Search results for " Ceramics"

showing 7 items of 117 documents

Study of phase transition in Bi3TiNbO9-BaBi2Nb2O9 ceramics

2016

Abstract The subject of the paper is lead free bismuth layer structure oxides (1-x)Bi3TiNbO9-xBaBi2Nb2O9 (x=0; 1; 2; 3 mol). The influence of Bi3TiNbO9/BaBi2Nb2O9 ratio on dielectric and structural properties was studied in a wide range of temperatures. Change in the ratio causes a decrease in the maximum value of dielectric permittivity and shifts the temperature of ε’max to low values, leading to linear decreasing of average grain size and linear increasing of ceramics density. These results indicate an augment of the packing degree and the participation of pores are significantly decreased with the increase of BaBi2Nb2O9 compound intake. Moreover, for 0.7Bi3TiNbO9-0.3BaBi2Nb2O9 ceramics …

lcsh:TN1-997Phase transitionCeramicsMaterials science02 engineering and technologyDielectric01 natural sciencesX ray methods0103 physical scienceslcsh:TA401-492CeramicComposite materiallcsh:Mining engineering. MetallurgyPhase transition010302 applied physicsPhase transition CeramicsMetals and Alloys021001 nanoscience & nanotechnologyGrain sizeGrain sizevisual_artDielectric propertiesvisual_art.visual_art_mediumlcsh:Materials of engineering and construction. Mechanics of materials0210 nano-technologyX-ray methods
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The Effect of Dopants on Sintering and Microstructure of Lead-free KNN Ceramics

2011

Lead-free potassium sodium niobate (K0.5Na0.5)NbO3 (KNN) has been prepared via conventional ceramic processing method. The influence of 0.5 wt% - 1.5 wt% MnO2 and WO3 addition on the sintering, crystallographic structure, microstructure and dielectric properties of KNN has been investigated. Optimal sintering temperatures of KNN ceramics were observed to be in the narrow interval: 1090 °C - 1110 °C for MnO2 doped KNN; 1150 °C - 1170 °C for pure KNN and doped with WO3. XRD patterns showed that all the samples have single perovskite structure with monoclinic structure. Microstructure of ceramics was changed greatly by using dopants.http://dx.doi.org/10.5755/j01.ms.17.1.251

lead-freelcsh:TN1-997sinteringMaterials scienceDopantDopingAnalytical chemistrySinteringMineralogyDielectricCrystal structureMicrostructurepotassium sodium niobatevisual_artpiezoelectric ceramicsvisual_art.visual_art_mediumoxide additivesGeneral Materials ScienceCeramiclcsh:Mining engineering. MetallurgyMonoclinic crystal systemMedžiagotyra
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Analysis and optimization of hybrid double lap aluminum-GFRP joints

2014

In this paper a systematic investigation of the mechanical performance of hybrid double-lap Al-GFRP bonded-bolted joints, has been carried out by using experimental analyses and numerical simulations. In order to detect the optimal geometric configuration, as well as to highlight the contribution of adhesive and bolts, the results relative to hybrid joints have been compared with those of simply adhesively bonded and simply bolted joints. The experimental and numerical results have shown that by using the minimum overlap length provided from theory, the bolt leads to a significant decreasing of both the maximum shear and the maximum peel stresses in the adhesive layer and, consequently, the…

musculoskeletal diseasesEngineeringBondingbusiness.industryBolting; Bonding; Fatigue; Hybrid joints; Civil and Structural Engineering; Ceramics and CompositesHybrid jointchemistry.chemical_elementStructural engineeringFibre-reinforced plasticFatigue limitShear (sheet metal)Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchinechemistryAluminiumBolted jointUltimate tensile strengthCeramics and CompositesAdhesiveBoltingComposite materialbusinessJoint (geology)FatigueCivil and Structural EngineeringComposite Structures
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Il Museo e il territorio - Il MUCEB di Burgio

2018

Analysis of the relationship between the museological dimension of the museum institution and the socio-cultural context of the territory. The case of the Museum of Ceramics in Burgio is examined.

museum territory institution Sicily museology MUCEB ceramics Burgioeconomy culture tourism promotion
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Criteri museologici per il MUCEB

2018

The essay traces the museological criteria followed by the author for the layout of the Museum of Ceramics in Burgio.

museumceramicsburgiomuseologyterritorylayouthistory of ceramics
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Study of the Effect of Two Phases in Li4SiO4–Li2SiO3 Ceramics on the Strength and Thermophysical Parameters

2022

This research was funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (No. BR11765580). The research of the team from Latvia (A.M., V.P. and A.I.P.) has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200—EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. The research was partly (A.M., V.P. and A.I.P.) performed in …

phase compositionblanketsGeneral Chemical Engineeringlithium orthosilicatelithium-containing ceramicsGeneral Materials Science:NATURAL SCIENCES::Physics [Research Subject Categories]strengthblankets; lithium-containing ceramics; strength; hardness; phase composition; lithium orthosilicatehardnessNanomaterials; Volume 12; Issue 20; Pages: 3682
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Consumir la obra de terra. Los orígenes de la cerámica valenciana por el lado de la demanda (1283-1349)

2018

The origins of Valencian ceramic tableware, one of the most coveted products of the Late Middle Ages, have traditionally been explained from the supply perspective. The attention given to technological and stylistic–i.e. productive–aspects has tended to eclipse the issues that go beyond the objects themselves and affect the viewpoint of the consumer: to what extent was the demand for obra de terra by Valencian society key to the start of its production? This essay considers this matter using a sample of 232 probate inventories from between 1283 and 1349, to which will be applied quantitative analysis based on the historiography of consumption. It will be argued that, before the Black Death,…

vajilla de mesaHconsumption; tableware; ceramics; probate inventories; fashionconsumoSocial Sciencesconsumo; vajilla de mesa; cerámica; inventarios post mortem; modainventarios post mortemcerámicamodaHispania : Revista española de historia
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