Journal of the Australian Ceramic Society最新文献

{"title":"Enhanced electrocatalytic oxygen evolution reaction of network structured Polypyrrole-NaBiO2 nanocomposite in alkaline media","authors":"Munirah D. Albaqami,&nbsp;Muhammad Imran Anwar,&nbsp;Saikh Mohammad,&nbsp;Abdul Ghafoor Abid,&nbsp;Shahroz Saleem","doi":"10.1007/s41779-024-01132-5","DOIUrl":"10.1007/s41779-024-01132-5","url":null,"abstract":"<div><p>When it comes to the ability of the water splitting process to create hydrogen, the challenging dynamics of the water-oxidation reaction (WOR) provide a substantial impediment. So, in order to start both hydrogen and oxygen production during water electrolysis, efficient catalysts are needed. Herein, we report the development of NaBiO₂@PPy nanocomposite capable of oxygen evolution reactions (OER) in alkaline medium. The fabricated NaBiO₂@PPy nanocomposite and its individuals are characterized via various techniques to confirm the structural, elemental, textural, and morphological characteristics. This material produces a current density of 10 mA/cm² for oxygen evolution comparatively at low overpotentials of 227 mV and maintains its stability for up to 50 h. Furthermore, the fabricated NaBiO₂@PPy nanocomposite also shows less Tafel slope of 30.8 mV/dec. Therefore, this catalytic material would be a good option for creating a cost-effective, and environmentally friendly alkaline medium. In order to enhance the performance of water electrolysis, this work offers a revolutionary designed material and electrode fabrication method for future applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"685 - 697"},"PeriodicalIF":1.8,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilization of porcelain tile polished waste as an alternative raw material in wall tile bodies","authors":"Belgin Tanisan,&nbsp;Dilara Nur Guven","doi":"10.1007/s41779-024-01133-4","DOIUrl":"10.1007/s41779-024-01133-4","url":null,"abstract":"<div><p>The manufacturing of ceramic tiles generates waste at different stages of the production process. A significant part of these wastes has not been properly used yet; therefore, implementing their use in the production of ceramic tiles as an alternative raw material will help in preserving natural resources, reducing the cost of production, and hence producing an ecofriendly ceramic tile at lower cost. This study examines the feasibility of using polishing waste (PW) coming from the porcelain tile polishing step, as an inert filler agent in a wall tile body mix. Starting from a standard body mix (prepared with 18 wt% pegmatite), several modified body mixes were prepared by adding 6 wt%, 12 wt% and, 18 wt% PW instead of pegmatite. The tile specimens were obtained from compacted uniaxial pressing and fired in air at various temperatures (1100–1140 °C) using a laboratory-scale electric furnace. The technological properties of the fabricated samples, such as linear shrinkage, water absorption, flexural strength, and colour properties, were measured. It was found that the samples containing up to 12 wt% PW and fired at 1140 °C had similar firing shrinkage to the standard wall tile body. The addition of PW does not change the water absorption values but causes an increase in the flexural strength, reaching up to 19.6 MPa. A similar strength value could be obtained at about 20 °C lower firing temperature when 100% of the pegmatite was replaced by PW.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"1081 - 1087"},"PeriodicalIF":2.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of heat-treated silicon nitride additive parameters on flawless casting of AA7075 alloys: an alternative for conventional green sand","authors":"N. E. Edwin Paul,&nbsp;D. Jayabalakrishnan,&nbsp;V. Jayaseelan,&nbsp;K Saravanan","doi":"10.1007/s41779-024-01130-7","DOIUrl":"10.1007/s41779-024-01130-7","url":null,"abstract":"<div><p>This study involved the fabrication of AA7075 metal castings utilizing an environmentally sustainable manufacturing sand contains novel Si3N4 additives within a sand mold. The AA 7075 castings, free of flaws, were produced using sand molds created from millet husk ash and heat treated Si3N4, with the different ratios of sand, additive, and water meticulously calibrated. The findings yield the subsequent definitive conclusions. An efficient substitute for commercial sand in the casting industry is the production of Si3N4 ultrafine particles utilizing byproducts from finger millet. The incorporation of heat-treated Si3N4 improved both solidification and heat removal management. In all nine scenarios, the cast samples display medium grains indicates retained ductility. The A12B1C2 experimental pattern offers the most potential for enhanced results. The confirmation test indicated that the freshly delivered GRG possesses a value of around 0.71 for the predominant process variable (A3B2C2). A reduction in vacancy to 0.38 and a decrease in defect rating to 3.51 result in an increase of 4.44 in GRG.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"1059 - 1067"},"PeriodicalIF":2.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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, Characterization, and microwave Absorbing performance of Mg0.8Zn0.1Co0.1Fe2O4 /CTO nanocomposite in 8–18 GHz frequency range","authors":"Yusuf Sani,&nbsp;Raba’ah Syahidah Azis,&nbsp;Ismayadi Ismail,&nbsp;Yazid Yaakob,&nbsp;Nor Kamilah Binti saad","doi":"10.1007/s41779-024-01127-2","DOIUrl":"10.1007/s41779-024-01127-2","url":null,"abstract":"<div><p>In this research, we have presented a novel composite that is both low-cost and highly efficient. This composite is synthesized by combining Mg_0.8Zn_0.1Co_0.1Fe₂O₄ and Calcium Titanium Oxide (CTO) through a two-stage hydrothermal and coprecipitation process. The electromagnetic characteristics of the nanocomposites are effectively tuned by combining magnetic (MZCFe₂O₄) nanoferrite with dielectric (CTO) nanoparticles. XRD images showed that all prepared nanocomposites formed spinel structures without secondary phases. The findings of the structural and magnetic concepts and experimental investigations exhibit good agreement, confirming the accuracy of the cation distribution. The experimentally measured lattice parameter for MZCFe₂O₄ falls within the range of 8.3539–8.3874 Å, whereas the theoretical lattice parameter falls within the range of 8.3882–8.3833 Å. The mean crystal size was determined using the Debye–Scherrer technique, which was discovered to be between 53 and 75 nm, proving that all nanocomposites are nanocrystalline. The nanocomposite structure is shown in the FESEM micrographs, which show rocky-shaped particles with a range of hole sizes. All molecular elements are present, according to EDX bands. Mg_0.8Zn_0.1Co_0.1Fe₂O₄ /CTO (S3) nanocomposites exhibit a peak reflection loss (RL) value of -23.05 dB (99.50% absorption) at 11.4 GHz. This level of absorption is achieved with a material thickness of 2 mm and maintains effective absorption (RL ≤ 10 dB) across a bandwidth of 2.5 GHz, spanning from 11 to 13.5 GHz. The ternary composites created in this study demonstrate a significant enhancement in microwave absorption capabilities. This improved performance is credited to the innovative structural arrangement, featuring robust interfacial polarization, multiple reflections, impedance matching, and a beneficial synergistic interaction between Mg_0.8Zn_0.1Co_0.1Fe₂O₄ and CTO nanoparticles. This shows that S3 nanocomposite is a perfect candidate for high-efficiency microwave absorption. As a consequence, this method may be used to create a novel, highly effective microwave absorber.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"733 - 753"},"PeriodicalIF":1.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of contamination of saliva, blood, and their mixture on shear bond strength between tricalcium silicate-based bioceramic (Biodentine®) and resin-based dental composite","authors":"Kivanc Dulger,&nbsp;Gencaga Purcek","doi":"10.1007/s41779-024-01129-0","DOIUrl":"10.1007/s41779-024-01129-0","url":null,"abstract":"<div><p>The present study investigated the effect of different contaminations of saliva, blood, and a mixture of saliva and blood on the invitro shear bond strength between tricalcium silicate-based bioceramic and a resin-based dental composite material. Forty cylindrical acrylic molds with the diameter of 30 mm and height of 13 mm were prepared. Then, a hole with an inner diameter of 5 mm and depth of 3 mm was formed by machining the center of each acrylic mold and filled with Biodentine. Forty specimens were randomized and allocated into four groups (<i>n</i> = 10) as control, saliva, blood, and saliva + blood. A resin-based dental composite material was bonded to contamination-free (control group) and contaminated surfaces of Biodentine using a universal adhesive. Shear bond strength tests were conducted using a universal testing machine (Instron 3382, Canton, MA, USA). The failure modes of debonded sample surfaces were identified using stereo-microscope. Scanning electron microscope images of the selected samples were also analyzed to identify the failure modes and fracture mechanisms in detail. Data were analyzed using IBM SPSS v23. A statistically significant difference was observed among the median values of the shear bond strength of the groups (<i>p</i> &lt; 0.006). The control group had the highest mean shear bond strength value. Although the control group was statistically similar to the saliva group, it differed from the blood and saliva + blood groups. All groups, except the control, showed statistically similar shear bond strength values. While the control group without any contaminant exhibited a mostly cohesive failure mode (60%), the groups contaminated with saliva, blood, and saliva + blood generally exhibited an adhesive failure mode (%50). The control group showed the highest median shear bond strength value among the groups, which means that any contamination of Biodentine with saliva, blood, or the mixture of saliva and blood decreased statistically and considerably shear bond strength between tricalcium silicate-based bioceramic and resin-based dental composite.</p><p>\u0000 <b>Ethical Registration Approval Number</b>: Number 64529847/30 and protocol code 2024/27</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"603 - 614"},"PeriodicalIF":1.8,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 effect of synthesis parameters on the adsorption capacity of Cu+2 ions of mullite containing polymer composites","authors":"Salar Moradi,&nbsp;Sahar Mollazadeh Beidokhti,&nbsp;Jalil Vahdati Khaki,&nbsp;Morteza S. Hosseini,&nbsp;Alireza Kiani Rashid","doi":"10.1007/s41779-024-01125-4","DOIUrl":"10.1007/s41779-024-01125-4","url":null,"abstract":"<div><p>This study aims to synthesize mullite powders using the sol-gel method and explore their potential for water purification and removing copper ion contaminants. The effects of synthesis temperature, pH value, and solvent type on the samples’ specific surface area and microstructural properties were thoroughly examined. The impact of different solvents, including aqueous and aqueous-polymeric solvents, was also investigated. Subsequently, the adsorption properties of the PVA membranes containing synthesized materials as adsorbents in a solution containing copper ions were investigated. According to XRD results, samples treated under acidic conditions in the presence of polyethylene glycol as solvent demonstrated crystallization of 100% of the mullite phase at lower temperatures (1350 °C) which is higher than that of samples synthesized at basic conditions or in aquas media. BET results and SEM images of the thermally treated samples at 1350 and 1550 °C revealed that the acid-treated samples, PW0 and W0, exhibited more porous and uneven surfaces than the basic-treated samples, PW13 and W13. According to BET and PSA results, synthesized samples at acidic conditions in a polymeric substrate demonstrated a higher specific surface area (11 m³/g) and smaller particle size (0.4 μm) in comparison to samples synthesized in the basic and/or aqueous substrate conditions. These characteristics enhance the adsorption capacity of the synthesized materials in this series. Moreover, ICP results indicated that the PW0-1550–1 h sample exhibited the highest adsorption capacity. Under the conditions using 0.06 g of this adsorbent, the adsorption rate was 58%, and increasing the adsorbent amount to 0.12 g resulted in a 70% adsorption rate.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 3","pages":"1041 - 1058"},"PeriodicalIF":2.1,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An environment friendly method for synthesizing ternary composite comprising water hyacinth (Eichhornia crassipes) fiber, nickel ferrite, and polyaniline: potential electromagnetic interference and good dielectric performance","authors":"Shine R. Chandran,&nbsp;Raji. R. Krishnan,&nbsp;Elizabath Johnson,&nbsp;K. H. Prema","doi":"10.1007/s41779-024-01128-1","DOIUrl":"10.1007/s41779-024-01128-1","url":null,"abstract":"<div><p>Fabrication of lightweight conductive composites for high-performance X-band electromagnetic-interference (EMI) shielding material continues to be a formidable technical problem despite of enormous efforts. An effective and creative method for synthesizing a composite of water hyacinth fiber with nickel ferrite and PANI is proposed in this study. The synthesis is carried out via in-situ chemical oxidative polymerization using freshly prepared lime juice as green media. The structural characterizations of the prepared composites are carried out using XRD and FTIR analysis and the formation of the composite is confirmed. Morphological studies are done by SEM and elemental detection by SEM mapping. The thermal stability of the composites is studied by TGA. By analysing DC conductivity, AC conductivity and dielectric characteristics, the performance of the synthesized samples is comprehended. The ternary composite exhibits excellent conductivity in 10^− 3 Scm^− 1 range. The polaron/bi-polaron interaction paradigm can be used to explain the superior conductivity performance of the ternary composite. Using a vector network analyser, experiments on electromagnetic interference (EMI) shielding are carried out in the frequency range of 8.2 to 12.4 GHz. The material exhibits an outstanding shielding response showing 20 dB for fiber-ferrite binary composite and 26.6 dB for fiber-ferrite-PANI ternary composite. It is analysed that, the composites are easy to develop, more stable and less hazardous to the environment, and can be used as useful shielding materials.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>The graphical representation explains the formation of binary and ternary composites and their applications</p></div></div></figure></div></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"581 - 601"},"PeriodicalIF":1.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical properties, gamma attenuation and fast neutrons moderating performance of V2O5–Bi2O3–B2O3–PbO glasses","authors":"Norah Alomayrah,&nbsp;M. S. Al-Buriahi","doi":"10.1007/s41779-024-01122-7","DOIUrl":"10.1007/s41779-024-01122-7","url":null,"abstract":"<div><p>This study investigated a new glass system containing various oxides, namely, V₂O₅, Bi₂O₃, B₂O₃, and PbO, with the aim of understanding their optical properties, gamma attenuation characteristics, and fast neutron moderation abilities. The optical properties were assessed through the refractive index and other parameters such as the reflectance loss (R^loss), optical transmittance (T^opt), molar polarizability, molar refractivity, metallization criterion (M), and static dielectric constant. Moreover, through a comprehensive theoretical analysis, the radiation shielding performance of the glass system was determined by computing their gamma and neutron attenuation factors. The PHITS Monte Carlo simulation code and the XCOM program were used to calculate the gamma radiation interaction parameters, while standard theoretical models were adopted for the estimation of neutron cross-sections. It was deduced from the obtained results that, as PbO concentration increased at the expense of V₂O₅, R^loss decreased. Also, T^opt increased with values of 0.6081, 0.6265, and 0.6514 for VBBP1, VBBP2, and VBBP3, respectively. The lowest half value layer (HVL) was observed at the lowest energy for the VBBP3 sample containing the highest PbO content. The synergistic effects arising from the combination of the various oxides offer unique opportunities for tailoring the optical and shielding attributes of the studied glasses to meet the demands of diverse optical, radiation shielding, and technological applications.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"517 - 527"},"PeriodicalIF":1.8,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 effect of binder component and oxygen partial pressure on the high-temperature oxidation behaviors of WC cemented carbides","authors":"Xingdong Su,&nbsp;Chengxin Li,&nbsp;Feng Liu,&nbsp;Minghui Li,&nbsp;Ruoyu Chen,&nbsp;Yulong Li,&nbsp;Danfeng Jiang,&nbsp;Zheng Kang","doi":"10.1007/s41779-024-01107-6","DOIUrl":"10.1007/s41779-024-01107-6","url":null,"abstract":"<div><p>The oxidation of the WC cemented carbides result in the formation of oxide phases, pores and cracks, ultimately reducing the performance and lifespan of the cemented carbide. Therefore, it is essential to study the oxidation behavior and mechanism of cemented carbide to improve its oxidation resistance and prolong its lifespan. The oxidation rate of cemented carbides is significantly affected by the components of the binder and oxygen partial pressures. When Ni and Zr are used as binders in preparing WC cemented carbides, improved oxidation resistance is attained because of the formation of a dense oxide layer on the cemented carbide surface under high oxygen partial pressures. When using 5% Ni &amp; 15% Zr as the WC binder and oxidizing at 800 °C for 1 h, the oxidation rate reaches its peak at an oxygen partial pressure of 0.21, with an oxide layer thickness of 721 μm. Beyond this point, the oxidation rate decreases as the oxygen partial pressure increases. In contrast, using Fe and Zr as binders leads to an increase in surface flaws as the oxygen partial pressure increases. When using 10% Fe &amp; 5% Zr as the WC binder and oxidizing at 800 °C for 1 h, the oxidation rate rises with increasing oxygen partial pressure, although the rate of increase progressively diminishes. Therefore, adjusting the binder components is an effective method for enhancing the oxidation resistance of WC cemented carbides.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"409 - 418"},"PeriodicalIF":1.8,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From waste to resource: energy-efficient production of glass-ceramic using blast furnace slag","authors":"Majid Bagheri","doi":"10.1007/s41779-024-01123-6","DOIUrl":"10.1007/s41779-024-01123-6","url":null,"abstract":"<div><p>The research successfully demonstrated the viability of producing high-quality glass-ceramics using blast furnace slag (BFS) through the petrurgic method compared with other energy-intensive methods. The findings revealed that this method not only reduces energy consumption but also effectively utilizes waste materials to form products with superior properties. The resultant glass-ceramic exhibited outstanding hardness and low water absorption, indicative of its dense and well-crystallized structure. However, its acid resistance was somewhat lower compared to its alkali resistance, which could be attributed to the chemical stability of the cuspidine phase in different environmental conditions. Future studies could explore further optimization of the material composition and processing conditions to enhance its acid resistance, potentially expanding the applications of these sustainable materials in various industrial sectors. This study underscores the potential of BFS as a valuable resource for the production of high-performance glass-ceramics, contributing to waste minimization and resource efficiency in the steel and ceramics industries.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"61 2","pages":"529 - 539"},"PeriodicalIF":1.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}