GLASS PHYSICS AND CHEMISTRY
·
2025
·Vol. 50
·期 5
·511-520
·
IF 0.6
Sihao Jian,Xia Chenkang,Hao Mingyuan,Liu Weihai,Ma Chao,Miao Yang
Silica aerogel has rec eived more and more attention in the field of thermal insulation. However, the poor mechanical properties and high temperature instability of pure silica aerogels seriously restrict the development and application of silica aerogels. Fiber reinforcement is an effective way to improve the mechanical properties of silica aerogels. In this paper, Al 2 O 3 –SiO 2 aerogel was compounded with mullite fiber to prepare silicon–aluminum aerogel fiber felt. When the strain value reaches 30%, the compressive strength of the fiber felt with aerogel content of 50.1 wt % reaches 0.21 MPa, and the thermal conductivity of fiber felt decreases from 0.0425 to 0.0322 W/m K when the aerogel content increases to 50.1 wt %. The thermal insulation performance test of fiber felt also showed that the addition of aerogel could significantly improve the heat insulation of fiber felt, and the cold surface temperature of fiber felt was only about 33°C when the flame exceeding 1000°C calcined the fiber felt for 10 s. This work provides a simple solution to prepare aerogel/nanofiber felt with good mechanical properties and low thermal insulation. Highlights: silicon–aluminum composite aerogel felt (AS/ASNFAs) has been prepared by sol-gel and impregnation method, AS/ASNFAs has good mechanical properties (the compressive strength reaches 0.21 MPa) and thermal insulation (0.0322 W/m K), AS/ASNFAs has good flame retardancy, and it remains stable after being burned at 1000 degrees butane for 10 min.
研究领域:
材料科学
·
纳米技术
·
热工学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Zhu-yu Li,Sheng Li,Le-ran Li,Qi Niu,Kai Li,Bin Hu,Qiang Lu
Thermochemical energy storage can overcome the drawbacks such as instantaneity, instability, and the incongruity between supply- and demand-side in the utilization of renewable energy. CaCO 3 /CaO is regarded as a promising material for thermochemical energy storage, whereas its stability still requires urgent improvement. In this paper, a new Al 2 O 3 and SiO 2 co-doped calcium-based material derived from eggshell (ES) was prepared for efficient heat storage. The physicochemical properties of synthesized materials were systematically analyzed. The regulation mechanisms of Al 2 O 3 and SiO 2 additions on the cyclic characteristics of heat storage materials were investigated by a thermogravimetric analyzer. The results displayed that ESCa-2.5Si2.5Al, prepared with a mass ratio of ES: Al 2 O 3 : SiO 2 = 95: 2.5: 2.5, demonstrated outstanding specific surface area of 14.64 m 2 /g and pore volume of 0.080 cm 3 /g, which were 2.74 and 5 times greater than those of ES-based CaO (ESCa), respectively. Meanwhile, SiO 2 and Al 2 O 3 could react with CaO to form Ca 3 Al 2 O 6 and Ca 2 SiO 4 , their synergistic effect could efficiently improve the sintering resistance of CaO. Therefore, ESCa-2.5Si2.5Al possessed excellent cyclic stability. Its initial energy storage density was 2273.19 kJ/kg, and the retention ratio reached 72.93 % after 20 cycles, significantly higher than that of ESCa (19.35 %). In addition, compared with ESCa, the heat storage temperature of ESCa-2.5Si2.5Al decreased from 792 °C to 778 °C, and its carbonation rate only slightly attenuated over 20 cycles, enabling rapid heat storage at lower temperatures and stable heat release.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Meng Zhang,Daliang Xu,Yanrui Wang,Jiaxuan Yang,Xiaobin Ma,Junwen Ding,Peijie Li,Langming Bai,Heng Liang
Ceramic membrane technology is effective for oil emulsion separation, while its low permeance and fouling issue yield high energy consumption in practical applications. Herein, a series of ceramic membranes were fabricated by incorporating the SiO 2 sintering aid into Al 2 O 3 ceramic powder using a compression molding method. Due to the melting and recrystallizing of SiO 2 on the surface of coarse grains, the modified ceramic membrane exhibited the underwater superoleophobicity property. After optimizing the fabrication conditions, including sintering temperature, molar ratio of Al 2 O 3 /SiO 2 and molding pressure, the modified ceramic membrane had a pure water permeance of 1319 L·m −2 ·h −1 ·bar −1 and a petroleum ether rejection rate of 97.1 %. In addition, the increase in the square quartz phase narrowed the pore size and improved the hydrophilicity of the ceramic membrane, thereby alleviating the pore blocking and enhancing the flux recovery. The flux recovery rate was about 86.1 % after the sodium hydroxide backwashing. This study presents a rational strategy for developing ceramic membranes with scalable potential for efficient oil emulsion separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Ao-Qi Wang,Jun-Cheng Jiang,Lei Ni,Jie Wu,Fang-Chao Cao
Abuse situations such as overheating, overcharging, mechanical damage, and short circuits can lead to thermal runaway of lithium-ion batteries (LIBs). Thermal runaway propagation (TRP) in LIB modules remains a critical safety bottleneck for electric vehicles. Conventional insulation materials often fail to balance high-temperature stability, processability, and cost-effectiveness. Pure SiO₂ aerogels suffer from brittleness and sintering collapse above 600 °C, while high-performance aerogels typically rely on expensive supercritical drying. In this study, using aluminum chloride hexahydrate (AlCl 3 ·6H 2 O) and tetraethyl orthosilicate (TEOS) as raw materials (Al: Si molar ratio = 3:1), we prepared low-density, high-specific-surface-area, and thermally stable monolithic Al₂O₃- SiO₂ composite aerogels (ASA) under ambient pressure drying by optimizing the amount of propylene oxide (PO) gelling aid to 60 ml. This optimization overcomes the long-standing challenge of poor monolithic integrity in atmospheric-pressure dried aerogels while reducing production costs. Another novelty lies in the formation of stable Al-O-Si bonds in ASA, which endow the material with exceptional high-temperature resistance: the ASA maintained a high specific surface area (92.8259 m 2 /g) even after calcination at 1000 °C, far outperforming pure SiO₂ aerogels By introducing aramid fiber felt (AF) and pre-oxidized fiber felt (PF) as mechanical reinforcements, the thermal stability of the composite materials was further enhanced, forming a “nano-micro” interpenetrating structure that synergistically improves mechanical robustness and insulation performance. The thermal conductivity of ASA at 25 °C was 0.0222 W/m·K, while the PF-ASA exhibited a thermal conductivity of 0.0672 W/m·K at 500 °C and retained structural integrity after being exposed to 1200 °C, maintaining effective insulation performance. Additionally, in the thermal insulation application of battery modules, the pre-oxidized fiber insulation group demonstrates the ability to prevent heat spread, with released CO 2 and consumed O 2 reduced by 38.6% and 33.8% respectively, thereby lowering the risk of thermal runaway. The production of advanced thermal insulation materials represents a preferred solution for thermal safety protection in power batteries.
✓ 已验证
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2021
·
IF 3.531
Leibo Deng,Zhe Fu,Zhang Mingxing,Hao Li,Bin Yao,Jianli He,Hua Chen,Yonghong Ma
TiO 2 –ZrO 2 -codoped MgO–B 2 O 3 –Al 2 O 3 –SiO 2 glass-ceramics were prepared using the traditional melting method. The effects of replacing TiO 2 with ZrO 2 on the glass stability (GS), crystallization behavior, structures, and properties of the obtained samples were studied. Results showed that the addition of ZrO 2 increased the GS, which decreased the crystallization ability of the samples. When the heat treatment temperature was increased from 900 °C to 1000 °C, the mullite and quartz phases first precipitated in the glass matrix, and then converted into cordierite. Because of the low solubility of TiO 2 and ZrO 2 in this glass system, the rutile and zircon phases will precipitate from the parent glasses. Owing to changes in the composition and structure of the samples, the density and Vickers hardness increased, while the coefficient of thermal expansion of the samples first decreased and then increased when TiO 2 was replaced with ZrO 2 .
研究领域:
材料科学
·
无机非金属材料
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiefu Lang,Ke Ren,Yiguang Wang
As a thermal barrier coating (TBC) material, 8 wt% yttria-stabilized zirconia (8YSZ) exhibits poor resistance against calcium–magnesium–aluminosilicate (CMAS) corrosion. This is caused by the penetration of molten CMAS glass and the depletion of Y 3+ , which limits the lifetime of 8YSZ. In this study, a multi-rare-earth-oxide-doped zirconia (15 wt% (Lu 0.2 Yb 0.2 Dy 0.2 Gd 0.2 Y 0.2 )–ZrO 2 , denoted as 15LYDGY–SZ) ceramic was prepared to examine its interaction with CMAS. The sluggish diffusion effect and the competition between various dopant elements toward reaction with CMAS effectively slow down the atomic diffusion and limit the transformation of tetragonal phase into monoclinic phase in 15LYDGY–SZ ceramic. Compared with the currently used 8YSZ ceramic, the corrosion resistance of 15LYDGY–SZ to CMAS and its retention rate of fracture toughness after CMAS corrosion are improved. The results show that the multi-rare-earth-oxide-doped zirconia ceramic prepared in this study is a promising candidate material for the development of future TBCs.
研究领域:
材料科学
·
航空工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Chi Yan,Jialin Li,Yuhao Dai,ZhiJiang Lan,Haobo Wang,Hua Tong,Xiaojun Ye,Xiao Yuan,Cui Liu,Hongbo Li
Polyimide (PI), commonly used in space applications, is vulnerable to atomic oxygen (AO) erosion in low Earth orbit, causing performance degradation. Atomic layer deposition (ALD) of ultrathin films has great potential as AO protective coatings for aerospace materials. In this study, nanometer-thick plasma-enhanced atomic layer deposition (PEALD) SiO 2 films were deposited on in-situ oxygen plasma-activated PI surfaces. The nucleation and growth process of SiO 2 was systematically analyzed. A uniform and dense SiO 2 film was formed, providing limited resistance to AO erosion, but not sufficient for extreme environmental conditions. To further enhance AO resistance, we introduced thermal ALD-Al 2 O 3 interlayers within the same processing window and alternately deposited conformal, continuous Al 2 O 3 /SiO 2 nanolaminates on the PI surface. The Al 2 O 3 interlayer effectively reduced the film deposition roughness, forming a smoother, denser barrier layer and minimizing growth defects. This dense ALD-Al 2 O 3 /SiO 2 nanolaminate, with its inert Si-O-Al bonds, effectively prevents AO from penetrating the substrate, showing superior protection under long-term AO exposure. After AO irradiation, the surface remained smooth with no obvious defects or voids, effectively avoiding undercutting caused by AO. The synergistic effect of alumina and silica provides excellent AO protection while maintaining good optical transmittance.
研究领域:
材料科学
·
航天工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF THERMOPHYSICS
·
2025
·Vol. 47
·期 1
·7
·
IF 2.9
Zhang Qiang,Han Yongliang,Ren Jiayao,Wu Fangli,Zhang Rixin,Yang Yuxin,Bi Shengshan
The dispersion stability and thermophysical properties of ternary composite nanofluids (NF) containing graphene oxide (GO), aluminum oxide (Al 2 O 3 ), and silica (SiO 2 ) at different concentrations and ratios, with water-based ethylene glycol and 1,2-butanediol added as antifreeze agents, were investigated. First, the ternary nanofluid was prepared using a two-step method, and the prepared nanoparticles were characterized using field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The influence of surfactant addition on the stability of the nanofluid was analyzed. The density and thermal conductivity (TC) of NF were measured at different volume concentrations (0.2–0.6 vol%) and temperature ranges (298.15–333.15 K and 293.15–363.15 K, respectively). As the GO concentration increased, the proportion of thermal conductivity improvement showed a stepwise increase with concentration changes. When the GO concentration reached 80 % in the three types of nanoparticles, the thermal conductivity of NF at 363.15 K was 58 % higher than that of the base fluid. For the two different base fluids, under the same ratio, concentration, and temperature conditions, the base fluid containing 1,2-butanediol showed a more significant effect in enhancing thermal conductivity.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 11
·1934
·
IF 5.1
Yuxin Ma,Mengjiao Zhang,Wenqiang Wang,Hanwen Zhang,Wenzhe Li,Xiangxiang Gu,Qiuxia Fu,Haoru Shan
Ceramic nanofiber-based materials have wide applicability in high-temperature management and protection. The transformation of conventional two-dimensional ceramic nanofibrous membranes into three-dimensional nanofiber-based bulks can effectively improve their thermal insulation performance and expand their range of applications. Herein, lamellar-structured Al2O3-SiO2nanofibrous aerogels (LASO NFAs) with varying inorganic binder contents were prepared via a sequence of processes involving face-to-face stacking, impregnation, and calcination, using flexible Al2O3-SiO2nanofibrous membranes (ASO NFMs) as building units and aluminum dihydrogen phosphate as an inorganic binder. Varying the inorganic binder content in the aerogel matrix enables effective control over the compressive properties and interlayer spacing of the resulting aerogels. Specifically, the optimized LASO-20 NFAs demonstrated relatively good compression resilience, with a plastic deformation of 22.1% after undergoing 500 compressive cycles at a compressive strain of 50%. Moreover, profiting from the high-temperature resistance of ASO NFMs and substantial air content present within nanofiber interlayers, the LASO-20 NFAs with a thickness of 20 mm could effectively insulate against surface temperatures of 1000 °C down to 224 °C. Moreover, LASO-20 NFAs exhibited a room-temperature thermal conductivity of approximately 0.043 W·m−1·K−1, illustrating a favorable high-temperature thermal insulation characteristic. Furthermore, the LASO-20 NFAs presented promising service performance in extreme environments, providing a novel perspective in the development of new types of ceramic aerogels.
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2014
·Vol. 40
·期 9
·14105-14110
·
IF 2.086
Hongyu Liu,Jun Xu,Baohua Guo,Xiangming He
In order to improve the safety of lithium-ion batteries, Al 2 O 3 /SiO 2 composite ceramic layers were introduced on both sides of polypropylene (PP) separator surface. SiO 2 is used to form porous network, and Al 2 O 3 is evenly distributed in it. The introduction of Al 2 O 3 /SiO 2 composite ceramic layers can not only restrict the motion of separator but also resist the protrusion of the separator, so the composite separator has lower thermal shrinkage and higher mechanical properties. As the composite layers can retain additional liquid electrolyte, the composite separator has higher electrolyte uptake and ionic conductivity . Cell performance, such as C-rate capability and cycle performance, were also investigated and compared to those obtained with pristine separator and only SiO 2 coated separator.
研究领域:
材料科学
·
储能
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 20
·3688
·
IF 5.719
Hashim,Muhammad Hafeez,Nidhal Ben Khedher,Sayed Mohamed Tag-EIDin,Mowffaq Oreijah
In recent years, energy consumption has become an essential aspect in the manufacturing industry, and low heat transfer is one of the obstacles that affect the quality of the final product. This situation can be managed by suspending nanoparticles into ordinary heat transferring fluid (the base fluid). This newly prepared colloidal suspension has better heat transport capabilities. Keeping such usage of nanofluids in mind, this research was performed to better understand the heat transport characteristics during flow analysis saturated in porous media subject to Al2O3-SiO2/water hybrid nanofluids. This flow problem was generated by a stretching/shrinking surface. The surface of the sheet was under the influence of mass suction and second-order partial slip. The boundary layer flow was formulated in a system of partial differential equations by utilizing basic conservation laws in conjunction with the Tiwari and Das nanofluid model. Then, the appropriate form of the similarity transformation was adapted to transform the model into a system of ordinary differential equations. The built-in function, i.e., the bvp4c function in the MATLAB software, solved the reduced form of the boundary layer model. The novelty of this study lay in the predicting of two different exact and numerical solutions for both the flow and temperature fields. The computed results showed that the medium porosity as well as the nanoparticle volume fraction widened the existence range of the dual solutions. In addition, the investigational output exposed the fact that the temperature fields were significantly enhanced by the higher nanoparticle volume fraction. Moreover, the outcomes of this study showed a superb correlation with existing works. The present results can be utilized in various branches of science and engineering such as the polymer industry and in the treatment of different diseases.Keywords:hybrid nanofluid;stretching/shrinking sheet;dual solutions;semi-analytical solution;porous medium
研究领域:
工程热物理
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2018
·
IF 4.908
Hao Zhou,MengYao Ge,Shiguo Wu,Bichao Ye,Yaxin Su
The selective catalytic reduction of NO with propane has been investigated with iron based monolithic catalysts supported on alumina, silica, and titania. The catalysts were characterized by N 2 -physisorption, XRD, SEM, XPS, H 2 -TPR, Py-FTIR and in situ DRIFTS technologies. The different supports had a significant influence on specific surface area, surface morphology, lattice oxygen, redox properties and the acid sites, which resulted in differences in the catalytic activity of NO reduction. The C 3 H 8 -SCR performance decreased in the order as Fe/Al 2 O 3 /CM > Fe/SiO 2 /CM > Fe/TiO 2 /CM. Fe/Al 2 O 3 /CM showed the highest activity with a nitrogen oxide conversion of 100% in the presence of oxygen at 500 °C,which is mainly attributed to the good redox properties and the abundant Lewis acid sites. Based on in situ DRIFT studies, the increase of Lewis acid sites will enhance the formation of NO 2 /NO 3 − species and acetate/formate species, then promote the catalytic activity.
研究领域:
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）