Results 71 to 80 of about 3,069 (219)

Self-propagating High Temperature Synthesis of Pink Corundum

MATEC Web of Conferences, 2017
Pigments based on pink corundum have been obtained by self-propagating high temperature synthesis in Cr2O3-Al2O3-Al system using a small amount of chromium oxide (up to 0.5 wt %) in the composition of the green mixture.
Nazarova Anastasiya, Radishevskaya Nina, Kasatsky Nikolay, Karakchieva Natalia   +3 more
doaj   +1 more source

Comparative Evaluation of the Effect of Different Polishing Systems on Surface Roughness of Permanent 3D‐Printed Resins and a CAD/CAM Restorative Material

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective This study evaluated the effects of polishing systems, staining solutions, and aging time on the surface roughness of Computer‐aided design and computer‐aided manufacturing (CAD/CAM) and three‐dimensional (3D)‐printed permanent restorative materials. Methods Three 3D‐printed resins (VarseoSmile Crown plus (VSC), Saremco PrintCrowntec
Nilay Bayraktar, Nurgül Çetin Tuncer, Çağatay Barutçugil   +2 more
wiley   +1 more source

Preparação de pigmentos de aluminatos de cobalto para aplicação em vidrados cerâmicos

Cerâmica
Resumo Os pigmentos inorgânicos são os mais utilizados industrialmente, pois apresentam maior estabilidade química e térmica e podem ser produzidos com um elevado grau de pureza e uniformidade.
A. F. Costa, D. M. A. Melo, M. A. F. Melo, R. L. B. A. Medeiros, P. M. Pimentel, M. S. C. Câmara, L. Chantelle   +6 more
doaj   +1 more source

Pechini synthesis and microstructure of nickel-doped copper chromites

Materials Research, 2005
Spinel-type solid solutions were synthesized by the Pechini method and calcined between 500 and 900 °C for 4 hours and at 900 °C for 8 hours to produce ceramic pigments.
Patrícia Mendonça Pimentel, Antonio Eduardo Martinelli, Dulce Maria de Araújo Melo, Anne Michelle Garrido Pedrosa, Jardel Dantas Cunha, Carlos Neco da Silva Júnior   +5 more
doaj   +1 more source

Effects of Acidic Media on the Mechanical and Optical Properties of Digitally Designed Restorative Materials

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective This investigation assessed how acidic environments affect the optical behavior, surface roughness, and hardness of a newly developed 3D‐printed permanent resin compared with commonly used computer‐aided design/computer‐aided manufacturing restorative blocks.
Ismini Papoulidou, Petros Mourouzis, Andrea Baldi, Nicola Scotti, Dimitrios Dionysopoulos   +4 more
wiley   +1 more source

Effect of Cigarette Smoking on the Surface Roughness, Color, and Translucency of Zirconia Produced by Additive and Subtractive Manufacturing

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective To compare the surface roughness, color stability, and translucency of zirconia produced by additive manufacturing (AM) and subtractive manufacturing (SM) after exposure to cigarette smoking. Materials and Methods A total of 60 disc‐shaped specimens were fabricated from 2 methods: AM (INNI Cera BCM W500/1000) and SM (VITA YZ T).
Bengisu Mahmutluoglu, Nazli Aydin, Koray Soygun   +2 more
wiley   +1 more source

Assessing Color Inconstancy of CAD/CAM Materials: Influence of CIE White LED Illuminants and Substrate Shade

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective To assess how the CIE white LED illuminants and substrate shade impact the color inconstancy of high‐translucency CAD/CAM materials. Materials and Methods From the spectral reflectance factors of Lava Ultimate‐LU, Grandio blocks‐GB, VITA Enamic‐VE, and VITA Mark II‐M specimens (n = 3/material) measured on nine background shades (ND1 ...
Bruno Arruda Mascaro, Maria Tejada‐Casado, Miguel Ángel Martínez‐Domingo, Renata Garcia Fonseca, José Maurício dos Santos Nunes Reis, María M. Pérez   +5 more
wiley   +1 more source

Síntese de pigmentos cerâmicos por precipitação química Synthesis of ceramic pigments by chemical precipitation

Cerâmica, 2007
Os pigmentos cerâmicos são substâncias capazes de desenvolver cor em sólido inorgânico (cerâmica ou vidro) quando nele dispersar mantendo-se insolúvel no mesmo, sem reação química com o mesmo, nas elevadas temperaturas de processamento.
R. N. de Almeida, S. F. Santos, J. A. Sampaio, A. B. da Luz, T. Ogasawara, M. C. de Andrade   +5 more
doaj   +1 more source

Ultra‐High‐Speed Sintering of 3.5Y‐TZP Zirconia: Time Reduction Without Compromising Translucency

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives To assess, firstly, the impact of three sintering speeds on translucency and grain size of 3.5Y‐TZP zirconia (Katana HT) across clinically relevant thicknesses, and secondly, the effect of thermocycling on translucency. Materials and Methods Disc specimens were fabricated at six thicknesses (0.7–2.0 mm) and sintered using SLOW (7 h),
Tatiana Roman, Hamdi Jmal, Teissir Ben Ammar , Adrien Greffet, Marc Lenertz, Olivier Etienne   +5 more
wiley   +1 more source

Non-invasive Analyses of Ancient Ceramics Colorants

Croatica Chemica Acta, 2015
Present research exploits the benefits of the non-invasive and non-destructive spectroscopic methods in order to characterize the pigments which constitute the colorants found on ancient ceramic pieces.
Igor Lukačević, Dragana Rajković
doaj   +1 more source