scholarly journals Bioinspired Strong and Highly Porous Glass Scaffolds

2011 ◽  
Vol 21 (6) ◽  
pp. 1058-1063 ◽  
Author(s):  
Qiang Fu ◽  
Eduardo Saiz ◽  
Antoni P. Tomsia
Keyword(s):  
Porous Glass ◽  
Highly Porous

Characterisation of highly porous glass ceramic scaffolds

2004 ◽  
Vol 46 (5) ◽  
pp. 243-247
Author(s):  
Wolfram Harbich ◽  
Udo Mücke ◽  
Georg Berger
Keyword(s):  
Porous Glass ◽  
Glass Ceramic ◽  
Highly Porous

In Vivo reaction of the Highly Porous Glass Ceramics in the Rabbit Tibia: Radiological and Histological Analysis

1996 ◽  
Vol 31 (4) ◽  
pp. 844
Author(s):  
Young Min Kim ◽  
Hee Joong Kim ◽  
Gyu Hwan Kim ◽  
Jae Il Lee ◽  
Soo Taek Lim
Keyword(s):  
Porous Glass ◽  
Histological Analysis ◽  
Glass Ceramics ◽  
Rabbit Tibia ◽  
Highly Porous

Preparation of Porous Glass Scaffolds by Salt Sintering Technique

2008 ◽  
Vol 587-588 ◽  
pp. 52-56 ◽  
Author(s):  
Erika Davim ◽  
Maria Helena F.V. Fernandes ◽  
Ana Maria R. Senos
Keyword(s):  
Porous Glass ◽  
Thermal Cycle ◽  
Thermal Analyses ◽  
Engineering Application ◽  
Tissue Engineering Application ◽  
Thermal Consolidation ◽  
Preliminary Study ◽  
Structure And Microstructure ◽  
Highly Porous

This paper reports a preliminary study on the development and characterization of a porous calcium phosphate glass-ceramic for tissue engineering application. To obtain porous glass scaffolds, a mixture of 3CaO.P2O5-SiO2-MgO glass (grain size below 20 'm) and NaCl with 200- 300 'm of particle size was taken in the volume proportion 1:1. The mixture was shaped into cylindrical samples (10 mm diameter x 10 mm thick) by using unidirectional pressing. The sintering thermal cycle was selected by means of thermal analyses (DTA/TG and dilatometry) in order to attain a high enough cohesion among the glass particles. After thermal consolidation, the salt was dissolved in water, resulting in highly porous materials. The effect of the sintering thermal cycle on the structure and microstructure characteristics of the scaffolds was investigated in this paper.

scholarly journals Processing of highly porous glass ceramic from glass and fly ash wastes

2018 ◽  
Author(s):  
Mohd Idham Mustaffar ◽  
Mohamad Haniza Mahmud
Keyword(s):  
Fly Ash ◽  
Porous Glass ◽  
Glass Ceramic ◽  
Highly Porous

Structure and Properties of Permeable Highly Porous Glass-Ceramics for Orthopedics and Traumatic Surgery

2016 ◽  
Vol 55 (5-6) ◽  
pp. 319-327 ◽  
Author(s):  
E. E. Sych ◽  
A. P. Yatsenko ◽  
T. V. Tomila ◽  
A. B. Tovstonog ◽  
Ya. I. Yevych
Keyword(s):  
Porous Glass ◽  
Glass Ceramics ◽  
Structure And Properties ◽  
Highly Porous

Fabrication of highly porous glass filters using capillary suspension processing

2015 ◽  
Vol 149 ◽  
pp. 470-478 ◽  
Author(s):  
Johannes Maurath ◽  
Jens Dittmann ◽  
Niko Schultz ◽  
Norbert Willenbacher
Keyword(s):  
Porous Glass ◽  
Highly Porous

scholarly journals Case studies of up-cycling of partially crystallized ceramic waste in highly porous glass-ceramics

2020 ◽  
Vol 261 ◽  
pp. 119971 ◽  
Author(s):  
P. Rabelo Monich ◽  
A. Rincon Romero ◽  
E. Rambaldi ◽  
E. Bernardo
Keyword(s):  
Case Studies ◽  
Porous Glass ◽  
Glass Ceramics ◽  
Ceramic Waste ◽  
Highly Porous

Use of fractals to describe microstructures of porous thick-film platinum electrodes

1992 ◽  
Vol 50 (1) ◽  
pp. 314-315
Author(s):  
Steven D. Toteda
Keyword(s):  
Fractal Dimension ◽  
Power Plants ◽  
Electrical Response ◽  
Cubic Phase ◽  
Platinum Electrodes ◽  
Fine Grained ◽  
Impedance Response ◽  
Platinum Particles ◽  
Energy Surfaces ◽  
Highly Porous

Zirconia oxygen sensors, in such applications as power plants and automobiles, generally utilize platinum electrodes for the catalytic reaction of dissociating O2 at the surface. The microstructure of the platinum electrode defines the resulting electrical response. The electrode must be porous enough to allow the oxygen to reach the zirconia surface while still remaining electrically continuous. At low sintering temperatures, the platinum is highly porous and fine grained. The platinum particles sinter together as the firing temperatures are increased. As the sintering temperatures are raised even further, the surface of the platinum begins to facet with lower energy surfaces. These microstructural changes can be seen in Figures 1 and 2, but the goal of the work is to characterize the microstructure by its fractal dimension and then relate the fractal dimension to the electrical response. The sensors were fabricated from zirconia powder stabilized in the cubic phase with 8 mol% percent yttria. Each substrate was sintered for 14 hours at 1200°C. The resulting zirconia pellets, 13mm in diameter and 2mm in thickness, were roughly 97 to 98 percent of theoretical density. The Engelhard #6082 platinum paste was applied to the zirconia disks after they were mechanically polished ( diamond). The electrodes were then sintered at temperatures ranging from 600°C to 1000°C. Each sensor was tested to determine the impedance response from 1Hz to 5,000Hz. These frequencies correspond to the electrode at the test temperature of 600°C.

Microstructural observations of the “Wustite-Spinel” coexistence following quenching of cation-excess spinels, Ni2(1+x)Ti1-xO4

1990 ◽  
Vol 48 (4) ◽  
pp. 1058-1059
Author(s):  
Ian M. Anderson ◽  
Arnulf Muan ◽  
C. Barry Carter
Keyword(s):  
Film Growth ◽  
Spinel Phase ◽  
Model Systems ◽  
Ion Milling ◽  
Coexistence Of Phases ◽  
Nonequilibrium Conditions ◽  
Diffraction Patterns ◽  
Spinel Structures ◽  
Highly Porous ◽  
Standard Techniques

Oxide mixtures which feature a coexistence of phases with the wüstite and spinel structures are considered model systems for the study of solid-state reaction kinetics, phase boundaries, and thin-film growth, and such systems are especially suited to TEM studies. (In this paper, the terms “wüstite” and “spinel” will refer to phases of those structure types.) The study of wüstite-spinel coexistence has been limited mostly to systems near their equilibrium condition, where the assumptions of local thermodynamic equilibrium are valid. The cation-excess spinels of the type Ni2(1+x)Ti1-xO4, which reportedly exist only above 1375°C4, provide an excellent system for the study of wüstite-spinel coexistence under highly nonequilibrium conditions. The nature of these compounds has been debated in the literature. X-ray and neutron powder diffraction patterns have been used to advocate the existence of a single-phase, non- stoichiometric spinel. TEM studies of the microstructure have been used to suggest equilibrium coexistence of a stoichiometric spinel, Ni2TiO4, and a wüstite phase; this latter study has shown a coexistence of wüstite and spinel phases in specimens thought to have been composed of a single, non- stoichiometric spinel phase. The microstructure and nature of this phase coexistence is the focus of this study. Specimens were prepared by ball-milling a mixture of NiO and TiO2 powders with 10 wt.% TiO2. The mixture was fired in air at 1483°C for 5 days, and then quenched to room temperature. The aggregate thus produced was highly porous, and needed to be infiltrated prior to TEM sample preparation, which was performed using the standard techniques of lapping, dimpling, and ion milling.

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