Transactions of the Indian Ceramic Society最新文献_第7页

Green Properties of Dry Pressed Alumina Compact Prepared Using Aloe Vera Gel and Sucrose as a Binder 以芦荟凝胶和蔗糖为粘结剂制备的干压氧化铝致密体的绿色性能

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2022-01-02 DOI: 10.1080/0371750X.2022.2032359

Jyoti, V. Pandey, M. Yadav, K. Mohanta, V. Singh

{"title":"Green Properties of Dry Pressed Alumina Compact Prepared Using Aloe Vera Gel and Sucrose as a Binder","authors":"Jyoti, V. Pandey, M. Yadav, K. Mohanta, V. Singh","doi":"10.1080/0371750X.2022.2032359","DOIUrl":"https://doi.org/10.1080/0371750X.2022.2032359","url":null,"abstract":"The present study is focused on the scope of aloe vera (AV) gel and sucrose as a binder to prepare green ceramic compact samples through dry pressing. The alumina compacts having 0-14 wt% (0-2.8 wt% on dry basis) AV gel and 0-2 wt% sucrose binder have been prepared as a function of moisture content at optimum compaction pressure. The green properties of the resulting samples have been characterized through SEM, FTIR, etc and compared with other binders. Primary results revealed that alumina compact with an optimum binder content attained maximum green density and flexural strength. The maximum green density and maximum green flexural strength are 64% and 13.5 Mpa, respectively. The experimental results have also been correlated with the microstructure of green compacts. Dry pressed compacts are sufficiently strong for green machining. The strength of binder-based green ceramic samples has been attributed to better particle packing due to adsorbing and plasticizing properties of AV gel and sucrose binder, as revealed by IR analysis. The sintered properties of fired samples at 1600°C have exhibited minimum (2.3%) porosity. Therefore, the current study creates a scope of AV gel and sucrose as a binder for the green processing of alumina based compacts. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42465985","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}

引用次数: 0

Thermal Conductivity and Flexural Strength of Two-Step Hot-Pressed SiC Ceramics 两步热压SiC陶瓷的热导率和弯曲强度

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2022-01-02 DOI: 10.1080/0371750X.2022.2038672

Jingren Li, Wen‐Zhong Lu, Hai Jiang

{"title":"Thermal Conductivity and Flexural Strength of Two-Step Hot-Pressed SiC Ceramics","authors":"Jingren Li, Wen‐Zhong Lu, Hai Jiang","doi":"10.1080/0371750X.2022.2038672","DOIUrl":"https://doi.org/10.1080/0371750X.2022.2038672","url":null,"abstract":"Effects of two-step hot-pressing on microstructure, thermal conductivity and flexural strength of silicon carbide (SiC) ceramics were investigated. A novel combination of aluminium nitride (AlN), La2O3 and LaF3 was employed as sinter additives in this study. SiC ceramics prepared through both one-step (OS samples) and two-step (TS samples) hot-pressing method exhibited high relative densities. Compared with OS samples, the TS samples yielded finer microstructures with both higher thermal conductivities and flexural strengths. Impedance spectroscopy analysis was employed to reinforce the investigation on thermal conductivity variations in different samples. According to the analysis results, TS samples exhibited higher fitting grain and grain boundary resistances, which stood for a lower concentration of vacancies, indicating that two-step hot-pressing is more beneficial to the elimination of defects and improvement of thermal conductivity in SiC ceramics. On the other hand, TS samples were strengthened by a combined effect of finer microstructure and formation of SiC-AlN solid solution, thereby obtained higher flexural strengths. Hence, the present study suggests that two-step hot-pressing is more favorable to the improvement of both thermal conductivity and flexural strength of SiC ceramics with AlN-La2O3-LaF3 additive combinations. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43428916","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}

引用次数: 0

The Formation of a New Phase during Crystallization of TiO2-Doped Nd2O3-Al2O3-SiO2 Glasses TiO2掺杂Nd2O3-Al2O3-SiO2玻璃晶化过程中新相的形成

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2022-01-02 DOI: 10.1080/0371750X.2022.2044382

S. Baghshahi, C. Sorrell, M. Brungs, H. Kim

引用次数: 0

Low-Cost Combustion Synthesis, Spectroscopic and Optoelectronic Analysis of Novel Ba2YAlO5:Er3+ Nanomaterials for Competent Illumination Applications 新型Ba2YAlO5:Er3+纳米材料的低成本燃烧合成、光谱和光电分析

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2021-10-02 DOI: 10.1080/0371750X.2021.2004238

P. Sehrawat, R. Malik, R. Punia, M. Sheoran, Manisha Bedi, Hina Dalal

{"title":"Low-Cost Combustion Synthesis, Spectroscopic and Optoelectronic Analysis of Novel Ba2YAlO5:Er3+ Nanomaterials for Competent Illumination Applications","authors":"P. Sehrawat, R. Malik, R. Punia, M. Sheoran, Manisha Bedi, Hina Dalal","doi":"10.1080/0371750X.2021.2004238","DOIUrl":"https://doi.org/10.1080/0371750X.2021.2004238","url":null,"abstract":"In the current prospective study, novel monoclinic symmetry type Ba2YAlO5:Er3+ nanocrystals with an emanation of vivid greenish light have been manufactured via an ideal, economical and ecological propellant combustion approach. Topographical investigations disclose roughly spherical agglomerated particles of nano-conduct (40-65 nm). Optimized content of the activator (Er3+) has been determined as x = 0.03, after the exigency of luminance quenching directed by the dipole-dipole kind interactions among the nearest Er3+ ions. The nanocrystals report an intense peak at 549 nm as per 4S3/2→4I15/2 characteristics transition, excited by 379 nm wavelength, hence proclaims glowing green luminescence. Decay lifetimes of target samples have been found to decline from 3.4556±0.0552 to 1.3063±0.0187 ms, with escalating Er3+ content. Excellent luminescent profile is reflected in terms of colour parameters like green colour coordinates (0.2630, 0.6205) and 90.79% colour purity, which have been contiguous to standard TV, SD colour green coordinates (0.300, 0.600), European Broadcasting Union (EBU, 0.290, 0.600) and NICHIA LED ( NCSGE17A) green coordinates (0.252, 0. 651). Hence, the overview of present research results insinuate their optimistic candidacy for advanced illuminating appliances like white light-emitting diodes (WLEDs) and other lighting applications. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45100173","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}

引用次数: 1

Effect of Reaction Time on the Synthesis and Sintering of Magnesium-Aluminium Spinel by Microwave Hydrothermal Synthesis 反应时间对微波水热合成镁铝尖晶石及其烧结的影响

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2021-10-02 DOI: 10.1080/0371750X.2021.2014637

Runping Li, Jianhua Liu

引用次数: 1

A Preparative Approach of TiO2-ZrO2 Coating Using Aquo-Based TiO2 Precursor Useful for Light Reflective Application 一种应用于光反射应用的Aquo基TiO2前驱体制备TiO2-ZrO2涂层的方法

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2021-10-02 DOI: 10.1080/0371750X.2021.2004237

S. Bhattacharyya, S. K. Medda, M. Naskar

{"title":"A Preparative Approach of TiO2-ZrO2 Coating Using Aquo-Based TiO2 Precursor Useful for Light Reflective Application","authors":"S. Bhattacharyya, S. K. Medda, M. Naskar","doi":"10.1080/0371750X.2021.2004237","DOIUrl":"https://doi.org/10.1080/0371750X.2021.2004237","url":null,"abstract":"TiO2-ZrO2 composite coating was prepared onto glass substrate via sol-gel dip-coating technique using aquo-based titanium(IV) oxysulphate (TOS) and zirconium(IV) n-propoxide (ZP) as the precursor sources of TiO2 and ZrO2, respectively followed by calcination at 500oC/1 h. The samples were characterized by FTIR, Raman, UV/visible/ NIR, GIXRD, FESEM, TEM and XPS studies. The thickness and RI of the coating were measured ellipsometrically. The coated glasses with coating thicknesses of 110±10 nm having refractive index of 1.95±0.05 were found to be uniform with good hardness (≥3H) and adhesion properties. The bonding nature of Ti-O and Zr-O was confirmed by FTIR and XPS analyses while Raman and GIXRD studies revealed the crystalline nature of TiO2-ZrO2 composite. FESEM and TEM images revealed crack-free and spider web-like nature of the deposited coating, respectively. The coated TiO2-ZrO2 composite showed >20% of average reflection within wavelength range of 350-2500 nm. The above nanocomposite based coated glass could be used as heat reflecting window for efficient energy saving building components. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46887475","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}

引用次数: 1

A Novel Mg-Al-Co LDH/ MAO Composite Films on LA103Z Magnesium-Lithium Alloy and Its Active Anti-corrosion Performance LA103Z镁锂合金表面新型Mg-Al-Co-LDH/MAO复合膜及其主动防腐性能

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2021-10-02 DOI: 10.1080/0371750X.2021.2004239

Ju‐mei Zhang, Kai Wang, X. Duan, An‐rong Hou, Jia‐cheng Li, Hui Cai, Zhihu Wang

{"title":"A Novel Mg-Al-Co LDH/ MAO Composite Films on LA103Z Magnesium-Lithium Alloy and Its Active Anti-corrosion Performance","authors":"Ju‐mei Zhang, Kai Wang, X. Duan, An‐rong Hou, Jia‐cheng Li, Hui Cai, Zhihu Wang","doi":"10.1080/0371750X.2021.2004239","DOIUrl":"https://doi.org/10.1080/0371750X.2021.2004239","url":null,"abstract":"In order to further improve the corrosion resistance of the micro-arc oxidization (MAO) film on LA103Z magnesium-lithium alloy, a Mg-Al-Co layered double hydroxide (LDH) film was fabricated on MAO film by an in-situ hydrothermal method. The results showed that with the extension of hydrothermal treatment time, the dense LDH film sealed the micro-pores and cracks in the MAO film successfully. In addition, LDH film treated with a hydrothermal treatment at 90°C for 24 h has the best electrical insulation. The hydrogen evolution rates (mL.cm–2.h−1) of the LDH/MAO composite films rank as LDH/MAO-24 h ≈ LDH/MAO-30 h (0.12) < LDH/MAO-18 h (0.15) < LDH/MAO-12 h (0.16) < MAO (0.25). Meanwhile, the results of potentiodynamic polarization curves showed that the corrosion potential of LDH/MAO-24 h film increased from –1.5349 to −1.388 V, and the corrosion current density decreased by three orders of magnitude. Therefore, the LDH/MAO film has better corrosion resistance than a single MAO film and adds long-term corrosion resistance to the magnesium alloy, which owes to the sealing effect of LDH on inherent defects and trapping effect on corrosion ions. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49080623","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}

引用次数: 2

Impact of Experimental Protocols on the Flexural Strength Testing of Lithium Disilicate-Based Dental Glass-Ceramics 实验方案对二硅酸锂基牙科玻璃陶瓷抗弯强度测试的影响

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2021-10-02 DOI: 10.1080/0371750X.2021.2004443

Xinyi Xu, J. Young, A. Goel

{"title":"Impact of Experimental Protocols on the Flexural Strength Testing of Lithium Disilicate-Based Dental Glass-Ceramics","authors":"Xinyi Xu, J. Young, A. Goel","doi":"10.1080/0371750X.2021.2004443","DOIUrl":"https://doi.org/10.1080/0371750X.2021.2004443","url":null,"abstract":"The transition of dental ceramics and glass-ceramics (for fixed all-ceramics and metal-ceramics restorations and prostheses) from laboratory to clinic requires the materials to pass through a series of tests following the protocols and requirements discussed in the standard ISO 6872:2015. However, the literature reveals that the researchers in the dental ceramics community usually do not adhere to the ISO standard’s specifications when measuring their materials’ flexural strength, assuming that these deviations from the protocols exhibit minimal or no impact on the materials’ strength. Therefore, the present study aims to fill that gap by elucidating the impact of the following experimental protocols – (i) polishing, (ii) edge chamfering and (iii) adhesive tape on the non-tensile side – on three-point flexural strength of lithium disilicate based glass-ceramics. The result reveals that polishing increases flexural strength and tends to introduce edge or corner flaws in the specimen. Though edge chamfering of specimens did not help remove the edge defects in our study, it leads to a tighter flaw distribution, increasing the reliability of the flexural strength results. The application of adhesive tape (on the compressive side) exhibits an insignificant impact on the glass-ceramic specimens’ flexural strength. Accordingly, revisions have been suggested in the ISO 6872 standard. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43279215","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}

引用次数: 0

Effect of K2O:Al2O3 Ratio on Crystallization Phenomena and Microstructure of Lithium Silicate Glass-Ceramics K2O:Al2O3配比对硅酸锂微晶玻璃结晶现象及微观结构的影响

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2021-10-02 DOI: 10.1080/0371750X.2021.2001693

Santa Kolay, P. Bhargava

{"title":"Effect of K2O:Al2O3 Ratio on Crystallization Phenomena and Microstructure of Lithium Silicate Glass-Ceramics","authors":"Santa Kolay, P. Bhargava","doi":"10.1080/0371750X.2021.2001693","DOIUrl":"https://doi.org/10.1080/0371750X.2021.2001693","url":null,"abstract":"K2O plays an important role as glass modifier in glass systems. In the present study,the effect of K2O:Al2O3 ratio on crystallization and microstructural evolution in Li2O-SiO2- K2O-MgO-Al2O3-ZnO-ZrO2-P2O5 glass system has been reported. K2O mol% has been varied from 1 to 3 mol% while keeping Al2O3 at 2 mol%. The glass structure was analyzed by MAS-NMR spectroscopy. Heat treated glass systems were studied by using XRD, SEM and DTA to analyse the sintering and crystallization behavior. Increased amount of K2O modified the role of Al2O3, which acted as glass network former and formed [AlO4/2] tetrahedron unit, which eventually polymerized the glass structure. Consequently, lithium disilicate (LS2) crystallization was suppressed and crystallization of lithium metasilicate (LS) was promoted. As a result, while in the sample with 1 mol% K2O LS2 appeared as the main crystalline phase and LS as minor phase, 3 mol% K2O samples did not show any lithium disilicate throughout the sintering temperature range. The K2O:Al2O3 ratio did not have a significant impact on densification of these glass-ceramics. GRAPHICAL ABSTRACT","PeriodicalId":23233,"journal":{"name":"Transactions of the Indian Ceramic Society","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44228669","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}

引用次数: 3

An Economic Formulation to Elaborate Resistant Technical Porcelains Using Abundant Raw Materials: Thermal and Rheological Properties Characterization 一种利用丰富原料制备耐热技术瓷的经济配方:热学和流变性能表征

IF 1.2 4区材料科学

Transactions of the Indian Ceramic Society Pub Date : 2021-10-02 DOI: 10.1080/0371750X.2021.2011786

S. Kitouni

引用次数: 0