JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2020
·
IF 6.155
Lin Chen,Mingyu Hu,Jun Guo,Xiaoyu Chong,Jing Feng
As candidate thermal/environmental barrier coatings (T/EBCs), the structure characteristics and comprehensive properties of monoclinic-prime (m') RETaO 4 (RE = Yb, Lu, Sc) with excellent Al 2 O 3 /SiO 2 chemical compatibility are studied. Excellent thermal insulation protection will be provided by m'RETaO 4 due to their low thermal conductivity (∼1.6 W m −1 K −1 , 900 °C) and prominent thermal radiation resistance, which is much better than those of YSZ (∼2.5 W m −1 K −1 , 1000 °C) and La 2 Zr 2 O 7 (∼2.0 W m −1 K −1 , 900 °C). The thermal expansion coefficients (TECs) are 3.0–8.0 × 10 -6 K −1 (200−1200 °C), which is suitable for T/EBCs applications. Furthermore, absence of phase transition and extraordinary chemical compatibility with Al 2 O 3 /SiO 2 up to 1500 °C indicate the potential application prospect. The documented governing mechanisms of m'RETaO 4 properties will enable researchers to promote their application in the future investigation.
研究领域:
材料科学
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工程热物理
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Heng Chen
Ytterbium aluminum garnet (Yb 3 Al 5 O 12 ) is considered as a promising thermal barrier material. However, the main limitations of Yb 3 Al 5 O 12 for thermal barrier applications are relative low thermal expansion coefficient and high thermal conductivity . In order to overcome these obstacles, herein, a new high entropy (Y 0.2 Yb 0.2 Lu 0.2 Eu 0.2 Er 0.2 ) 3 Al 5 O 12 ceramic was designed, and then powders and bulk were prepared through solid-state reaction method and spark plasma sintering (SPS), respectively. The thermal expansion coefficient of HE (Y 0.2 Yb 0.2 Lu 0.2 Eu 0.2 Er 0.2 ) 3 Al 5 O 12 is (8.54 ± 0.29) × 10 −6 K -1 at 673 K–1273 K, which is about 9% higher than that of Yb 3 Al 5 O 12 . The thermal conductivity of HE (Y 0.2 Yb 0.2 Lu 0.2 Eu 0.2 Er 0.2 ) 3 Al 5 O 12 ceramic is 3.81 W·m -1 K -1 at 300 K, which is about 18 % lower than that of Yb 3 Al 5 O 12 . Moreover, there is no reaction between HE (Y 0.2 Yb 0.2 Lu 0.2 Eu 0.2 Er 0.2 ) 3 Al 5 O 12 and thermally grown (TG) Al 2 O 3 even at 1600 °C. After annealing at 1590 °C for 18 h, the average grain size of HE (Y 0.2 Yb 0.2 Lu 0.2 Eu 0.2 Er 0.2 ) 3 Al 5 O 12 increases only from 1.56 μm to 2.27 μm. Close thermal expansion coefficient to TG Al 2 O 3 , low thermal conductivity, good phase stability, excellent chemical compatibility with TG Al 2 O 3 and slow grain growth rate make HE (Y 0.2 Yb 0.2 Lu 0.2 Eu 0.2 Er 0.2 ) 3 Al 5 O 12 promising for thermal barrier applications.
研究领域:
材料科学
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热障涂层研究
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DOI
高影响因子
Heliyon
·
2023
·Vol. 9
·期 4
·e15357
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IF 4
Xiufeng Wu,Zhaoliu Cao,Jiang Ni,Xiaoyuan Zheng,Lizhen Zhu,Xin wang,Juan Lv,Shijun Zhou,Yongjuan Ding,Ruirong Wu
Mixing different kind inhalation medications for simultaneous inhalation is widely used in the treatment of chronic respiratory diseases, and it can minimize the administration time and improve patient adherence. To our knowledge, it is unclear whether beclomethasone (BDP, Clenil®) can bemixed with acetylcysteine (NAC, Fluimucil®), because the in vitro physico-chemical compatibility and aerosol characteristics of the mixture are unknown. In this study, we investigated physical compatibility, including the appearance, pH, osmotic pressure and chemical stability, as well as aerosol characteristics, including particle size corresponding to 10%/50%/90% of the cumulative percentage of total particle volume ( X 10/ X 50/ X 90), volume median droplet diameter (VMD), mass median aerodynamic diameter (MMAD), fine particle fraction (FPF), fine particle dose (FPD) and geometric standard deviation (GSD), delivery rate, and total delivery of the above solutions. After mixing, there were no significant changes in visual appearance, pH, osmolality and drug content of the mixtures at room temperature for 12 h. The FDP of BDP in the mixture decreased by 16.49%, whereas the NAC increased by 10.85%. The delivery rates of BDP and NAC in the mixture decreased by 66.05% and 45.54%, and total delivery increased by 13.20% and 25.29%, respectively. However, the MMAD, FPF, particle size and GSD of the mixture were almost unchanged. We demonstrated that these admixtures are physico-chemically compatible but that coadministration of beclomethasone with acetylcysteine can markedly affect output and aerosol characteristics.
研究领域:
药理学
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呼吸病学
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药物递送系统
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
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IF 5.532
Zhuo Xing,Chi Ma,Juhai Weng
Dense LiCuVO 4 ceramics with a relative density of 95% were facilely fabricated using a conventional solid-state method at low temperatures (∼660 °C). Promising microwave dielectric properties were obtained with a moderate relative permittivity ( ε r ) of 16.9 ± 0.3 and a quality factor ( Q × f ) of 15,200 ± 300 GHz, but poor temperature stability of the resonance frequency (τ f ∼ −61.5 ± 3 ppm/°C). To compensate for the negative τ f value, rutile TiO 2 with a positive τ f value was added to form a series of composite ceramics (1- x )LiCuVO 4 - x TiO 2 . As regards, a zero-close τ f value (∼−1.4 ppm/°C) was achieved at x = 0.6 compositions with an ε r of 18.6 ± 0.3 and a Q × f of 18,000 ± 400 GHz. Additionally, the LiCuVO 4 ceramic has good chemical compatibility with silver electrodes. All results support the prospective applications of LiCuVO 4 in low-temperature cofired ceramics (LTCC) as substrates.
研究领域:
材料科学
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电气工程
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陶瓷
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DOI
高影响因子
Pharmaceutics
·
2020
·Vol. 12
·期 1
·78
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IF 4.421
Rui Zhang,Junhua Hu,Liangjun Deng,Sha Li,Xi Chen,Fei Liu,Shanping Wang,Khaja Shameem Mohammed Abdul,Huimin Beng,Wen Tan
Inhalation therapy with a nebulizer is widely used in chronic respiratory disease. Mixing inhalation solutions/suspensions for simultaneous inhalation is more convenient and might simplify the administration procedure. However, there are no data available to address the in vitro aerosol characteristics and physico-chemical compatibility of Combivent®(containing Salbutamol and Ipratropium bromide) with other inhalation solutions/suspensions. In order to investigate the in vitro aerosol characteristics and physico-chemical compatibility of Combivent®with Budesonide, Beclomethasone, andN-acetylcysteine, the appearance, pH, osmotic pressure, chemical stability, mass median aerodynamic diameter (MMAD), fine particles fraction (FPF), particle size corresponding to X50 (particle size, which accounts for 50% of the total cumulative percentage of volume of all particles), delivery rate, and total delivery of the mixed inhalation solution/suspension were tested. There was no change in the appearance such as a change in color or precipitation formation at room temperature. The pH, osmolality, and chemicals of the mixtures were stable for 24 h after mixing. There were no significant differences between Combivent®, Budesonide, Beclomethasone,N-acetylcysteine, and the mixtures in MMAD, FPF, X50, the delivery rate, and the total delivery. This indicates that the mixtures were physically and chemically compatible. The mixing did not influence the particle size, distribution, or delivery compatibility of the mixtures.Keywords:inhalation;nebulizer;physico-chemical;particle size and distribution;delivery compatibility;Combivent®;Budesonide;Beclomethasone;N-acetylcysteine
研究领域:
药学
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呼吸系统疾病
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2025
·
IF 8.9
Qingguang Bao,Danhui Wang,Xuemei Yan,Ning Wang,Shan Cheng,Qingfeng Sun,Nan Li,Xigao Jian
In this paper, a soluble polyphthalazine biphenyl ether nitrile containing carboxyl and sulfonic acid groups (SPPBEN-COOH) was synthesized, and a water-soluble sizing agent was prepared to enhance the interface performance and wear resistance of SCF/PPEK composites. SPPBEN-COOH has excellent thermal properties (T g = 244 °C) and good solubility. Compared with UCF/PPEK composites, the wear resistance of the modified composites increased by 52.8 %. In addition, molecular dynamics simulation was utilized to calculate the chemical compatibility between the sizing agent and the resin. Meanwhile, the impact of the sizing agent on the interfacial bonding strength of the composite was investigated. This study not only offers an environmentally friendly approach for enhancing the interfacial and tribological properties of SCF/PPEK composites, but also provides valuable insights for the design of high-performance thermoplastic composites. Additionally, it contributes to a scientific understanding of the microscopic mechanisms involved in interfacial enhancement.
研究领域:
材料科学
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聚合物复合材料
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表面工程
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化学工程
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机械工程
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产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
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IF 6.3
Wenyuan Liu,Hao Liu,Zhoufu Wang,Honghong Wang,Yan Ma,Zhenghuang Quan,Xitang Wang
Composite phase change materials are particularly valuable for high temperature thermal energy storage and waste heat recovery, but the poor energy storage density and thermal conductivity limit their practical applications. Herein, this study proposed a concurrent enhancement of composite materials by utilizing SiO 2 nanoparticles-decorated KCl-NaCl as phase change materials and forsterite with high specific heat as matrix materials. The results showed that forsterite and chloride salts exhibited excellent chemical compatibility, and the appropriate content of chloride salts and suitable molding pressure were beneficial to enhancing the densification of composite materials while increasing their thermal and mechanical properties. Specifically, the composite materials with chloride salts content of 60 wt% and molding pressure of 40 MPa demonstrated the best performance, with an energy storage density of 901.7 J/g (100–800 °C), a latent heat of 180.5 J/g, thermal conductivity of 0.78–1.47 W/(m·K) at 100–500 °C, and a compressive strength of 41.5 MPa. Notably, the addition of 1.0 wt% SiO 2 nanoparticles resulted in the formation of needle-like nanostructures, which enhanced the thermal conductivity and energy storage density of composite materials. The composite materials exhibited good chemical stability after 500 thermal cycles, accompanied by an enhancement in thermal conductivity due to the formation of middle layer between forsterite and chloride salts. This suggests a promising potential for composite materials in thermal energy storage applications.
研究领域:
材料科学
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储能
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纳米技术
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热工学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2023
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IF 5.7
Peixiong Zhang,Enhui Wang,Chunyu Guo,Tao Yang,Xinmei Hou
High-entropy rare earth phosphates (HE REPO 4 , RE = Ho, Tm, Yb, Lu, Dy, Er and Y) with xenotime structure have been successfully synthesized and comprehensively characterized to evaluate their feasibility as thermal/environmental barrier coatings (T/EBCs) applied in SiC f /SiC ceramic matrix composites (SiC-CMCs). HE REPO 4 show good chemical compatibility with SiO 2 at 1400 °C and excellent high-temperature stability up to 1750 °C. The thermal expansion coefficient (TEC) of HE (6RE 1/6 )PO 4 is 5.9 × 10 −6 /°C ranging from room temperature to 900 °C, which is close to that of SiC-CMCs. Compared with single-component REPO 4 , the thermal conductivity of HE (6RE 1/6 )PO 4 (from 5.1 W·m −1 ·K −1 at 100 °C to 2.8 W·m −1 ·K −1 at 1300 °C) is significantly reduced benefiting from larger lattice distortion. These allow HE REPO 4 to be a potential candidate as T/EBCs applied in SiC-CMCs.
研究领域:
材料科学
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陶瓷
·
涂层
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 1
·223-233
·
IF 3.9
Zhenjun Qing,Huapeng Zou,Xin Zhou,Haiyan Li,An Liu,Shumin Duan,Yingxiang Li,Sen Peng
Li 2 Co 2 Mo 3 O 12 (LCMO) ceramics were synthesized using the solid-state reaction method. X-ray diffraction analysis results indicated that the sole crystalline phase present in the ceramics was LCMO, which belongs to the orthorhombic structure of the Pnma space group. The sample, which was sintered at 850°C, demonstrated outstanding microwave dielectric properties, with an ε r value of 8.95, a Q × f value of 43 200 GHz, and a τ f value of –71.3 ppm/°C. It was found that while the main factor influencing ε r was ionic polarizability, sintering density had a lesser effect on it. Furthermore, Q × f was primarily affected by relative density, and there was no significant relationship between packing fraction and this property. The higher the degree of distortion of the [Li/CoO 6 ] octahedron is, the poorer the τ f value of LCMO ceramics. Additionally, the microwave dielectric properties of LCMO ceramics were intrinsically linked to ionicity, lattice energy, bond energy, and thermal expansion coefficient of chemical bonds, with Mo–O bonds being the primary factor affecting these properties, as supported by analysis using chemical bonding theories. Mo–O bond vibration dominated the Raman spectra. Good chemical compatibility between silver and LCMO ceramics was demonstrated through our co-firing experiment.
研究领域:
材料科学
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陶瓷
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微波介质
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固态化学
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拉曼光谱
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）