Ceramics International最新文献

{"title":"Optimizing damage resistance and structural evolution in CaO-modified Li2O-Al2O3-B2O3-TiO2-P2O5 glass-ceramics","authors":"Sijia Hu ,&nbsp;Kun Zhou ,&nbsp;Zuzhi Huang ,&nbsp;Hao Zhang ,&nbsp;Hailei Xie ,&nbsp;Feng He ,&nbsp;Shuwang Duo ,&nbsp;Jiang Shi","doi":"10.1016/j.ceramint.2024.09.408","DOIUrl":"10.1016/j.ceramint.2024.09.408","url":null,"abstract":"<div><div>Aluminoborate glass, recognized for its remarkable crack resistance, presents significant potential as a cover material for portable electronic devices. Nevertheless, its relatively low hardness has been a limiting factor. This study synthesized a series of 11 Li₂O-30 Al₂O₃-(55-x) B₂O₃-2 TiO₂-2 P₂O₅-xCaO (wt%), with x varying from 0 to 10, employing the melt-cast method. The resultant glass-ceramics were produced via heat treatment at 590 °C for 2 h, followed by a systematic examination of their structural and mechanical properties. The investigation demonstrated that an increase in CaO content diminishes crystallization and induces a morphological transition in the crystalline phases from granular and short rod-like structures to lath-like formations, which subsequently impacts the coordination environment of Al and B atoms. With a CaO content of 2 %, the GC2 sample precipitated Li(Al₇B₄O₁₇) and Li₂AlB₅O₁₀ phases, achieving a compressive strength (CR) value of 15.0 N, a hardness of 7.51 GPa, and a fracture toughness of 1.50 MPa m^0.5. This glass-ceramic exhibited optimal scratch resistance and visible light transmittance exceeding 85 %, underscoring its considerable promise for application as smartphone cover glass due to its impressive overall damage resistance.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50635-50647"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on prestressed coating reinforced magnesia porcelain","authors":"Yuhui Wang ,&nbsp;Yueming Li ,&nbsp;Yi Sun ,&nbsp;Kai Li ,&nbsp;Xiaona Zhang ,&nbsp;Hongbing Wei ,&nbsp;Yuanyuan Huang ,&nbsp;Jia He ,&nbsp;Detian Wan ,&nbsp;Yiwang Bao","doi":"10.1016/j.ceramint.2024.09.426","DOIUrl":"10.1016/j.ceramint.2024.09.426","url":null,"abstract":"<div><div>The current study aimed at the preparation of high strength magnesia porcelain. In this study, a coating basic formula of natural ceramic materials of Longyan kaolin (41.94 wt%), burnt talc (52.68 wt%) and Al₂O₃ (5.38 wt%) were used. In addition, right amount of potassium feldspar and ZnO were added to adjust the coating properties. High strength magnesia porcelain was obtained by the difference of thermal expansion coefficient between coating and substrate. The study focused on the changes in the cross-sectional area ratio and thermal expansion coefficient between the coating and matrix, as well as the effect of adding potassium feldspar and ZnO on the flexural strength of ceramics. Following the addition of 4 wt% ZnO and 13 wt% potassium feldspar, the results indicated a thermal expansion coefficient difference of 3.25 × 10⁻⁶/°C and a cross-sectional area ratio of approximately 54.40. The resulting composite ceramics sintered at 1220 °C for 60 min had their flexural strength reached 237.09 ± 26.70 MPa, which was 56.53 % higher than the matrix's flexural strength of 151.70 ± 5.32 MPa. Additionally, a study of the composite ceramics' resistance to thermal shock showed an increase in the critical temperature of decrease in flexural strength from 200 °C to 220 °C.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50801-50809"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 evolution and mechanical properties of SrTiO3 ceramic joint brazed by SnO–ZnO–P2O5–SiO2 phosphate glass","authors":"Ding Hao ,&nbsp;Wei Guo ,&nbsp;pengkun Liu ,&nbsp;Jiafen Song ,&nbsp;Jingru Xin","doi":"10.1016/j.ceramint.2024.09.410","DOIUrl":"10.1016/j.ceramint.2024.09.410","url":null,"abstract":"<div><div>The study uncovers the microstructure and mechanical properties of brazed joints between SrTiO₃ ceramics and a phosphate glass with the composition 49SnO-19ZnO-32P₂O₅-3SiO₂. The primary objective is to investigate the wettability of the phosphate glass on SrTiO₃ ceramics and the evolution of joint strength over varying holding times. Key findings reveal that the phosphate glass exhibits favorable wettability on SrTiO₃ ceramics. The formation of Zn₂P₂O₇ and SnP₂O₇ phases in the joint microstructure and the amount of these two phases gradually increases with the holding time. The mechanical performance is highlighted by the achievement of a peak shear strength of 40.3 MPa after brazing at 560 °C for 10 min. Additionally, the hardness, elastic modulus, and plasticity of the Zn₂P₂O₇ and SnP₂O₇ phases were found to be intermediate between those of the SrTiO₃ matrix and the glass. The formation of these two phases significantly enhances the mechanical properties of the joint.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50657-50666"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Properties of CaO-MgO-SiO2 insulating refractories prepared from phosphorus tailings","authors":"Junming He ,&nbsp;Yaowu Wei ,&nbsp;Xiujuan Wang ,&nbsp;Jin Zhang ,&nbsp;Dahai You ,&nbsp;Yanping Wang","doi":"10.1016/j.ceramint.2024.09.433","DOIUrl":"10.1016/j.ceramint.2024.09.433","url":null,"abstract":"<div><div>CaO-MgO-SiO₂ insulating refractories were prepared using phosphorus tailings through in-situ pore-forming technology in this work, aiming to achieve the efficient utilization of solid waste phosphorus tailings. microsilica was used to react with free CaO generated by the decomposition of dolomite from phosphorus tailings during the calcination in order to prevent the hydration of CaO in the materials. The influence of microsilica addition and heating temperature on the properties of insulating refractories prepared from phosphorus tailings was investigated. The results showed that CaO-MgO-SiO₂ insulating refractories with 8.8 wt% microsilica addition exhibited excellent comprehensive performance after heating at 1300 °C for 3 h. The insulation refractories prepared from phosphorus tailings were anti-hydration, had lower thermal conductivity, and could be used as insulation refractories for high-temperature kilns.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50867-50875"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel far-red-emitting phosphor Ca2InTaO6:Mn4+ with excellent responsiveness to phytochrome PFR for plant growth","authors":"Shigao Chen ,&nbsp;Xuemei Yao ,&nbsp;Yue Yang ,&nbsp;Ya Yang ,&nbsp;Yufeng Du ,&nbsp;Yun Cheng ,&nbsp;Mohan Yu ,&nbsp;Xianchao Du ,&nbsp;Huajuan Deng ,&nbsp;Ruijin Yu","doi":"10.1016/j.ceramint.2024.09.429","DOIUrl":"10.1016/j.ceramint.2024.09.429","url":null,"abstract":"<div><div>A series of novel Ca₂InTaO₆ perovskite compounds doped with Mn⁴⁺ ions were successfully synthesized via the conventional solid-state method at elevated temperatures. The X-ray powder diffraction (XRD) technique was utilized to capture the phase structure. Based on the analysis of diffuse reflection (DR) spectra and density functional theory (DFT) calculations, it can be concluded that Ca₂InTaO₆ exhibits characteristics of an indirect semiconductor with a band gap <em>E</em>_g = 3.526 eV. With a 367 nm excitation, the Mn⁴⁺-doped Ca₂InTaO₆ exhibits a far-red emission at 689 nm, corresponding to the ²E_1g to ⁴A_2g transition. The photoluminescence (PL) characteristics of the sample align well with the absorption properties of phytochrome far-red light (P_FR). Based on analysis using the Tanabe-Sugano diagram, it can be inferred that Mn⁴⁺ is situated in a highly intense crystalline field for the ²E_1g state. At concentration <em>x</em> = 0.006, the most optimal Mn⁴⁺ doping was achieved, ascribing to the nearest neighbour ion interaction. The internal quantum efficiency (IQE) is 35.48 %. The Commission International del'Eclairage (CIE) coordinates of a red LED fabricated with Ca₂InTaO₆:0.006Mn⁴⁺ phosphor is located in the red region. Moreover, the electroluminescent spectrum (EL) exhibited by the enclosed lamp has a larger overlapping with the chlorophyll P_FR (85.68 %) than P_R (22.27 %) absorption spectra for promoting plant growth. This study not only provides detailed guidelines for evaluating the practical usability enhancing the P_R to P_FR conversion of Ca₂InTaO₆:0.006Mn⁴⁺, but also presents a thorough examination of the luminescent characteristics demonstrated by the Mn⁴⁺ activators.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50821-50833"},"PeriodicalIF":5.1,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142701366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic behaviors of interfacial oxides and elements during the ultrasonic-assisted diffusion bonding of 6063Al alloys","authors":"Pu Zhao ,&nbsp;Xiangyu Gao ,&nbsp;Zhengwei Li ,&nbsp;Yuanhang Xia ,&nbsp;Zhiwu Xu ,&nbsp;Jiuchun Yan","doi":"10.1016/j.ceramint.2024.09.400","DOIUrl":"10.1016/j.ceramint.2024.09.400","url":null,"abstract":"<div><div>Efficiently breaking the oxide layer and rapidly diffusing of elements at low-temperature has been a longstanding goal in the diffusion bonding (DB) of Al alloys. To break the interfacial oxide layers and accelerate atomic diffusion, ultrasound energy was introduced during the DB of 6063Al. A full Zn–Al eutectoid joint was manufactured via a pure Zn interlayer at 360 °C in atmospheric by an ultrasonic-assisted diffusion bonding (U-DB) at only an ultrasonic vibration of10 min. During U-DB, brittle cracks were formed in the interfacial oxide layers due to high strain rate induced by ultrasonic action. Zn diffused into Al alloy through the brittle cracks in oxide layers via “subcutaneous diffusion,” forming a Zn–Al eutectoid diffusion region between the Al alloy and oxide layer. The oxide fragments irregularly migrated to the center of the joint due to Kirkendall effect and ultrasonic action, finally dispersed in the bonded metal. The bonded metal finally transformed as a full Zn–Al eutectoid phase after consuming interlayer. The shear strength of the Zn–Al eutectoid joint reached 82.6 MPa. The Zn–Al mutual diffusion coefficient of U-DB at 360 °C was ∼0.6 μm²/s, which was about 20 times higher than the thermal diffusion coefficient under same temperature condition. Additionally, the mechanism of ultrasonic-assisted diffusion based on the strain-driven diffusion mode was discussed in detail.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50548-50559"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rational sonochemical synthesis of S-scheme Bi2O2CO3/ZnO heterojunction for photocatalytic expelling of harmful rhodamine B dye from wastewater under natural sunlight","authors":"Ali Alsalme ,&nbsp;Khaled M.A. Elmoneim ,&nbsp;Nagy N. Mohammed ,&nbsp;Khairy Mohamed ,&nbsp;M.F. Abdel-Messih ,&nbsp;Ayman Sultan ,&nbsp;M.A. Ahmed","doi":"10.1016/j.ceramint.2024.09.407","DOIUrl":"10.1016/j.ceramint.2024.09.407","url":null,"abstract":"<div><div>In this novel research study, S-scheme Bi₂O₂CO₃/ZnO heterojunctions were fabricated for photocatalytic destructing of rhodamine B dye under low cost natural sunlight of 1000 W power. Spherical Bi₂O₂CO₃ nanoparticles with wide band gap energy of 3.15 eV and diameter of 26 nm were deposited onto ZnO nanoparticles in ultrasonic bath of 300 W power. Photoluminescence [PL], Mapping, N₂–adsorption–desorption isotherm, diffuse reflectance spectrum [DRS], high resolution transmission electron microscopy [HRTEM], X-ray diffraction [XRD] and energy dispersive X-ray [EDX] were employed to investigate the physicochemical characteristics of the solid specimen. PL and DRS analysis implied that introducing various proportions of Bi₂O₂CO₃ on ZnO surface enhanced the absorbability of visible light radiations and improved the charge carrier separation and transportation efficiency. The photocatalytic experimental results implied that ZnBiCO1 heterojunction containing 1 wt % Bi₂O₂CO₃ was responsible for destructing 97 % of RhB dye in 180 min. The scavenger experiments and the photoluminescence analysis of terephthalic acid revealed the production of reactive oxygen species as direct evidence for S-scheme charge transportation mechanism. The purpose of this innovative research is concerned with construction of an efficient S-scheme heterojunction with auspicious oxidative and reductive power for eliminating rhodamine B dye as cationic pollutant model.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50622-50634"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sol–gel derived Bi2NiNb2O9 pyrochlore: Synthesis, characterization and dielectric properties","authors":"N.A. Zhuk ,&nbsp;K.A. Badanina ,&nbsp;R.I. Korolev ,&nbsp;M.G. Krzhizhanovskaya ,&nbsp;N.A. Sekushin ,&nbsp;V.A. Belyy ,&nbsp;B.A. Makeev","doi":"10.1016/j.ceramint.2024.09.385","DOIUrl":"10.1016/j.ceramint.2024.09.385","url":null,"abstract":"<div><div>The Pechini method was used for the first time to synthesize the phase-pure nickel-containing cubic pyrochlore Bi₂NiNb₂O₉ (space group Fd-3m, <em>a</em> = 10.5371(5) Å), while the solid-phase reaction method provided no possibility to obtain impurities-free pyrochlore. At a synthesis temperature of 950°С, low-porosity ceramics with indistinct grain boundaries were formed. The results of elemental mapping indicated a uniform distribution of metal atoms on the surface of the sample. The X-ray energy dispersive analysis showed that the chemical composition of the synthesized sample corresponded to the predetermined theoretical composition. The calcination of the sample synthesized by the Pechini method was studied by the thermal analysis up to 1100°С. The functional composition of intermediate synthesis products was analyzed by vibrational spectroscopy (FTIR). In the FTIR spectrum of pyrochlore (4000–400 cm⁻¹), absorption bands were identified at 829, 540, 654, and 490 cm⁻¹. The dielectric properties of the pyrochlore were studied using an impedance spectroscopy. Pyrochlore Bi₂NiNb₂O₉ has the high relative dielectric permittivity of 145 and low dielectric losses of 0.001 (at 24°С, 1 MHz), which make it a promising for dielectric in multilayer ceramic capacitors.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50397-50409"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elastic and layered carbon/silica composite nanofibrous aerogels through solution blow spinning","authors":"Wenlu Zhang ,&nbsp;Longze Chen ,&nbsp;Pengfei Xiang ,&nbsp;Xue Qin ,&nbsp;Wenbin Li ,&nbsp;Chong He","doi":"10.1016/j.ceramint.2024.09.419","DOIUrl":"10.1016/j.ceramint.2024.09.419","url":null,"abstract":"<div><div>Carbon fibrous aerogels, distinguished by low density, outstanding mechanical properties and thermal stability, hold great promise for applications in aerospace, military, and environmental protection. However, large-scale production and precise structure control of carbon fibrous aerogels present significant challenges. Herein, solution blow spinning combined with rotating receiving apparatus was employed to fabricate elastic lamellar carbon/silica nanofibrous aerogels (CSNFAs). The utilization of receiving apparatus for traction enabled efficient assembly of PAN nanofiber networks into layered and stacked structure. Interlayer spacing of CSNFAs could be finely tuned within range of 30–250 μm by adjusting speed with range of 500–1000 RPM. The mesoporous architecture of CSNFAs, along with their intrinsic properties, significantly enhanced adsorption capabilities. Integration of lamellar structure enabled precise control over thermal stability. Capitalizing on laminated structure, CSNFAs exhibited excellent compressive elasticity while maintaining exceptional super elasticity across extreme temperatures ranging from 600 °C to −196 °C. CSNFAs guaranteed reliable performance across a wide temperature range and supported repeated use.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50748-50756"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative study of TiO2, Ta2O5 and Nb2O5 coated Ti6Al4V titanium alloy for biomedical applications","authors":"Haiyang Li ,&nbsp;Yifan Ding ,&nbsp;Xujun Hu ,&nbsp;Wenyuan Li ,&nbsp;Zeliang Ding","doi":"10.1016/j.ceramint.2024.09.390","DOIUrl":"10.1016/j.ceramint.2024.09.390","url":null,"abstract":"<div><div>Refractory metal oxides such as titanium dioxide (TiO₂), tantalum oxide (Ta₂O₅), and niobium oxide (Nb₂O₅) coated-titanium and its alloys for medical applications have recently gained significant attention due to their remarkable properties, including high hardness, strong chemical inertness, and excellent biocompatibility. However, comparative studies among them remain scarce. In this study, thin films of Ta₂O₅, Nb₂O₅, and TiO₂ were deposited on Ti6Al4V titanium alloy using radio frequency sputtering technology. Their properties were comparably evaluated through a series of tests, including scratching, nanoindentation, friction and wear, potentiodynamic polarization, and cell cultivation experiments. The results revealed that all three coatings, with a thickness of approximately 2.6–2.8 μm, exhibited an amorphous columnar growth pattern with dense surfaces resembling cauliflower. The bonding force of the TiO₂ coating exceeds 50 N, which is 26.2 times and 14.5 times greater than that of Ta₂O₅ and Nb₂O₅, respectively. Furthermore, all coated samples demonstrate superior wear resistance, corrosion resistance, and biocompatibility compared to bare Ti6Al4V. Among the coatings, TiO₂ showed the best performance, followed by Ta₂O₅, while Nb₂O₅ exhibited the least favorable performance. These findings revealed the performance differences among the three ceramic coatings on Ti6Al4V samples and offer valuable insights for further research and the selection of coatings to enhance the properties of Ti6Al4V titanium alloy for biomedical applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 50444-50453"},"PeriodicalIF":5.1,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}