Glass - Back to the Future!



Presenting Author:
Zully Matamoros-Veloza
<zullyma@itsaltillo.edu.mx>

article posted 2 Apr 2016

Zully Matamoros-Veloza

Bachelor of Chemistry. Faculty of Chemistry at the National University of Colombia) 1989, Master of Science (Chemistry), Kochi University, Japan 2000. PhD. Doctorate of Philosophy in science. Kochi University, Japan, 2005.

Particular areas of research work: processing and fabrication of ceramic materials, recycling of solid materials, and synthesis of biomaterials by hydrothermal processing.

Professional experience:

1. Researcher and lecturer at the National University of Colombia Faculty of Sciences from August 1, 1988 to June 30 of 1989.
2. Scientific Researcher at the: Research Institute for Earth Sciences and Mining Chemical - Bogotá - Colombia, D. C. 1989 to 1997.
3. Research stay at Tohoku University, Japan, Faculty of Metallurgy, "Manufacturing ceramic activities of Al/Al2O3 by reactions of replacement in cast aluminum". October 1993 - March 1995.
4. Research stay in the Institute for advanced materials processing (IAMP), University of Tohoku, Japan, Study of the reaction of the TiCl3 composite with sulfur in closed system. September 1995 - July 1996.
5. Professor at the Institute Technological of Saltillo, since the September 16th, 2000 - present.

Recent Publications:

1. Z. Matamoros-Veloza, J.C.Rendón-Angeles, K.Yanagisawa, E.E.Mejia-Martínez, J.R. Parga, Low temperature preparation of porous materials from TV-panel glass compacted via hydrothermal hot pressing, Ceramics International 41(2015 )12700?12709

2. J.C. Rendón-Angeles, Z. Matamoros-Veloza, J. López-Cuevas, L.A. González, K.L. Montoya- Cisneros, K. Yanagisawa, Willis-Richards, J. Diaz-Algara Rapid synthesis of scheelite SrWO4 particles using a natural SrSO4 ore under alkaline hydrothermal conditions, J, Hydrometallurgy, 157 (2015) 116- 126.

3. Study of preparation of particles of calcium hydroxyapatite doped with mg and Si simultaneously produced by hydrothermal synthesis, L.J. Vasquez-Elizondo, J.C. Rendón-Ángeles, Z. Matamoros- Veloza, K. Yanagisawa and M.I.Pech-Canul, 35 Congreso Internacional de Metalurgia y Materiales, 2013, 38-47.

4.Detoxification of cyanide using titanium dioxide and hydrocyclone sparger with chlorine dioxide, J.R. Parga, V. Vazquez, J.L.Valenzuela, Z. Matamoros V. and G. Gonzalez, Chemical Speciation and Bioavailability 2012, 24(3) 176.

5.Preparation of Selected Ceramic Compounds by Controlled Crystallization Under Hydrothermal Conditions, J. C Rendón-Angeles, Z.Matamoros-Veloza and K.Yanagisawa, Chapter of the book, Crystallization ? Science and Technology, 2012, chapter 8, IN-Tech, pp 207-242.

6.Hydrothermal Sintering under Mild Temperature Conditions: Preparation of Calcium-deficient Hydroxyapatite Compacts, K.Yanagisawa, J.Hyen Kim, C.Sakata, A.Onda, E. Sasabe, A Journal of Chemical Sciences, 2010, 1-7 vol. 65b.

7.Hydrothermal synthesis of perovskite strontium doped lanthanum chromite fine powders and its sintering, J.C. Rendón-Angeles, K.Yanagisawa, Z.Matamoros-Veloza, M.I.Pech-Canul, J.Mendez- Nonell, S. Diaz-de la Torre, Journal of Alloys and Compound, 2010, 504, 251-256.






Preparation of porous glass from waste TV panel glasses

Zully Matamoros-Veloza*,1, Juan Carlos Rendón-Angeles2, Kazumichi Yanagisawa3


Preparation of porous glass materials occurred employing compacted glass particles by the Hydrothermal hot-pressing technique, the particles consisted on analogue TV panel glass (Philips Television, Mexico). The glass TV panel was pulverized then a sample of 5g with particle size (<38 μm) was mixed with different amounts of the selected solvents (5 - 20 wt %) water and Na2CO3 solutions. Two different concentrations of the Na2CO3 solutions (0.1 and 0.5 M) were used as foaming agent. The mixture was treated under hydrothermal hot pressing conditions at a temperature of 200oC for 2 h, with a constant loading pressure of 20 MPa. Subsequently, the compacts were conventionally heated at 700°C for 1 h in air.

The TV glass panel particles were markedly dissolved with all the solvents employed, the glass dissolution was controlled by the amount of the aqueous solution mixed to the glass powder during the densification stage. The reaction between glass particles with the solvents selected, water and Na2CO3 solutions; produced a new solid glass phase incorporating water molecules and Na+ and CO3-2 ions, respectively. After heating the compacts, a marked expansion of the glass compacts occurred. The expansion of HHP compacted TV-panel glass specimens was further increased on the samples prepared with the Na2CO3 solution with a concentration of 0.5 M, the foamed glasses exhibited a low apparent densities varying between 0.309 - 0.319 g/cm3.

The figure corresponds to the apparent density of the compacted porous glass materials. Moreover, an important consideration in this particular type of glass is that the densification of the TV panel glass particles was greatly influenced by the content of the alkaline solvent, due to the presence of alkaline ions such as K+, Ba+2 and Ca+2 in the raw waste glass composition coupled with the Na+ and CO3-2 ions incorporated with the solvent solution, this chemical interaction promoted the partial dissolution of the glass particles during the compaction process.

Thus, the large content of alkaline elements might slightly decrease the softening temperature of the new glass phase, and the decomposition of these phase produces the formation of both water vapor and CO2 gas, the formation of these gases must achieve the increase of the internal pressure inside the soften glass bubbles, resulting on a remarkable expansion of the pseudo-spherical pores, in consequence this process produced the maximum expansion with the lowest apparent density for the foamed specimens.


Institutions:

1 Technological Institute of Saltillo, Research and Graduate Division, Saltillo 25280, México.

2 Research Institute for Advanced Studies of the NPI, Campus Saltillo, Saltillo 25900, México.

3 Research Laboratory of Hydrothermal Chemistry, Faculty of Science, Kochi University, Kochi 780-8520, Japan