5 results match your criteria translucent zro

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Microstructural, mechanical, and optical characterization of an experimental aging-resistant zirconia-toughened alumina (ZTA) composite.

Dent Mater 2020 12 15;36(12):e365-e374. Epub 2020 Sep 15.

Department of Prosthodontics and Periodontology, University of São Paulo - Bauru School of Dentistry, Bauru, SP, Brazil.

Objective: To evaluate the effect of aging on the microstructural, mechanical, and optical properties of an experimental zirconia-toughened alumina composite with 80%AlO and 20%ZrO (ZTA Zpex) compared to a translucent zirconia (Zpex) and Alumina.

Methods: Disc-shaped specimens were obtained by uniaxial and isostatic pressing the synthesized powders (n = 70/material). After sintering and polishing, half of the specimens underwent aging (20 h, 134 °C, 2. Read More

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December 2020

Ultrastrong Translucent Glass Ceramic with Nanocrystalline, Biomimetic Structure.

Nano Lett 2018 11 23;18(11):7146-7154. Epub 2018 Oct 23.

Applied Materials Science, Department of Engineering Science , Uppsala University , Uppsala 751 21 , Sweden.

Transparent/translucent glass ceramics (GCs) have broad applications in biomedicine, armor, energy, and constructions. However, GCs with improved optical properties typically suffer from impaired mechanical properties, compared to traditional sintered full-ceramics. We present a method of obtaining high-strength, translucent GCs by preparing ZrO-SiO nanocrystalline glass ceramics (NCGCs) with a microstructure of monocrystalline ZrO nanoparticles (NPs), embedded in an amorphous SiO matrix. Read More

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November 2018

Chlorophyll a Covalently Bonded to Organo-Modified Translucent Silica Xerogels: Optimizing Fluorescence and Maximum Loading.

Molecules 2016 Jul 22;21(7). Epub 2016 Jul 22.

Department of Central Electron Microscopy Laboratory, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Ciudad de México 09340, Mexico.

Chlorophyll is a pyrrolic pigment with important optical properties, which is the reason it has been studied for many years. Recently, interest has been rising with respect to this molecule because of its outstanding physicochemical properties, particularly applicable to the design and development of luminescent materials, hybrid sensor systems, and photodynamic therapy devices for the treatment of cancer cells and bacteria. More recently, our research group has been finding evidence for the possibility of preserving these important properties of substrates containing chlorophyll covalently incorporated within solid pore matrices, such as SiO₂, TiO₂ or ZrO₂ synthesized through the sol-gel process. Read More

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Comparative Study of the Optical and Textural Properties of Tetrapyrrole Macrocycles Trapped Within ZrO₂, TiO₂, and SiO₂ Translucent Xerogels.

Molecules 2015 Oct 23;20(10):19463-88. Epub 2015 Oct 23.

Department of Chemistry, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, Mexico, D.F. 09340, Mexico.

The entrapping of physicochemical active molecules inside mesoporous networks is an appealing field of research due to the myriad of potential applications in optics, photocatalysis, chemical sensing, and medicine. One of the most important reasons for this success is the possibility of optimizing the properties that a free active species displays in solution but now trapped inside a solid substrate. Additionally it is possible to modulate the textural characteristics of substrates, such as pore size, specific surface area, polarity and chemical affinity of the surface, toward the physical or chemical adhesion of a variety of adsorbates. Read More

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October 2015

Translucency of zirconia copings made with different CAD/CAM systems.

J Prosthet Dent 2010 Jul;104(1):6-12

Alma Mater Studiorum University of Bologna, Department of Oral Sciences, Section of Prosthodontics, Via S. Vitale 59, 40125 Bologna, Italy.

Statement Of Problem: Zirconia cores are reported to be less translucent than glass, lithium disilicate, or alumina cores. This could affect the esthetic appearance and the clinical choices made when using zirconia-based restorations.

Purpose: The purpose of this in vitro study was to evaluate the translucency of zirconia copings for single crowns fabricated using different CAD/CAM systems, using lithium disilicate glass ceramic as a control. Read More

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