CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Liangbo Sun,Tipeng Shan,Jie Zhang,Yongheng Lu,Chunfeng Liu,Shuohao Wang
Glass-ceramic is commonly considered to be an excellent bonding filler for SiC ceramic joints. However, the mismatch in the coefficient of thermal expansion (CTE) between the filler and SiC may induce microcracks in the joint, leading to a subsequent deterioration in mechanical performance. To address this issue, this study introduces silicon carbide ceramic particles into CaO-Al 2 O 3 glass-ceramic (SiC p /CA composite filler) to mitigate the adverse effects on the joint microstructure and mechanical properties caused by the mismatch of CTE. The feasibility of the SiC p /CA combination was preliminarily explored through wetting experiments. The thermal expansion measurement on the SiC p /CA composite filler indicate that adding SiC p to the CA glass-ceramic can closely match its CTE with that of the SiC substrate, thereby minimizing the residual stress in the joint. When SiC p /CA composite filler is used to join SiC ceramics, the results demonstrate a uniform microstructure in the joint, with a well-bonded interface. The joint structure is consist by Ca 12 Al 14 O 33 and SiC p . When using 20 wt% SiC p /CA composite filler to join SiC ceramic, the shear strength of the joint is 50 MPa, marking a substantial 100 % increase compared to the joints using CA glass-ceramic under identical conditions. This highlights the effectiveness of incorporating SiC p into CA glass-ceramic in significantly enhancing the mechanical properties of SiC joints.
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Industrial Chemistry & Materials
·
2025
·
IF 11.9
Bocheng Yu,Muqing Yang,Yijian Qiao,Yaozu Wang,Yongqing Xu,Xuan Bie,Qinghai Li,Yanguo Zhang,Shuzhuang Sun,Hui Zhou
Integrated carbon capture and utilization (ICCU) has emerged as a promising strategy toward carbon neutrality. However, most existing studies rely on simulated flue gas compositions, neglecting the impact of common impurities such as sulfur oxides (SOx) and nitrogen oxides (NOx), thereby limiting the practical industrial applicability of ICCU technologies. Herein, we systematically investigate the effects of SO2 and NO2 at various concentrations on the adsorption-catalysis performance based on a representative Ni-Ca dual functional material (DFM) in ICCU-dry reforming of methane (ICCU-DRM) process. Exposure to 100 ppm SO2 showed negligible influence on catalytic activity but markedly inhibited carbon deposition. Further increasing the SO2 concentration to 500 ppm led to complete deactivation of the DFM. NO2 exhibited a similar concentration-dependent trend to SO2, albeit with a comparatively lower impact. Mechanistic analysis revealed that both SO2 and NO2 promote the formation of a coating layer of calcium-containing compounds on the surface of Ni nanoparticles, accounting for the part or total deactivation. These findings offer critical insights into the industrial applications of ICCU systems under realistic flue gas conditions.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Zongmin Hu,Chen Sun,Yimin Xuan
Thermoelectric technologies (TEs) offer immense potential for waste heat recovery and energy storage. However, the practical application of current TEs has been severely hampered by potential performance degradation in extreme environments, particularly at high temperatures, due to electrolyte flammability or poor carrier mobility. The development of high-temperature, high-performance TEs is crucial for broadening their operational range and enabling diverse applications. Here, practical high-temperature high-voltage thermal charging cells (HHTCCs) are reported, facilitated by a heat-resistant trifluoromethanesulfonate-based Ca–Li dual-cationic ionic liquid electrolyte containing functionalized AmimCl solvent, together with a thermotolerant composite membrane, PEN(polyphenylene-ether-nitrile)@ZrBDC-F-4%. The dual-cation mechanism enables high thermal voltage through cooperative energy storage, while the functionalized AmimCl accelerates the mobility of Ca 2+ and Li + ions by weakening the surrounding shielding effect. Additionally, the anionophilic ZrBDC-F-4% nanoparticles in the composite membrane enhance carrier migration. As a result, the HHTCCs exhibit an impressive thermal voltage of 1.138 V, a remarkable thermopower of 15.3 mV K −1 , and an outstanding Carnot-relative efficiency of 9.56% over an unprecedented temperature range from 328.15 to 393.15 K, demonstrating the excellent safety and feasibility of HHTCCs. This work expands the service-temperature range of i-TEs, holding significant promise for high-temperature, high-performance waste heat harvesting.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yi Shi,Jian Sun,Renhai Wang,Yun Long,Ruilin Wang,Zijian Zhou,Shengan Wu,Xiangkun Elvis Cao,Chuanwen Zhao
The light-absorbing shell-wrapped Ca-based TCES (thermochemical energy storage) pellets are well-suited for volumetric receivers employed in solar-driven CaL (Calcium-Looping) systems. However, shell shedding coupled with the low intrinsic thermal conductivity of the internal core restricts these Ca-based TCES pellets' practicality. In this work, high-temperature Fe-welding is employed to consolidate the light-absorbing shell, while SiC is doped into the interior core to enhance its thermal conductivity. The generation of CaFe 2 O 4 (a readily sinterable phase) from the bimetallic Fe/Mn light-absorbing shell is observed, with this phase serving as a key mediator that reinforces the core-shell interface and thereby suppresses shell shedding efficiently. Doping 4 wt% SiC into the Ca-based interior core facilitates its rapid heating to 1255.8 K in 30 s under concentrated radiation. In contrast, undoped, shell-free pellets only achieve 723.8 K after 70 s, a temperature inadequate for initiating CaCO 3 decomposition under identical flux conditions. Therefore, the innovative design of the Fe/Mn bimetallic shell integrated with a 4 wt% SiC-doped Ca-based core produces a durable TCES pellet. This pellet retains a thermal storage density of 1.03 MJ kg −1 after 29 cycles and achieves an average solar absorptance of 85.29%, thereby qualifying it as a promising candidate for solar-driven CaL systems.
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OPTICS EXPRESS
·
2025
·Vol. 33
·期 3
·4940-4956
·
IF 3.3
Changran Zheng,Baotong Guo,Tianhe Lu,Xi Zhu,Xi Zhu,Bingxuan Xia,Bobo Yang,Zhoudong Yang,Sergey Lishik,Anton Chernyakov,Jingkang Xiong,Jiajie Fan
(Sr, Ca)AlSiN3:Eu2+ (SCASN) phosphors are widely applied in white LEDs to enhance the red spectral component, thereby improving spectral coverage and potentially contributing to a higher color rendering index. However, the rapid degradation of SCASN phosphors under highly thermal and thermal-humidity conditions restricts broader application. In this study, silica-coated SCASN phosphors were prepared via rapid plasma-assisted film deposition. The 54 nm silica coating significantly altered the wettability, optical properties, and stability of the phosphors. After the silica surface coating, the water contact angle increased from 20° to 125.5°, indicating enhanced hydrophobicity. Further photoluminescence (PL) test results demonstrated an improvement in intensity for the coated phosphor compared to the uncoated phosphor. Moreover, after aging at 100°C and 100% relative humidity for 336 hours, the PL intensity of the uncoated phosphor decreased to 65% of its original value, while the coated phosphor maintained 88.5%. This excellent stability is attributed to the protective silica coating, which acts as a barrier against moisture penetration and prevents the hydrolysis of the phosphor surface. First-principles density functional theory calculations further demonstrated that unsaturated O-Si groups formed during HDMSO decomposition create a silica coating, reducing the surface H2O adsorption energy from -2.544 eV to -0.062 eV. The plasma-assisted deposition method effectively enhances phosphor stability, promoting the development of durable and high-performance LED phosphors.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Chengke Tan,Junhang Tian,Jihuan Xie,Yingnan Liu,Qi Liu,Weidong Zhuang
Luminescent properties of phosphors can be modified and improved by constructing energy transfer. In this article, a series of Ce3+- and/or Eu2+-doped Ca-α-sialon phosphors were synthesized through the traditional solid-state reaction method. The construction of an efficient energy transfer enables the modulation of a wide range of light colors, thereby facilitating a gradual color change from blue-green (0.1844, 0.2535) to yellow (0.4282, 0.5051). Moreover, the codoping of Ce3+ enhances the luminescence intensity of Eu2+ by approximately 2.2 times. Within the experimental gradient, the energy-transfer efficiency can reach up to 58.7%, and the energy-transfer mechanism is a quadrupole–quadrupole interaction. Gaussian fitting of the emission spectrum of the codoped samples reveals that the intensities of the Eu2+ and Ce3+ emission peaks of the codoped samples at 423 K are 78 and 87% of those at room temperature, respectively. Moreover, the thermal stability of the characteristic peaks of Ce3+ in the codoped samples is significantly enhanced compared to those doped alone. These excellent properties highlight the potential application of CaSi9Al3ON15/Ce3+, Eu2+ phosphor in white light WLEDs.
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MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Zhiwei Li,Zhengxiang Bian,Yurong Ren,Zhihui Chen,Jiujun Xu
(1-x)(0.9Ba 1.003 Ti 0.97 Ca 0.03 O 3 –0.1(Bi 0.51 Na 0.47 ) 0.94 Ba 0.06 TiO 3 )-xNa(Nb 0.85 Ta 0.15 )O 3 ( x = 0.03–0.15) ceramics were designed and fabricated through a bidirectional optimization strategy using traditional solid reaction method. The results revealed that the introduction of Na(Nb 0.85 Ta 0.15 )O 3 increased the vacancy concentration at the A site , conducing to improved polarization and reduced grain size. The substitution at the B site disrupted the long-range ordered ferroelectric domains and generated polar nanodomains, leading to enhanced relaxation behavior. The optimum energy storage density of 3.57 J/cm 3 and efficiency of 87.5% were simultaneously achieved under the electric field of 220 kV/cm in the sample with x = 0.09. Moreover, it also exhibits extremely high-power density (∼57 MW/cm 3 ), ultrafast discharge time (∼103 ns), high discharge density (1.35 J/cm 3 ), along with excellent temperature (30‒120 °C) and frequency stability (1‒100 Hz) under the equivalent electric field of 120 kV/cm. This novel design strategy provides theoretical guidance for the development of advanced electrical energy storage devices.
研究领域:
材料科学
·
能源存储
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Nanomaterials
·
2022
·Vol. 12
·期 16
·2755
·
IF 5.719
Yue Xu,Huan Liao,Jing Zhang,Haijun Lu,Xinghua He,Yi Zhang,Zhenbin Wu,Hongyu Wang,Minghua Lu
Recovery phosphorus (P) from P-contaminated wastewater is an efficient and environmentally friendly mean to prevent water pollution and alleviate the P shortage crisis. In this study, oyster shell as calcium sources and peanut shells as carbon sources (mass ratio 1:1) were used to prepare a novel Ca-modified biochar (OBC) via co-pyrolysis, and its potential application after P adsorption as a P biofertilizer for soil was also investigated. The results shown that OBC had a remarkable P adsorption capacity from wastewater in a wide range of pH 4–12. The maximum P adsorption capacity of OBC was about 168.2 mg/g with adsorbent dosage 1 g/L, which was about 27.6 times that of the unmodified biochar. The adsorption isotherm and kinetic data were better described by Langmuir isotherm model (R2> 0.986) and the pseudo second-order model (R2> 0.975), respectively. Characterization analysis of OBC before and after P adsorption by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and specific surface area and porosity analyzer (BET) indicated that the remarkable P adsorption capacity of OBC was mainly ascribed to chemical precipitation, electrostatic adsorption, and hydrogen bonding. Pot experiment results showed that OBC after P adsorption could significantly promote the germination and growth ofSpinacia, which manifested that OBC after P adsorption exhibited a good ability to be reused as P fertilizer for soil.Keywords:phosphorous;oyster shell;peanut shell;biochar;P biofertilizer
研究领域:
环境科学
·
农业科学
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BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Mengjiao Fan,Maowen Qi,Yuxu Liu,Hongqin Ren,Yuchen Jiang,Baihong Li,Wenjian Liu,Shu Zhang,Yi Wang,Xun Hu
Convert K 2 CO 3 in filtrate in KOH by adding Ca(OH) 2 to simultaneously obtain CaCO 3 . • Superior cracking efficiency of KOH promotes the formation of micropores. • CaO as hard template facilitates generation of meso - and macropores, • Adding Ca(OH) 2 retains hollow honeycomblike structure in activated carbon (AC). • High mesoporosity and graphitic structure in AC determines tetracycline adsorption. Activation with K 2 C 2 O 4 generates K 2 CO 3 that could be recycled for second-round activation. However, activation with either K 2 C 2 O 4 or K 2 CO 3 produces activated carbon (AC) with mainly micropores. Herein, recycled K 2 CO 3 reacted with Ca(OH) 2 to generate KOH, CaO and CO 2 for activation of poplar, cellulose and lignin. The results indicated that K 2 CO 3 + Ca(OH) 2 showed superior cracking capability, generating AC from poplar with higher S BET (1822.1 versus 1179.4 m 2 /g with K 2 CO 3 or 1255.6 m 2 /g with K 2 C 2 O 4 ) and higher meso -porosity (43.3 % versus 10.0 % with recycled K 2 CO 3 and 3.1 % with K 2 C 2 O 4 ). This was due to strengthened activity for cracking with KOH and CaO, CO 2 for gasification, and CaO as a hard template. The in-situ DRIFTS characterization showed that K 2 CO 3 + Ca(OH) 2 interrupted dehydration of –OH, dehydrogenation of −C–H and even aromatization via cracking. The AC activated with Ca(OH) 2 /K 2 CO 3 showed the highest capability for tetracycline adsorption via monolayer mode, and membrane diffusion was the key rate-determining step. Download: Download high-res image (232KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Ningfei Huang,Wei Zhang,Yang Ye,Tao Liu,Wei Xie,Qiuzhi Liang,Jie Lin,Zuyong Feng,Guangting Xiong
Based on the SrLaLiWO 6 matrix, the study satisfactorily synthesized a red phosphor doped with Eu 3+ . Regulation of Ca 2+ doping to control the red-to-blue emission ratio of the phosphor. Analysis of the content and structure of the samples verified the production of high-purity (Sr,Ca)LaLiWO 6 : Eu 3+ phosphor. When blue light at 464 nm excites the phosphor, it emits intense red light. The emission intensity of Eu 3+ ions rose when Ca 2+ was incorporated to the SrLaLiWO 6 matrix. In the meantime, the Sr 0.96 Ca 0.04 La 0.7 LiWO 6 : 0.3Eu 3+ phosphor shows comparatively high quantum efficiency and thermal stability. When the blue light-emitting chip is coupled with the Sr 0.96 Ca 0.04 La 0.7 LiWO 6 : 0.3Eu 3+ phosphor, the emission spectrum produced matches the absorption spectra of plant pigments. Consequently, the prepared sample is an excellent red-emitting phosphor with potential application value.
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TOXICOLOGY
·
2026
·
IF 5.2
Haitao Yang,Liqing Wu,Shuyan Niu,Menghao Guo,Chenyu Liu,Tianshu Wu,Mengjing Cui,Yuying Xue
The widespread use of plastic products has elevated nanoplastics (NPs) pollution to a critical global concern, with polystyrene nanoplastics (PS-NPs) and cadmium (Cd) emerging as common environmental contaminants whose co-occurrence and combined toxicity increasingly alarm the scientific community. The intestine, as the main xenobiotic exposure site, is a primary target for PS-NPs and Cd exposure-individually or combined. While PS-NPs and Cd’s individual intestinal toxicity mechanisms are well-studied, their combined effects remain poorly understood, especially at the molecular level. This study investigated the combined effects of environmentally relevant concentrations of PS-NPs and Cd on intestinal apoptosis and the regulatory role involving the IP3R/Ca 2+ /STAT3 pathway using both C. elegans and Caco-2 cell models. In C. elegans , 72-hour PS-NPs (10 μg/L) and Cd (5 μg/L) co-exposure induced developmental retardation, intestinal structural abnormalities, and dysregulated expression of apoptosis-related genes along with key components of the IP3R/Ca 2+ /STAT3 pathway. Parallel experiments in Caco-2 cells demonstrated that 24-hour co-treatment with PS-NPs (20 μg/mL) and Cd (0.25 μg/mL) significantly elevated apoptosis rates and triggered endoplasmic reticulum stress. Molecular analyses revealed these effects were mediated through increased IP3R phosphorylation, elevated cytosolic Ca 2+ concentrations, and enhanced phosphorylation of the downstream effector STAT3. Notably, pharmacological inhibition of IP3R (2-APB, 10 μM), Ca²⁺ chelation (BAPTA, 10 μM), or STAT3 phosphorylation (stattic, 5 μM) significantly attenuated PS-NPs and Cd-induced apoptosis. These results establish the IP3R/Ca²⁺/STAT3 axis as a pivotal regulatory switch governing intestinal apoptosis under NP-heavy metal co-exposure, providing mechanistic foundations for environmental risk assessment of combined pollutant exposure.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yaowu Wei,Xiujuan Wang,Yuan Chen,Wenguo Zhang,Junfeng Chen
The effect of Ca(OH) 2 and Zr(OH) 4 on the sintering behavior and thermal shock resistance of Y 2 O 3 ceramics were investigated in this study. The results showed that Ca(OH) 2 enhanced the densification of Y 2 O 3 ceramics. CaO generated from the decomposition of Ca(OH) 2 reacted with Y 2 O 3 to form a solid solution. The substitution of Ca 2 + for Y 3+ created V O ∙ ∙ that facilitated substance migration and pore elimination. Conversely, the introduction of Zr(OH) 4 exerted an adverse effect on the sintering. ZrO 2 produced by the decomposition of Zr(OH) 4 formed a solid solution with Y 2 O 3 which inhibited the sintering of Y 2 O 3 ceramics, where Zr 4+ primarily enhanced lattice stability rather than promoting sintering. The O i ′ ′ created by the substitution of Zr 4+ for Y 3+ reduced cation diffusion and hindered grain boundary migration. The mechanisms by which two types of additives affect the thermal shock stability of Y 2 O 3 ceramics are different. The Zr(OH) 4 -doped ceramics demonstrated better thermal shock resistance owing to their higher porosity, which changed energy release pathway and increased the resistance to crack propagation. In comparison, the improvement in the Ca(OH) 2 -doped ceramics mainly originated from the enhanced mechanical properties, which would suppressed crack initiation and delayed failure under thermal stress.
研究领域:
材料科学
·
陶瓷
·
热学性能
·
烧结技术
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