Epitoanyag - Journal of Silicate Based and Composite Materials最新文献

{"title":"Thermal conductivity of wood-plastic composites as insulation panels: theoretical and experimental analysis","authors":"Hadeel Mahmood Mussa, Tawfeeq Wasmi M. Salih","doi":"10.14382/EPITOANYAG-JSBCM.2021.9","DOIUrl":"https://doi.org/10.14382/EPITOANYAG-JSBCM.2021.9","url":null,"abstract":"The aim of this study is evaluating the thermal performance of wood plastic composites (WPCs) as insulation panels depending on the values of thermal conductivity (k). Three types of wood flour taken from (pine, oak and walnut) trees with concentrations (10, 20, 30 %), and two types of thermoplastics; high density polyethylene (HDPE) and polypropylene (PP), have been selected for the evaluation. Theoretical work uses mathematical relations in the calculation of thermal conductivity of WPCs. Experimental work includes the manufacturing of the specimens, the measurements of k-values. The results show that the increasing in wood content leads to a reduction in k-values for WPCs by 6-8.5% for each 10% addition of wood. The k-values of WPCs tend to increase, when temperatures rise from 25-75 oC, by 20-25% for HDPE-wood composites, and by 15-20% for PP-wood composites. Furthermore, 10 % of water content will increase the k-value by 10-20%.","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"55 44 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89743221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of foundry wastes on the quality of autoclaved sand-lime materials","authors":"Z. Pytel","doi":"10.14382/epitoanyag-jsbcm.2021.15","DOIUrl":"https://doi.org/10.14382/epitoanyag-jsbcm.2021.15","url":null,"abstract":"The paper presents the results of research on the possibility of reusing selected types of foundry waste, i.e. used molding and core sands and dust obtained in the process of their regeneration, as alternative or supplementary materials in relation to the quartz sand originally used in manufacturing of sand-lime bricks. In the production technology of sand-lime products, quartz sand is used as aggregate. A rational factor in favor of such a technological solution is the high content of crystalline silica in the waste molding and core sands, in which the mineral matrix is composed of good quality quartz sands. The research concept covers production of a series of samples of autoclaved silicate materials formed by pressing, from raw material mixtures involving the discussed waste materials. In the laboratory tests conducted for the preparation of autoclaved materials of the sand-lime brick type, apart from traditional raw materials in the form of natural quartz sand and burnt lime, different molding waste and/or core sand materials and post-regenerative dusts were used for composing raw material mixtures. Foundry industry wastes were introduced into the basic raw material based on the gradually increasing substitution of quartz sand, in the amount within the range of 0 100% (wt. %). The assessment of the possibility of using the discussed waste materials in the indicated direction was based on the result of a comparative analysis, covering the main functional characteristics of two types of materials, i.e. reference material, obtained from raw material mixture, containing no waste and series of experimental materials, produced with various quantitative and qualitative contributions of waste materials. The characteristics of the obtained autoclaved materials are also supplemented by the results of the leaching tests, for heavy metal elements and the analysis of selected aspects of the microstructure carried out by the SEM and EDAX method. The results of the research show that it is possible to use casting waste compounds after their processing, in the production of autoclaved sand-lime products. This processing of wastes is twostage operation. The purpose of the first stage is to restore the primary graining of quartz sand used to obtain foundry moulds and cores, while the second stage is to remove the organic binder residues that appear on the quartz sand grains in the form of thin layers hindering the reaction with burnt lime.","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"150 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77487390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examination of the Influence of Cobalt Substitution on the Properties of Barium Titanate Ceramics","authors":"M. Tihtih, Irina N. Sevostianova, E. Kurovics, T. Sablina, S. Kulkov, L. Gömze","doi":"10.14382/epitoanyag-jsbcm.2021.24","DOIUrl":"https://doi.org/10.14382/epitoanyag-jsbcm.2021.24","url":null,"abstract":"Cobalt (Co) doped Barium titanate (BaTiO3) powders, with Co concentration (0,5 and 10 mol%), are synthesized by the sol-gel technique and characterized by Thermogravimetric analysis (TGA), and Differential thermal analysis (DTA), X-Ray diffraction (XRD), Fourier Transform Infrared (FTIR) and scanning electron microscopy (SEM). X-ray diffraction (XRD) patterns of the obtained powders, calcined at a relatively low temperature (1000 °C/3 h), found their crystallization in the pure perovskite structure without the appearance of secondary phases. XRD results reveal that the Co decreases the lattice parameters, the volume of the unit cell and the crystallite size of BaTiO3. The investigations carried out by FT-IR spectroscopy allow the investigation of the substitution procedure behavior associated to the Co incorporation into BaTiO3 lattice. The evolution of the physical parameters as functions of the dopant content have been examined based on XRD and FT-IR results. Furthermore, the morphology and the shape variation of particle size were studied through SEM.","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90502051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wind turbine blades structure based on palm cellulose fibers composite material","authors":"A. Gherissi, Fahd Alahmari, Mohamed Fadhl, Adnan Asiri, Meshal Alhwiti, O. Alamri, Metab Alanisi, I. Nasri","doi":"10.14382/epitoanyag-jsbcm.2021.16","DOIUrl":"https://doi.org/10.14382/epitoanyag-jsbcm.2021.16","url":null,"abstract":"The uses of the cellulosic fibers in the natural fiber reinforced polymer composites (NFC) for constructing a wind turbine blade structure will be evaluated in the present work through experimental study. The blade shape designed according to the local wind characteristics on the Tabuk city in Saudi Arabia. The blade mechanical resistance identifies, according to the different forces applied to wind turbine blades. The palm cellulosic fibers were used as reinforcement. Those fibers were prepared through mechanical and chemical extraction process. The extraction was through mechanical decomposition in thin fibers and chemical extraction method by chloride and alkaline. To evaluate the reinforcement effect on wind turbine blades a horizontal wind turbine was constructed. The palm natural fibers used as reinforcement of blades with resinepoxy gives an encouraging result in the sense of robustness and efficiency. The uses of NFC based on cellulosic fibers for constructing wind turbine blades can be considered as a potential candidate for the manufacturing of total recycling wind turbine blades from natural fibers.","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"31 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72839698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stress-strain behavior of high porous zirconia ceramic","authors":"Irina N. Sevostianova, T. Sablina, S. Kulkov, M. Tihtih, L. Gömze","doi":"10.14382/epitoanyag-jsbcm.2021.23","DOIUrl":"https://doi.org/10.14382/epitoanyag-jsbcm.2021.23","url":null,"abstract":"irina n. SEVOSTIANOVA  Institute of Strength Physics and Materials Science, SB RAS, Tomsk, Russia  sevir@ispms.ru tatiana yu. SABLINA  Institute of Strength Physics and Materials Science, SB RAS, Tomsk, Russia  sabtat@ispms.ru Sergei n. KULKOV  Institute of Strength Physics and Materials Science, SB RAS, Tomsk, Russia  kulkov@ms.tsc.ru MoHaMMed TIHTIH  Institute of Ceramics and Polymer Engineering, University of Miskolc, Hungary  medtihtih@gmail.com láSzló a. GÖMZE  Institute of Ceramics and Polymer Engineering, University of Miskolc, Hungary, IGREX Engineering Service Ltd  femgomze@uni-miskolc.hu","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"14 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77963270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of Transverse Deformation of Porous Alumina during Uniaxial Mechanical Tests","authors":"A. Kashin, A. Kulkov, S. Kulkov, E. Kurovics, L. Gömze","doi":"10.14382/epitoanyag-jsbcm.2021.21","DOIUrl":"https://doi.org/10.14382/epitoanyag-jsbcm.2021.21","url":null,"abstract":"","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"52 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78396803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytics of swelling potential on highly expansive (plastic) clayey soils behavior for sustainable admixture stabilization","authors":"K. Onyelowe, M. Onyia, Duc Bui Van, A. Firoozi, Talal S. Amhadi","doi":"10.14382/epitoanyag-jsbcm.2021.13","DOIUrl":"https://doi.org/10.14382/epitoanyag-jsbcm.2021.13","url":null,"abstract":"The swelling potential analytics and the ion exchange reaction of highly expansive soils in a soil stabilization process have been reviewed. The importance of these factors in deciding suitable construction materials and chemical additives utilized as alternative or supplementary binders in clayey soil stabilization has been discussed also. The outcome of this study has shown that Al3+, Si4+, and Ca2+ are the most suitable exchangeable cations with OHas the suitable exchangeable anion leading to the formation of C-A-S-H, which is the compound responsible for strengthening. The swelling potential analytics also proposed the expression wsT = 0.00216 × as the total swelling potential with respect to the depth of a foundation material constructed with clayey soil. This study revealed that during the wet season, hydraulically bound foundation materials experience undesirable volume changes with the highest swelling potential expected at the surface within the active (unstable) zone of the foundation. Generally, the treatment of highly expansive soil with very high swelling potential should be concentrated at the surface and reduced along the depth of the foundation matrix. With this proposed guide, the utilization of alternative or supplementary cementing materials as construction materials in the stabilization of clayey soil to improve swelling can be conducted with a more sustainable approach.","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"33 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75365006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical properties of mullite reinforced ceramics composite produced from kaolin and corn starch","authors":"E. Kurovics, A. Kulkov, J. F. Ibrahim, A. Kashin, Péter Pala, V. Nagy, S. Kulkov, L. Gömze","doi":"10.14382/epitoanyag-jsbcm.2021.22","DOIUrl":"https://doi.org/10.14382/epitoanyag-jsbcm.2021.22","url":null,"abstract":"In this research, the authors have prepared mullite-containing ceramics by mixing Sedlecky ml kaolin, Nabalox 315 alumina and corn starch as a bio-origin additive. Pellets were prepared from the mixtures using an uniaxial compression process. The pressed samples were pre-sintered at 1250 °C using oxidation and reduction atmospheres and then sintered at a temperature above 1400 °C in nitrogen gas. In this way, the typical carbothermal reduction and nitridation processes of clay minerals were performed, reinforced mullite ceramics were prepared and their main mechanical properties were investigated. Based on the obtained results, sintering in nitrogen gas resulted in a more wear-resistant surface layer.","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82652375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rheological properties of a slip based on synthesized slavsonite and properties of ceramic materials based on it","authors":"G. Lisachuk, R. Kryvobok, A. Zakharov, O. Fedorenko, V. Voloshchuk, M. Zhadko, V. Sarai","doi":"10.14382/EPITOANYAG-JSBCM.2021.11","DOIUrl":"https://doi.org/10.14382/EPITOANYAG-JSBCM.2021.11","url":null,"abstract":"","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"13 1","pages":"68-71"},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89869259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of organoclay reinforcement on the mechanical and thermal properties of unsaturated polyester resin composites","authors":"M. Abobo, L. Rodriguez, Sonia D. Salvador, Henry C. Siy, D. Peñaloza","doi":"10.14382/EPITOANYAG-JSBCM.2021.10","DOIUrl":"https://doi.org/10.14382/EPITOANYAG-JSBCM.2021.10","url":null,"abstract":"Unsaturated polyester resin (UPR) is a popular material of choice for composite materials, particular in glass fiber–reinforced plastics (FRP) and casting resins (non-reinforced). Our study presents the preparation of clay-based UPR composite materials employing various loadings of organo-modified montmorillonite clay as a filler to a UPR serving as the matrix material that resulted in enhanced thermal and mechanical properties compared to a bare UPR. Wetting behavior of the resulting composites was much better than UPR only. Such property enhancements were connected to the exfoliated morphology of the composite materials. Tensile measurements through universal testing machine was carried out to measure tensile strength while thermal stability was characterized using thermogravimetric analysis. Wetting behavior of the composite materials was evaluated using contact angle measurements. Evaluation of the structure and morphology of the composite materials as well as clay fillers was determined through scanning electron microscopy (SEM), Fourier transform (FTIR) infrared spectroscopy and x-ray diffraction (XRD) technique.","PeriodicalId":11915,"journal":{"name":"Epitoanyag - Journal of Silicate Based and Composite Materials","volume":"5 1","pages":"63-67"},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85420760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}