Open Ceramics最新文献_第7页

Boosting the optical, physical, and gamma-ray attenuation capabilities of barium borate glasses through the addition of Y2O3 and PbO2 通过添加Y2O3和PbO2提高硼酸钡玻璃的光学、物理和伽马射线衰减能力

IF 2.9

Open Ceramics Pub Date : 2025-01-08 DOI: 10.1016/j.oceram.2025.100736

K.A. Mahmoud , M.I. Sayyed , Shrikant Biradar , Yasser Maghrbi

{"title":"Boosting the optical, physical, and gamma-ray attenuation capabilities of barium borate glasses through the addition of Y2O3 and PbO2","authors":"K.A. Mahmoud , M.I. Sayyed , Shrikant Biradar , Yasser Maghrbi","doi":"10.1016/j.oceram.2025.100736","DOIUrl":"10.1016/j.oceram.2025.100736","url":null,"abstract":"<div><div>The objective of the current study is to develop a new glass series for hybrid uses in optical and γ-ray protective applications. The mentioned glass series is composed of high-purity oxides according to the chemical formula of (10+<em>x</em>)PbO<sub>2</sub>+23BaO+10CaO+(55-x)B<sub>2</sub>O<sub>3</sub>+2Y<sub>2</sub>O<sub>3</sub>; <em>x</em> = 0, 3, 6, and 9 mol% under a melting temperature of 1100 °C. The impact of PbO<sub>2</sub> on the optical properties of the prepared glasses was examined using the T-7200 UV–Vis spectrophotometer. The increase in PbO<sub>2</sub> concentration throughout 10–19 mol% decreases the band gap within the glasses over the ranges of 2.945–2.684 eV (for direct transition) and 2.546–1.975 eV (for indirect transition). Additionally, the refractive index of the prepared glasses increased from 2.531 to 2.747 when the PbO<sub>2</sub> concentration raised within the prepared glasses throughout 10–19 mol%. The radiation shielding ability for prepared glasses was evaluated over the energy interval of 0.015–15 MeV using the Monte Carlo simulation. An increase in PbO<sub>2</sub> concentration throughout 10–19 mol% raises the linear attenuation coefficient (LAC) of prepared glasses over the ranges of 178.961–255.807 cm<sup>–1</sup> (0.015 MeV), 0.304–0.354 cm<sup>–1</sup> (0.8 MeV), and 0.137–0.168 cm<sup>–1</sup> (10 MeV), respectively. The LAC enhancement reduced the thickness equivalent lead, the transmission factor of the prepared glass samples.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100736"},"PeriodicalIF":2.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the structure and magnetic behaviour of cobalt phase in polycrystalline diamond compacts 聚晶金刚石致密物中钴相的结构和磁性分析

IF 2.9

Open Ceramics Pub Date : 2025-01-07 DOI: 10.1016/j.oceram.2025.100734

T.T. Ngwekhulu , D.J. Whitefield , I. Sigalas , H.S.L. Sithebe , S.R. Naidoo

{"title":"Analysis of the structure and magnetic behaviour of cobalt phase in polycrystalline diamond compacts","authors":"T.T. Ngwekhulu , D.J. Whitefield , I. Sigalas , H.S.L. Sithebe , S.R. Naidoo","doi":"10.1016/j.oceram.2025.100734","DOIUrl":"10.1016/j.oceram.2025.100734","url":null,"abstract":"<div><div>Three variants of Polycrystalline Diamond (PCD) cutters were manufactured by High Pressure and High Temperature (HPHT) with varying diamond grain sizes ranging from 4 to 25 μm with a Tungsten Carbide (WC<img>Co) substrate base. The structure and magnetic profiles of the PCD tables were analysed using KOERZIMAT 1.097 MS, Scanning Electron Microscopy (SEM), Image Analysis (IA), and Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES). The study revealed that the size of the PCD table specimen does not impact the magnetic saturation. A relationship was observed between the amount of metal phase and the magnetic saturation level and the cobalt mean-free path and coercivity were found to be correlated. The PCD layers separated from the substrates revealed that larger diamond compact grain sizes decrease metallic cobalt phase magnetic domains. However, this also leads to a decrease in coercivity due to a decrease in cobalt content. In addition, it is worth noting that the dissolved tungsten (W) remained constant in all three variants. This indicates that the diamond grain size and the presence of the cobalt phase did not impact the amount of dissolved W during the synthesis process. The starting fine grain size (average of 4 μm) led to a magnetic saturation value of 15.56 % after sintering, medium grain size (average of 13 μm) with a saturation value of 13.88 %) while the coarse grain size (average of 25 μm) resulted in a magnetic saturation value of 11.86 %. The observed phenomena can be explained by the increased size of the diamond grains, which leads to a decrease in the cobalt concentration.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100734"},"PeriodicalIF":2.9,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zinc oxides by thermal decomposition synthesis and parameters affecting electrocatalyst activity for CO2 reduction reaction 氧化锌的热分解合成及其参数对CO2还原反应电催化剂活性的影响

IF 2.9

Open Ceramics Pub Date : 2024-12-28 DOI: 10.1016/j.oceram.2024.100733

Elías Rodríguez-Jara , Margherita Cavallo , Ryosuke Nakazato , Matthias Quintelier , Keeko Matsumoto , Joke Hadermann , Jadra Mosa , Francesca Bonino , Kiyoharu Tadanaga , Mario Aparicio , Nataly Carolina Rosero-Navarro

{"title":"Zinc oxides by thermal decomposition synthesis and parameters affecting electrocatalyst activity for CO2 reduction reaction","authors":"Elías Rodríguez-Jara , Margherita Cavallo , Ryosuke Nakazato , Matthias Quintelier , Keeko Matsumoto , Joke Hadermann , Jadra Mosa , Francesca Bonino , Kiyoharu Tadanaga , Mario Aparicio , Nataly Carolina Rosero-Navarro","doi":"10.1016/j.oceram.2024.100733","DOIUrl":"10.1016/j.oceram.2024.100733","url":null,"abstract":"<div><div>Electroreduction of CO<sub>2</sub> to obtain fossil fuel-free energy products is a promising avenue reducing anthropogenic greenhouse gas emissions. Catalysts based on Au, Ag and Cu are frequently used. Others based on abundant and low-cost elements such as Zn also report catalytic activity. This work presents a scalable and simple synthesis method of catalysts based on ZnO structures by a controlled thermal decomposition process of Zinc acetate dehydrate. An in-depth study of how modifications of synthesis parameters may affect the final performance of the material as electrocatalyst in CO<sub>2</sub>RR is studied. It has been found that higher values of faradaic efficiency to CO evolution were found for samples synthesised at higher temperatures and higher heating ramp, reaching 69 % at -0.8 V vs RHE. It is of great importance to control over the parameters of the thermal decomposition process as they can greatly affect the final catalytic behaviour of the sample.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100733"},"PeriodicalIF":2.9,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PSZB glass as a shielding material: Evaluating physical, mechanical, and gamma ray shielding performance 作为屏蔽材料的PSZB玻璃：评估物理、机械和伽马射线屏蔽性能

IF 2.9

Open Ceramics Pub Date : 2024-12-20 DOI: 10.1016/j.oceram.2024.100729

M.I. Sayyed , Chaitali V. More , Ashok Kumar , Yasser Maghrbi

{"title":"PSZB glass as a shielding material: Evaluating physical, mechanical, and gamma ray shielding performance","authors":"M.I. Sayyed , Chaitali V. More , Ashok Kumar , Yasser Maghrbi","doi":"10.1016/j.oceram.2024.100729","DOIUrl":"10.1016/j.oceram.2024.100729","url":null,"abstract":"<div><div>The PbO-SrO-ZnO-B<sub>2</sub>O<sub>3</sub> (PSZB) glasses were synthesized through the melt-quenching. The introduction of larger-sized PbO into the glass matrix led to structural alterations, elucidated by a marginal elevation in density and molar volume values from 4.292 g/cm<sup>3</sup> to 4.922 g/cm<sup>3</sup> and 29.812 cm<sup>3</sup> mol<sup>−1</sup> to 30.676 cm<sup>3</sup> mol<sup>−1</sup> respectively. The expansion of the network was found to contribute to the rise in oxygen molar volume (V<sub>o</sub>) from 15.691 to 19.173 cm<sup>3</sup> mol<sup>−1</sup>. Phy-X software was used to compute the shielding characteristics theoretically in the energy range of 0.015–15 MeV. The mass attenuation coefficients (MAC), half value layer (HVL) and mean free path (MFP) have been tested against photon energy. The radiation shielding capabilities increased with increasing PbO content. The present glasses' HVL are compared to that of different tellurite glasses at 0.1 and 0.15 MeV. PSZB4 glass with greater PbO content (50 mol%) has shown outstanding gamma radiation shielding properties than its counterparts.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100729"},"PeriodicalIF":2.9,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143160266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The latest research progress on MnZn ferrite and their applications 锰锌铁氧体及其应用的最新研究进展

IF 2.9

Open Ceramics Pub Date : 2024-12-19 DOI: 10.1016/j.oceram.2024.100732

Zhexue Chen , Teng Li , Anping Wang , Minxia Shi , Bangcheng Han

引用次数: 0

Functionalization of LCD glass for the manufacturing of advanced 3D-printed translucent photocatalytic scaffolds 用于制造先进3d打印半透明光催化支架的LCD玻璃功能化

IF 2.9

Open Ceramics Pub Date : 2024-12-16 DOI: 10.1016/j.oceram.2024.100731

Elena Colusso , Hamada Elsayed , Paulina Ożóg , Jozef Kraxner , Dusan Galusek , Enrico Bernardo

引用次数: 0

Tailoring optical properties of (Ce,Pr)O2-δ·(La,Sm,Y)2O3 high entropy oxides by substituting Pr with Gd or Dy for multi-wavelength emission applications 在多波长发射应用中，用Gd或Dy取代Pr，调整（Ce,Pr）O2-δ·（La,Sm，Y）2O3高熵氧化物的光学性质

IF 2.9

Open Ceramics Pub Date : 2024-12-14 DOI: 10.1016/j.oceram.2024.100730

Avnee Chauhan , Enrico Bernardo , Dušan Galusek

{"title":"Tailoring optical properties of (Ce,Pr)O2-δ·(La,Sm,Y)2O3 high entropy oxides by substituting Pr with Gd or Dy for multi-wavelength emission applications","authors":"Avnee Chauhan , Enrico Bernardo , Dušan Galusek","doi":"10.1016/j.oceram.2024.100730","DOIUrl":"10.1016/j.oceram.2024.100730","url":null,"abstract":"<div><div>High-entropy oxides (HEOs) has generated considerable research interest because of their novel inherent properties and tuneable functionality. In this study, reactive sintering method was used to synthesize HEOs with three different compositions (Ce,RE)O<sub>2-δ</sub><strong>·</strong>(La,Sm,Y)<sub>2</sub>O<sub>3</sub> [RE=Pr], and CeO<sub>2-δ</sub><strong>·</strong>(RE,La,Sm,Y)<sub>2</sub>O<sub>3</sub> [RE=Gd,Dy]. Replacement of Pr cation with Gd or Dy in the synthesized compositions significantly increased the band gap value from 1.8 eV to 3.13 eV and 3.18 eV respectively. The broader band gap improved luminescent properties of bulk ceramic samples. Strong emissions originating from Ce<sup>3+</sup>, Dy<sup>3+</sup>and Sm<sup>3+</sup> in Dy-containing HEO and from Ce<sup>3+</sup>, Gd<sup>3+</sup> and Sm<sup>3+</sup>in Gd- containing HEO were observed at multiple wavelengths through entire visible region. Under multi-wavelength excitation, effective regulation of the emission colour was achieved, resulting in enhanced photoluminescence performance. The prepared HEOs, CeO<sub>2-δ</sub><strong>·</strong>(RE,La,Sm,Y)<sub>2</sub>O<sub>3</sub> [RE=Gd,Dy] can be considered as a novel materials for white light application (WLED) with excitation at multiple wavelengths and tuneable emission.</div></div>","PeriodicalId":34140,"journal":{"name":"Open Ceramics","volume":"21 ","pages":"Article 100730"},"PeriodicalIF":2.9,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143159385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of annealing temperature on the photocatalytic efficiency of sol-gel dip-coated ZnO thin films in methyl orange degradation 退火温度对溶胶-凝胶浸渍ZnO薄膜光催化降解甲基橙效率的影响

IF 2.9

Open Ceramics Pub Date : 2024-12-13 DOI: 10.1016/j.oceram.2024.100727

A.H. Haritha , M.E. Cruz , O. Sisman , A. Duran , D. Galusek , J.J. Velázquez , Y. Castro

引用次数: 0

Influence of the binder composition on the water debinding properties of a PVB-PEG-alumina feedstock for the fused deposition of ceramic process 粘结剂组成对熔融沉积陶瓷用pvb - peg -氧化铝原料水脱粘性能的影响

IF 2.9

Open Ceramics Pub Date : 2024-12-11 DOI: 10.1016/j.oceram.2024.100728

Thomas Heim , Frank Kern , Cristina Siligardi

引用次数: 0

Colors on fire: reconstructing the change of color hues in firing of experimental briquettes 燃烧时的颜色：重建实验型煤燃烧时颜色的变化