for 24 h. Molar ratios of calcium to phosphorus (Ca/P) ranging from 1.33 to 2.00 were systematically investigated to determine their influence on the phase evolution of the CaPs. At Ca/P ratios of 1.33 and 1.67, the dominant phases were identified as monetite (CaHPO₄) and hydroxyapatite (Ca₁₀(PO₄)₆(OH)₂), respectively. Further increase of the Ca/P ratio led to the simultaneous presence of multiple phases and unreacted CaCO₃, which was attributed to the excess Ca content. This work presents a simple and environmentally friendly route for synthesizing monetite and hydroxyapatite under mild conditions by tuning the Ca/P ratio. Moreover, the results highlight the potential of carpet waste as an alternative source of CaCO₃ for the synthesis of CaP-based materials.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929554","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":"Precursor-modified strategy to in-situ fabricate lightweight SiC(Zr, rGO) nanocomposite PDCs for aerospace components","authors":"Tao Luo,&nbsp;Jinsheng Ye,&nbsp;Wenyan Huang,&nbsp;Ke Li,&nbsp;Yufan Wu,&nbsp;Yeqi Zhu,&nbsp;Siqi Lan,&nbsp;Shengjian Mao,&nbsp;Zhichao Xue,&nbsp;Rongqian Yao","doi":"10.1111/jace.70120","DOIUrl":"https://doi.org/10.1111/jace.70120","url":null,"abstract":"<p>Aimed at making SiC-based composites for thermal protection components to catch up with the increasing Mach number of hypersonic vehicles, a facile strategy is proposed to fabricate lightweight SiC(Zr, rGO) nanocomposite polymer-derived ceramics (PDCs). The key technique is repyrolyzing SiC(Zr, rGO)_p/polyzirconocarbosilane–vinyltriethoxysilane–graphene oxide (PZCS–VTES–GO, PZVG) blends. Highly cross-linked PZVG can effectively optimize formability of precursors, and in-situ formed Zr-containing phases are beneficial in preventing further grain growth of β-SiC and improving bonding strength within ceramic network. More interestingly, ZrOSi transition zone tightly coupled with nanocrystals helps to increase structure disorder of amorphous ceramic matrix to tough nanocomposite structure. Particularly, SiC(Zr, rGO)₁₃₀₀ nanocomposite PDCs own outstanding hardness (8.10 GPa), superior fracture toughness (3.84 MPa·m^1/2), high ceramic yield (92.60%), and low linear shrinkage (5.00%). Zr-modification enables them to retain favorable overall performances even after 60 min of oxidation under a 1300°C butane torch flame. Timely self-healing ZrO₂(ZrSiO₄)/SiO₂ protective layer can enhance high-temperature oxidation resistance. Meanwhile, ZrO₂ and ZrC have a unique combination of good high-temperature stability/resistance to corrosion, strongly improving structural integrality. As demonstrated, such in-situ construction of nanocomposite system and pyrolytic mechanism open new opportunities for obtaining PDCs with superior high-temperature ablation resistance, toward emerging uses in thermal protection system of hypersonic aerospace vehicles.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 12","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197045","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":"Enhancing the thermodynamic performance of rare-earth tantalate materials by high-entropy design","authors":"Siqian Li,&nbsp;Yiling Huang,&nbsp;Xuemei Song,&nbsp;Fan Peng,&nbsp;Zeyu Chen,&nbsp;Wei Zheng,&nbsp;Yue Sun,&nbsp;Yi Zeng","doi":"10.1111/jace.70115","DOIUrl":"10.1111/jace.70115","url":null,"abstract":"<p>Rare earth tantalates (RE₃TaO₇) demonstrate considerable potential for next-generation thermal barrier coatings (TBCs) owing to their exceptionally high-temperature phase stability and ultralow thermal conductivity. Nevertheless, their practical deployment is constrained by inherent challenges, including a mismatch in the coefficient of thermal expansion (CTE) with substrate materials and relatively low fracture toughness. To overcome these limitations, this study adopts a high-entropy design approach by introducing equimolar six-component doping at the A-site of A₃BO₇-type rare earth tantalates. As a result, three novel high-entropy tantalate materials with single-phase structures and excellent high-temperature stability were successfully synthesized: HE-1((La_1/6Lu_1/6Nd_1/6Sm_1/6Eu_1/6Dy_1/6)₃TaO₇), HE-2((La_1/6Tm_1/6Nd_1/6Sm_1/6Eu_1/6Dy_1/6)₃TaO₇), and HE-3((La_1/6Ce_1/6Nd_1/6Lu_1/6Eu_1/6Dy_1/6)₃TaO₇). The experimental results demonstrate that all three high-entropy materials meet critical performance requirements for TBCs: HE-2 has the lowest lattice thermal conductivity (1.36 W·m⁻¹·K⁻¹ at 1000°C), which is attributed to enhanced phonon scattering effects caused by atomic mass/radius disparities and grain size inhomogeneity induced by high-entropy doping. HE-3 exhibits the highest coefficient of CTE, reaching 10.5 × 10⁻⁶ K⁻¹ at 1200°C. This enhancement is attributed to increased lattice disorder, arising from pronounced distortions of [TaO₆] polyhedra within short-range ordered domains, which amplify atomic anharmonic vibrations and net atomic displacements. Mechanical testing indicates that all high-entropy compositions display overall mechanical properties that surpass those of conventional single-component rare-earth tantalates. In summary, this study effectively optimizes the thermophysical and mechanical performance of rare-earth tantalates through a high-entropy design approach, offering valuable experimental insights and novel strategies for the development of next-generation TBC materials.</p>","PeriodicalId":200,"journal":{"name":"Journal of the American Ceramic Society","volume":"108 11","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144929941","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}