Ceramics International最新文献

{"title":"Synthesizing mixed-phase TiO2 semiconductor catalysts via microwave-assisted rutile seed crystal: A new approach","authors":"Siyu Gong ,&nbsp;Ting Zhang ,&nbsp;Bingguo Liu ,&nbsp;Peng Liu ,&nbsp;Yifan Niu ,&nbsp;Zhenxing Yang ,&nbsp;Yuhao Jin ,&nbsp;Wang Chen ,&nbsp;Guangxiong Ji ,&nbsp;Shenghui Guo ,&nbsp;Libo Zhang","doi":"10.1016/j.ceramint.2024.12.319","DOIUrl":"10.1016/j.ceramint.2024.12.319","url":null,"abstract":"<div><div>The study introduces a microwave-assisted rutile seed crystal (RS) method to synthesise mixed-phase TiO₂ nanoparticles, controlling the rutile TiO₂ (TiO₂-R) phase content (<span><math><mrow><msub><mi>γ</mi><mi>R</mi></msub></mrow></math></span>) from 33.0 % to 99.3 % by adjusting the doping level of RS to 20.0 wt% in the metatitanic acid (MA). The sample, designated as MA-20, with the highest oxygen vacancy (O_v) concentration of 38.56 %, demonstrated over 99 % microwave absorption (minimum reflection loss (<span><math><mrow><mi>R</mi><mi>L</mi></mrow></math></span>) −56.8 dB) and a heating rate of 0.836 °C/s under 2000 W and 20 g. RS enhanced the dielectric property of MA, facilitating phase transition from anatase TiO₂ (TiO₂-A) to TiO₂-R above 600 °C, with critical temperatures between 800 and 1000 °C. MA-20, with a surface area of 1.9226 m²/g and pore size distribution of 9.0851 nm, showed that higher RS doping levels promoted phase transition and grain growth, thereby enhancing the crystallinity and charge transfer efficiency. More than 50 % of MA-20 particles were under 10 nm, and 94 % were below 100 nm, confirming the synthesis of TiO₂ nanomaterials. MA-20 exhibited excellent electromagnetic wave storage and conversion properties. Adjusting microwave parameters and RS levels controls <span><math><mrow><msub><mi>γ</mi><mi>R</mi></msub></mrow></math></span>, offering an efficient approach for preparing mixed phase TiO₂ catalysts, essential for semiconductor photocatalysis and overcoming TiO₂-A limitations.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 7","pages":"Pages 8880-8896"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512229","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":"Flash joining of C/C composite with Ag-Cu-Ti filler by spark plasma sintering: The promoting and inhibiting effects on the interfacial reactions","authors":"Xincheng Wang ,&nbsp;Yichen Wang ,&nbsp;Tairui Zhang ,&nbsp;Xiaochao Liu","doi":"10.1016/j.ceramint.2024.12.447","DOIUrl":"10.1016/j.ceramint.2024.12.447","url":null,"abstract":"<div><div>Sound C/C composite joint without intermetallic compound was obtained with Ag-Cu-Ti filler using spark plasma sintering (SPS) within a short time frame of 3–6 s. The influence of different discharge times on the joint morphology and shear strength at room temperature was investigated, and the mechanism of SPS heating process on the joint reaction was detailed discussed. The maximum joining temperatures of the sample reached 755 °C, 932 °C, 1106 °C and 1279 °C at discharge times of 3 s, 4 s, 5 s and 6 s, respectively. The results indicated that the reaction between Ti from the filler and C from the C/C composites was the basis for forming a reliable joint. However, despite the presence of Cu, there was no evidence of Ti-Cu intermetallic compounds formed in the reaction layer during the very short SPS heating processes, which was very different from the results obtained by conventional brazing using vacuum furnace. The maximum shear strength of the obtained C/C composite joints at room temperature reached 22.1 ± 3.5 MPa. This work opens a novel and flexible processing approach for joining materials in an efficient way and inhibiting the formation of harmful intermetallic compound phases in joints at the same time.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 10169-10173"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593498","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":"The microstructure, corrosion resistance, and thermal control properties of Al2O3/ZnO composite coatings synthesized in situ by plasma electrolytic oxidation","authors":"Tianyu Zhang ,&nbsp;Zhaoyang Zheng ,&nbsp;Zhe Jiang ,&nbsp;Huichao Yu ,&nbsp;Ruina Ma ,&nbsp;An Du ,&nbsp;Yongzhe Fan ,&nbsp;Xue Zhao ,&nbsp;Chongchong Li","doi":"10.1016/j.ceramint.2024.12.445","DOIUrl":"10.1016/j.ceramint.2024.12.445","url":null,"abstract":"<div><div>To improve the thermal control and corrosion resistance of aluminium alloys and to reduce the phenomenon of functional particle agglomeration, this paper employs in situ synthesis by plasma electrolytic oxidation (PEO) technique to obtain Al₂O₃/ZnO composite coatings with homogeneous dispersion of ZnO on aluminium substrate. The results showed that increasing the concentration of Zn²⁺ in a certain range could induce the formation of [Zn(OH)₄]^2- ions in the solution, which increased the anodic voltage and reacted to produce ZnO particles dispersed in the coating in the PEO reaction region. Among them, the coating prepared by adding 3 g/L ZnSO₄ has a solar absorptivity (α) of 0.43 and a high emissivity (<em>ε</em>) of 0.88, and the thermal control performance is significantly improved. In addition, due to the improvement of coating thickness and densification, the coating shows good corrosion resistance in corrosive environments, with a minimum corrosion current density of 4.457 × 10⁻⁹ A·cm⁻², which is three orders of magnitude lower than that of the substrate, and the protective efficiency of the coating reaches 99.87 %. This method improves the thermal control performance and corrosion resistance of the coating under the premise of ensuring the quality of the coating, and provides a new idea for obtaining coatings with excellent comprehensive performance.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 10143-10158"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593524","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":"Nanoengineering Cr2GaC/C hybrids for high-performance electromagnetic absorbers via sol-gel and electrospinning","authors":"Jian Liu ,&nbsp;Feiyue Hu ,&nbsp;Shengyu Xie ,&nbsp;Fushuo Wu ,&nbsp;Zhouquan Wang ,&nbsp;Zhihua Tian ,&nbsp;Peigen Zhang ,&nbsp;Wei Zheng ,&nbsp;Jianxiang Ding ,&nbsp;ZhengMing Sun","doi":"10.1016/j.ceramint.2024.12.452","DOIUrl":"10.1016/j.ceramint.2024.12.452","url":null,"abstract":"<div><div>MAX phases are promising electromagnetic wave absorption (EMA) materials due to their excellent conductivity, high-temperature stability, and resistance to oxidation and corrosion. However, their development is limited by a single energy loss mechanism and the need for high filler content, posing challenges for enhancing their wave absorption capability. Herein, a 0D/1D Cr₂GaC/C hybrid was synthesized using a sol-gel and electrospinning method. The bottom-up synthesis process resulted in uniformly sized Cr₂GaC particles (∼100 nm) and ensured their homogeneous distribution within the carbon nanofibers. The abundant heterogeneous interfaces between Cr₂GaC MAX phase nanoparticles and carbon enhanced interfacial polarization, while the carbon fiber network improved conduction loss. These combined effects resulted in excellent EMA properties of the Cr₂GaC/C hybrids, achieving a minimum reflection loss value of −70.2 dB and an effective absorption bandwidth of 4.49 GHz at a thickness of only 1.62 mm and an ultra-low filler content of 20 wt%. This work presents a promising route for enhancing the EMA performance of MAX phases through manipulation of MAX phase particle size and fabrication of in situ hybrids.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 10212-10219"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593590","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 and oxidation behavior of ZrB2-Modified high entropy silicide coatings on Ta substrate","authors":"Dexiang Tian ,&nbsp;Gang Zhao ,&nbsp;Jiali Mao ,&nbsp;Xinli Liu","doi":"10.1016/j.ceramint.2024.12.435","DOIUrl":"10.1016/j.ceramint.2024.12.435","url":null,"abstract":"<div><div>ZrB₂ modified high entropy silicide (Mo_0.2Cr_0.2Ta_0.2Nb_0.2W_0.2)Si₂ (MeSi₂) coating was prepared by slurry sintering method on Ta substrate. The effect of ZrB₂ content on the coating structure and the static oxidation resistance at 1200 °C and the evolution of the coating during oxidation process was studied. When the content of ZrB₂ exceeds 10 wt%, the outer layer is loose and composed of low silicide. The oxidation performance of MeSi₂ coating modified by 5 wt% ZrB₂ is the best, and ZrO₂ and ZrSiO₄ with high melting point were generated during oxidation. The combination of ZrO₂ and ZrSiO₄ acted as a protective framework that retarded the loss of SiO₂ during high-temperature oxidation, effectively reducing the permeability of oxygen, and extends oxidation protection time beyond 60 h.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 10041-10050"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593635","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":"Synthesis, optical properties, and oxide ionic transport features in Mn-Li-, Mn-Ru-, Mn-Ru-Li-codoped bismuth niobate pyrochlores","authors":"M.S. Koroleva ,&nbsp;N.F. Eremeev ,&nbsp;E.M. Sadovskaya ,&nbsp;V.A. Sadykov ,&nbsp;I.V. Piir","doi":"10.1016/j.ceramint.2024.12.412","DOIUrl":"10.1016/j.ceramint.2024.12.412","url":null,"abstract":"<div><div>For the first time, manganese bismuth niobates doped with Li and Ru atoms have been synthesized and investigated. The compositions Bi_{1.5-<em>x</em>}Li_<em>x</em>Mn_0.75Nb_{1.5-<em>y</em>}Ru_<em>y</em>O_7‒δ (<em>x</em> = 0, 0.1, 0.2; <em>y</em> = 0–0.5) are characterized by the pyrochlore structure. The distribution of dopants in the structure was determined by structural analysis and measurement of pycnometric density values. From the theoretical calculation and experimental optical data, the band gap (<em>E</em>_<em>g</em>) gradually decrease with Ru concentration. The mixed electron and oxygen conductivity was determined for the ceramics. Oxygen transport was investigated by temperature-programmed isotope exchange of oxygen (TPIE) with C¹⁸O₂ in a flow reactor and by experiments using an ion-blocked electrode. Oxygen diffusion activation starts at 200–250 °C for Ru-free compositions and at 50 °C for Ru-reach compounds, with oxygen transport numbers corresponding to <em>t</em>_<em>ion</em> = 0.2 and 0.7–0.8 at 400 °C, respectively. Electronic conductivity, moderate oxygen mobility (<em>D∗</em> ∼ 10⁻¹²–10⁻¹¹ cm²/s at 700 °C), chemical compatibility with La_0.7Sr_0.3MnO₃ perovskite (up to 800 °C) make the obtained pyrochlores a potential component of composite cathode material for intermediate temperature SOFCs.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 9807-9816"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593776","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":"Synthesis, crystal structure, and dielectric properties of high-entropy solid solutions xNa1/2Bi1/2TiO3 – (1-x)(Ba1/3Sr1/3Ca1/3)TiO3 (x = 0.2, 0.3, 0.4, 0.5, 0.6)","authors":"I.G. Sheptun ,&nbsp;O. Yu. Grapenko ,&nbsp;V.G. Smotrakov ,&nbsp;Yu. A. Kuprina ,&nbsp;K.A. Chebyshev ,&nbsp;Abhinav Yadav ,&nbsp;N.V. Ter-Oganessian","doi":"10.1016/j.ceramint.2024.12.400","DOIUrl":"10.1016/j.ceramint.2024.12.400","url":null,"abstract":"<div><div>High-entropy solid solutions <em>x</em>Na_1/2Bi_1/2TiO₃ – (1-<em>x</em>)(Ba_1/3Sr_1/3Ca_1/3)TiO₃ (<em>x</em> = 0.2, 0.3, 0.4, 0.5, 0.6) were synthesized by the solid-phase method. The obtained solid solutions possess a cubic perovskite structure and show strong relaxor behaviour. The properties of the ceramics are characterized by the dielectric spectroscopy and Nyquist analysis.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 9700-9705"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593841","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":"Enhancing bulk MgB2 performance through optimized ball milling variables using Taguchi design approach","authors":"Malik Shadab,&nbsp;Muralidhar Miryala","doi":"10.1016/j.ceramint.2024.12.395","DOIUrl":"10.1016/j.ceramint.2024.12.395","url":null,"abstract":"<div><div>This research investigates the effects of high-energy ball milling parameters on the performance of bulk MgB₂, with a focus on enhancing its critical current density (<em>J</em>_<em>c</em>) for practical applications. By applying the Taguchi optimization method, key parameters such as revolutions per minute (RPM), ball-to-powder ratio (BPR), and milling time were optimized using an L₉ (3^3) orthogonal array. This approach significantly reduced the number of experimental trials while maintaining precision. Microstructural analysis via scanning electron microscopy (SEM) revealed progressive refinement under varying conditions, while X-ray diffraction (XRD) confirmed the successful formation of the primary MgB₂ phase. The refinement ensured a stable superconducting transition temperature (<em>T</em>_<em>c</em>) of 37.5 K. As a result of the optimization, an initial <em>J</em>_<em>c</em> of 379.3 kA/cm² at 20 K in a self-field was achieved. Further analysis using the main effects plot identified the optimal combination of parameters: 400 RPM, 3 h of milling time, and a 5:1 ball-to-powder ratio. This combination led to a notable improvement in <em>J</em>_<em>c</em>, reaching 398 kA/cm² at 20 K and 517 kA/cm² at 10 K. Additionally, flux pinning diagrams indicated a grain boundary pinning mechanism, as evidenced by the shift of peak positions toward a higher field ratio (b) of 0.2. The main effects plot, a graphical tool that displays the mean response for each level of a factor, was used to identify the optimal combination of parameters and visualize their impact on <em>J</em>_<em>c</em>. This analysis highlighted the parameters that most significantly influenced <em>J</em>_<em>c</em>, providing a clear understanding of their roles in the optimization process, further establishing MgB₂ as a promising candidate for various industrial applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 9647-9659"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593916","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":"Synthesis and annealing effects on microstructure and optical properties of wide-bandgap polycrystalline ferro-pseudobrookite FeTi2O5 sol-gel layers","authors":"Maria Cristina Ferrara ,&nbsp;Marco Montecchi ,&nbsp;Alberto Mittiga ,&nbsp;Monica Schioppa ,&nbsp;Saverio Mazzarelli ,&nbsp;Leander Tapfer ,&nbsp;Nico Lovergine ,&nbsp;Paola Prete","doi":"10.1016/j.ceramint.2024.12.397","DOIUrl":"10.1016/j.ceramint.2024.12.397","url":null,"abstract":"<div><div>Wide bandgap (WBG) and high thermal stability pseudobrookite compounds, Fe_1+xTi_2−xO₅ (0 ≤ x ≤ 1), are promising materials for photocatalysis, high-temperature thermoelectric applications, green production of hydrogen by water splitting, fabrication of power electronics, and optoelectronic devices. Here, we report on WBG, polycrystalline, ferropseudobrookite, FeTi₂O₅, coatings, stable at high temperature, prepared by an optimized sol-gel route on fused silica and silicon substrates. The chemical composition, the amorphous-to-crystalline phase transformation, and the influence of the annealing temperature and atmosphere (air and argon) on the formation and evolution of the crystalline phases were investigated in detail by combining thermogravimetric and differential scanning calorimetry analysis with Fourier-transform infrared spectroscopy and X-ray diffraction. The experimental results clearly show that orthorhombic FeTi₂O₅ single phase develops in the interval 500–560 °C (crystalline domain size about 16 nm at 560 °C). The coatings remain in a single FeTi₂O₅ phase up to a temperature of about 590 °C. At higher temperatures, a rutile-TiO₂ secondary phase is formed, both in an oxidizing and inert atmosphere, while the ferropseudobrookite phase remains unchanged. The results suggest that the secondary phase arises from the presence of superficial Ti-O- dangling bonds that at temperatures above 590 °C begin to arrange themselves to form polycrystalline rutile-TiO₂ (crystalline domain size ≈8 nm at 620 °C). The results also show that the average energy required to break the Ti-O-Ti molecular bonds of the FeTi₂O₅ phase increases with temperature, improving its thermal stability. Optical absorption spectroscopy measurements carried out on coatings heated at 560 °C, yield an optical bandgap of about 2.25 eV, a refractive index of about 1.84 at 550 nm, and a weak UVC positive band, peaked at about 5.9 eV, on transmittance that disappears when the samples are annealed at 750 °C.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 9669-9676"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of initial diamond particle size on the comprehensive mechanical properties of PDC","authors":"Xueqi Wang ,&nbsp;Jianbo Tu ,&nbsp;Baochang Liu","doi":"10.1016/j.ceramint.2024.12.476","DOIUrl":"10.1016/j.ceramint.2024.12.476","url":null,"abstract":"<div><div>Polycrystalline diamond compacts (PDCs) with eight different diamond particle sizes were prepared with the Cubic-Anvil Press under high pressure and high temperature (HPHT, 7.7 GPa and 1500 °C). By the microscopic characterization, there were significantly AGG phenomena in fine-grained PDCs (less than 4 μm), due to the high carbon solubility caused by particle size effect. The mechanical and thermal performance of the fabricated PDC samples were evaluated by hardness, abrasion, toughness and thermal expansion tests. The results showed that the finer of the initial diamond grain size, the higher of the abrasion resistance, and the coarser the size, the higher of the impact toughness. A variety of micro characterization analyses were carried out to understand the effect of diamond grain size on the performance of PDC. The diamond grain size played a more dominant role in the performance of PDCs than cobalt content. The thickness of cobalt transition layer and the difference of residual stress near the interface between polycrystalline diamond table and cemented carbide substrate were the main factors affecting the impact toughness of PDCs.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 8","pages":"Pages 10433-10442"},"PeriodicalIF":5.1,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594073","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}