CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jia Liu,Feng Luo,Song Liu,Xiaodun Deng,Xiyuan Wei,Zhimin Li,Hongliang Du
Lead-based piezoelectric ceramics are the preferred material for commercial piezoelectric ceramic actuators due to their high performance and irreplaceability. However, the operating temperature (<100 °C) and strain (0.1 %∼0.2 %) of lead-based piezoelectric ceramics are still limited. Achieving large strain in a wide temperature range remains challenging. In this paper, a new strategy is proposed to effectively increase the strain value of lead-based piezoelectric ceramics through domain engineering. The new x PbTiO 3 -(0.97- x )PbZrO 3 -0.03(La 0.1 Sr 0.80.1 )TiO 2.95 ( x PT-PZ-LST) ternary piezoelectric ceramic system reaches a strain value as high as 0.5 % and exhibits extremely high temperature stability (13 %) in the range of 25–230 °C. By fine-tuning the content of PT components, the average length and width of a typical tetragonal domain are transformed from 800 nm to 80 nm (long and thin) to 300 nm and 200 nm (short and wide), relatively. From the experimental results of PFM and Rayleigh analysis, the high strain can be attributed to the synergistic effect of the reduced coercive field ( E c ), enhanced micro-region response, and regulated domain morphology, which ensures that high intrinsic and extrinsic contribution can be achieved at the same time. In this paper, a new strain regulation method is provided for lead-based piezoelectric ceramics, and a valuable large strain material is obtained via domain engineering.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Mengjiao Zhang,Tianbao Shi,Yitong Li,Bin Liu,Zhiwu Liang,Paitoon Tontiwachwuthikul,Jin-Heng Li
Amine-based chemical absorption remains a promisingly powerful technology for carbon dioxide (CO 2 ) capture. However, enhancing the performance of absorbents remains a significant challenge. In this study, three sterically hindered amines (SHAs), including 2-( tert -butylamino)ethanol, 2-amino-2-methyl-1-propanol, 2-amino-2-methylpropane-1,3-diol were selected as the primary absorbents with piperazine (PZ) employed as an activator. Absorption and desorption experiments were conducted for various PZ-SHAs systems with a total amine concentration of 30 wt% under conditions of 313 K and 13 kPa CO 2 partial pressure. The CO 2 absorption capacity, initial absorption rate, desorption rate, and desorption energy consumption were systematically evaluated, indicating that the addition of PZ as an activator could effectively improve the trapping capacity of the spatially hindered amine, and keep a high recycling capacity and low regeneration energy. Finally, the CO 2 reaction mechanism under the new system was clarified by 13 C nuclear magnetic resonance (NMR) technique.
研究领域:
化学工程
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碳捕集与封存
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环境科学
·
吸收技术
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产品关联
DOI
高影响因子
ENERGY & FUELS
·
2016
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IF 2.835
Qiangwei Li,Yi Wang,Shanlong An,Lidong Wang
Using a K2CO3/piperazine (PZ) mixture as a typical phase-change absorbent has promising applicability for carbon dioxide (CO2) capture in coal-fired power plants that would contribute to low energy consumption for solvent regeneration. In this study, the reaction rate of CO2 with a concentrated K2CO3/PZ mixture was measured in a wetted-wall column. At a CO2 loading close to saturation absorption, correlative physical parameters were calculated. The effects of operating conditions, including gas flow rate, slurry flow rate, PZ concentration, CO2 loading, K2CO3 mass fraction, and temperature, on the absorption rate of CO2 were investigated. The results showed that the absorption rate was sensitive to the effects of the gas flow rate and CO2 loading. The PZ concentration and K2CO3 mass fraction also substantially influenced the CO2 absorption rate. However, minor changes in the CO2 absorption rate were observed when the slurry flow rate and temperature were increased. On the basis of a pseudo-first-order model, the absorption rate determined in this study was found to be controlled by mass transfer in both the gas film and the liquid film. The results can serve as a useful reference for designing CO2 removal systems using K2CO3/PZ mixtures.
研究领域:
化学工程
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环境科学
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能源技术
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气体分离
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工业催化
✓ 已验证
DOI
高影响因子
Greenhouse Gases-Science and Technology
·
2019
·Vol. 9
·期 2
·349-359
·
IF 1.693
Ji Liu,Xiaoshan Li,Zewu Zhang,Liwei Li,Yajun Bi,Liqi Zhang
The carbon dioxide post-combustion capture process using amine solutions is considered the most appropriate method for CO 2 capture from flue gas in power plants. This paper focuses on the CO 2 capture performance of six common organic amines. Two amines, piperazine (PZ) and diethylenetriamine (DETA), which showed better performance, were then filtered out to form amine blends to improve performance further. The absorption heat from the CO 2 absorbing process was measured directly using an advanced C80 micro calorimeter for more accurate calculation of regenerative energy consumption. Experimental results confirmed the optimal amine blend to be 10% PZ plus 20% DETA, with a 42% increase in absorption capacity and a 9% increase in initial absorption rate compared to traditional 30% monoethanolamine (MEA). The regeneration energy consumption of this chosen PZ-DETA blend was calculated to be 3.979 GJ/ton CO 2 , a decrease of 9% compared with MEA. Moreover, it led to an improvement of about 55% in stable cyclic absorption capacity in comparison with 30% MEA. It was confirmed that this PZ-DETA blend can bring practical economic benefits to industrial applications when replacing the current 30% MEA solution. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 30
·11581-11587
·
IF 3.3
Haoran Yu,Liang Cao,Jiajia Wang,Jian Guo,Ji Zhang,Shan-Tao Zhang
Pb(Ni1/3Nb2/3)O3-PbZrO3-PbTiO3 (PNN-PZ-PT) is one of the typical relaxor-PT piezoelectric systems. In order to further improve its Curie temperature (Tc) and piezoelectric properties, nominal Pb(Mg1/3Nb2/3)O3 (PMN) is introduced into 2mol% Sm-doped 0.36PNN-0.28PZ-0.36PT to form a (0.36 − x)PNN-xPMN-0.28PZ-0.36PT:0.02Sm (x = 0–0.24) quaternary solid solution. The phase, microstructure, domain structure, and electrical properties of the solid solution ceramics were investigated systematically. All the samples exhibit a single phase perovskite structure and are situated around the rhombohedral-tetragonal morphotropic phase boundary. With increasing x, the Tc increases gradually, while the piezoelectric coefficient d33 increases initially and decreases subsequently, reaching a peak value of 725 pC N−1 at around x = 0.15. In particular, this optimal composition illustrates high performance with Tc = 176 °C, planar electromechanical coupling factor kp = 0.63, remanent polarization Pr = 30 μC cm−2, and coercive field Ec = 8.9 kV cm−1. This study illustrates the viability of incorporating PMN into PNN-PZ-PT to optimize the comprehensive electrical properties, potentially offering a valuable guide for developing high performance relaxor-PT materials.
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 10
·期 1
·337-345
·
IF 7.393
Hongrui Jia,Zhigang Liang,Zhen Li,Fei Li,Linghang Wang
Ferroelectric ceramic materials with large and temperature-insensitive strain responses are highly desired for the practical application of actuators in harsh environmental conditions. In this work, novel xBi(Mg1/2Zr1/2)O3–(0.55 − x)PbZrO3–0.45PbTiO3 (xBMZ-PZ-0.45PT) ternary ferroelectric ceramics were successfully fabricated by a solid-state reaction process. The phase structure of xBMZ-PZ-0.45PT ceramics gradually evolves from rhombohedral-tetragonal coexistence phases to rhombohedral phase with an increase in the BMZ content and the diffuse phase transition behavior becomes increasingly evident. The relaxation behavior is strongest for x = 0.35 composition. Pmax and Pr values first gradually increased, and then gradually decreased with increasing BMZ content, while Ec values display an increasing trend. A large strain response of 0.33% at 5 kV mm−1 was obtained in this ternary ferroelectric ceramics with x = 0.35, which can be attributed to the electric field-induced reversible ergodic relaxation phase to the ferroelectric phase transition. The strain was simultaneously temperature-insensitive with a slight decrease from 0.33% at 30 °C to 0.32% at 150 °C. The results indicate that BMZ-PZ-PT ternary ferroelectric ceramics are promising candidate materials for actuator applications in harsh environmental conditions.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2023
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IF 9.9
Xueying Gao,Zhenzhen Fu,Yanfei Sun,Dewei Wang,Xiaoxuan Wang,Zishan Hou,Jinrui Wang,Xia Liu,Shiyu Wang,Shuyun Yao,Huiying Zhang,Shuyuan Li,Zheng Tang,Weijie Fu,Kaiqi Nie,Jiangzhou Xie,Zhiyu Yang,Yi-Ming Yan
While MnO 2 has been identified as a potent agent in the desalination process , its efficacy is significantly impeded by its inherent poor electrical conductivity and substantial ion diffusion barriers . By orchestrating an interfacial electron bridge within the MnO 2 /g-C 3 N 4 heterostructure , reinforced through N p z -Mn d z 2 orbital hybridization, we have managed to significantly boost both SAC and SAR in the HCDI process. The reinforced N p z -Mn d z 2 orbital hybridization triggers a substantial electron transition from g-C 3 N 4 to MnO 2 , culminating in a high Mn d z 2 electron occupancy. Further analysis reveals the formation of a Mn N chemical bond at the MnO 2 /g-C 3 N 4 interface, operating as an essential electron transfer bridge from g-C 3 N 4 to MnO 2 . This process concurrently initiates a rise in the Mn d z 2 orbital energy level, equipping the Mn d z 2 electron with superior redox activity. With these enhancements, the manufactured MnO 2 /g-C 3 N 4 exhibits exemplary performance, boasting an improved SAC of 68 mg g −1 and SAR of 3.6 mg g −1 min −1 with a decreased energy consumption of 0.7224 kWh kg −1 at 1.2 V. This innovative work offers an unconventional roadmap for activating electron redox activity and thereby accelerating charge transfer in transition metal oxides .
研究领域:
材料科学
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环境科学
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电化学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2017
·
IF 4.601
Yannan Li,Jun Cheng,Leiqing Hu,Jianzhong Liu,Junhu Zhou,Kefa Cen
In order to reduce energy consumption of absorbent regeneration, an amine absorbent piperazine (PZ) was dissolved in an organic solvent N , N -dimethylformamide (DMF) to prepare a phase-changing PZ/DMF solution for CO 2 absorption with solid precipitate of PZ-carbamate. The CO 2 absorption capacity and peak rate of PZ/DMF solution were 22.9% and 29% higher than those of PZ/water solution, respectively. Based on differential scanning calorimetry/thermogravimetry experiments, biscarbamate PZ(CO 2 ) 2 2− and protonation PZ(H) 2 2+ compositions (34.5 wt%) in the PZ-carbamate precipitate mainly decomposed at peak temperature of 91.9 °C due to their instability, and then PZ(CO 2 ) composition (65.5 wt%) in the PZ-carbamate precipitate decomposed at peak temperature of 125.7 °C. The electrochemical corrosion tests and scanning electron microscopy revealed that PZ/DMF solution had much lower corrosivity than PZ/water solution.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
·
IF 2.196
Dong Fu,LeMeng Wang,ChenLu Mi,Pan Zhang
The absorption capacity of CO 2 in piperazine (PZ) promoted 2-diethylaminoethanol (DEAE) aqueous solution was measured. The viscosities of both CO 2 -unloaded and CO 2 -loaded PZ-DEAE aqueous solutions were measured and then modelled. The temperatures ranged from 303.2 K to 323.2 K. The mass fraction of PZ and DEAE respectively ranged from 0 to 0.075 and 0.3 to 0.5. The temperature and concentration dependences of absorption capacity were determined. The effects of temperature, mass fraction and CO 2 loading on viscosities are demonstrated.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Yutong Wang,Zili Fan,Menghan Yuan,Chenlin Zhang,Zihan Hu,Xinlin Cao,Xinming Zhou,Hui Fu
Biphasic absorbents are regarded as highly promising absorbents for carbon dioxide (CO 2 ) capture, owing to their potential energy savings and facile separation. This study introduces a novel piperazine (PZ)/2-(diethylamino)-ethanol (DEEA)/n-propanol (NPA) biphasic absorbent, in which the addition of NPA to the PZ/DEEA binary system results in a doubling of absorption rate, a reduction of the lower phase volume by over 50% to just 28.77% of the total volume, and a CO 2 enrichment level of up to 95.59%, achieving rich phase concentration. Furthermore, the PZ/DEEA/NPA absorbent exhibited excellent absorption-desorption stability and a high desorption efficiency (~ 90%), with a regeneration heat approximately 31% lower than that of benchmark monoethanolamine (MEA). NMR and molecular simulation analyses indicate that NPA's weak competitive solvation effect reduces dispersive interactions with CO 2 absorption products, thereby indirectly strengthening hydrogen bonding of products. This facilitates dense aggregation, resulting in a volumetrically contracted, high-concentration solid product during the final absorption stages. Additionally, corrosion assessments indicate that both fresh and CO 2 -saturated absorbents demonstrate extremely low corrosion rates, favoring industrial implementation. In conclusion, the PZ/DEEA/NPA biphasic absorbent proves to be a potential alternative to the conventional MEA for sustainable CO 2 capture.
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 5
·3329-3338
·
IF 3.5
Qinghu Guo,Pengbin Wang,Xiangyu Meng,Dongxu Li,Zhonghua Yao,Huajun Sun,Hua Hao,Hanxing Liu,Shujun Zhang
Multilayer ceramic actuators find extensive utility in applications requiring precise displacement control or force output, due to their advantages of high precision control, rapid response, low driving voltage, low power consumption, and so on. For practical applications, there is a need for high-performance multilayer ceramic actuators (MLAs) that combine cost-effectiveness, efficiency, and temperature stability. In this work, 1.5 mol%Sm-doped 0.25 Pb(Mg 1/3 Nb 2/3 )O 3 –0.36PbZrO 3 –0.39PbTiO 3 piezoelectric ceramics with PbO–CuO as sintering aid were fabricated. The addition of PbO–CuO significantly reduced the sintering temperature by 300°C, while having minimal impact on the piezoelectric properties. The optimized sintering condition, achieved at a low sintering temperature of 950°C with the introduction of a tiny 0.4 wt% sintering aid, yields impressive piezoelectric strain coefficient d 33 * = 690 pm/V. This substantiates the viability of employing low-cost Ag/Pd (90/10) as inner electrode, which can be co-fired with ceramic layer to fabricate MLA. This innovation enables a remarkable displacement of 1 µm at a low driving voltage of 200 V across a 9-layers piezoelectric actuator, accompanied by high-temperature stability, exhibiting <20% variation over the temperature range of 30–250°C. These results underscore a great potential for high-performance piezoelectric actuators over a broad temperature range.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yiming Zhao,Yongchun Zhang,Qi Liu,Xinwen Guo,Yang Cao,Nan Xu,Tianqinji Qi,Yongbo Chen,Shaoyun Chen
Water vapor contained in industrial waste gas will be accumulated in non-aqueous amine solvents when used for CO 2 capture and subsequently affect capture efficiency. While Piperazine (PZ) could be considered as an activator of the solution. Hence the effect of different contents of water and PZ added into the non-aqueous amine solvents on the CO 2 capture performance has been investigated. 13 C NMR has been used to identify the compounds present in aqueous CO 2 -rich amine solvents to characterize the mechanism of reactions. The energy consumption using 2-(ethylamino)ethanol (EMEA) water-lean amine solvent and aqueous monoethanolamine (MEA) solution was tested and compared on lab-scale, and further a comprehensive evaluation in a bench-scale pilot plant has been performed; It was found that the regeneration efficiency of the solution was reduced by approximately 10% when the water content was 10 wt%. The addition of PZ can recover the regeneration efficiency of the solvent to 94.2%. And its energy consumption was reduced by about 45% compared to the aqueous MEA solution in a 72-hour continuous absorption-desorption experiment. The results demonstrated that the aqueous PZ solution could improve the regeneration efficiency by involving in the proton transfer process. This work has proven that the blend of water-lean amine solvent and PZ is a novel, energy-efficient absorbent for CO 2 capture.
研究领域:
化学工程
·
环境科学
✓ 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）