Paper Title:
Non Conventional Synthesis of Monoclinic Celsian from Ba-Exchanged Zeolite A: Study of the Effect of Residual Na and Forming Pressure
  Abstract

Four samples of Ba-exchanged zeolite A, bearing 0.27, 0.43, 0.58 and 0.74 meq/g Na residual amounts, were thermally treated in the temperature range 200-1500 °C for times up to 28 hours. The same samples were pressed at 30 and 60 MPa to manufacture cylindrical pellets, which were thermally treated at 1300 °C for 5 hours. Thermally treated materials were characterized by room temperature XRD. The sequence of thermal transformations that Ba-exchanged zeolite A undergoes (zeolite ® amorphous phase ® hexacelsian ® monoclinic celsian) and the strong mineralizing action developed by Na are confirmed. Pressing the Ba-exchanged zeolite A powder-like samples to obtain cylindrical pellets is found to expedite the sluggish final phase transition hexacelsian ® monoclinic celsian. The optimum residual Na content of Ba-exchanged zeolite A to be transformed into monoclinic celsian is assessed to range between 0.27 and 0.43 meq/g.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
963-968
DOI
10.4028/www.scientific.net/AST.45.963
Citation
C. Ferone, M. Pansini, F. Andreola, L. Barbieri, C. Siligardi, T. Manfredini, "Non Conventional Synthesis of Monoclinic Celsian from Ba-Exchanged Zeolite A: Study of the Effect of Residual Na and Forming Pressure ", Advances in Science and Technology, Vol. 45, pp. 963-968, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Danieli A.P. Reis, D.S. Almeida, Maria do Carmo de Andrade Nono, Cosme Roberto Moreira Silva, Francisco Piorino Neto
Abstract:Thermomechanical and electrical properties of zirconia-based ceramics have led to a wide range of advanced and engineering ceramic...
546
Authors: Zheng Lan Lu, Dan Yu Jiang, Lei Hu, Guo Qiang Zhu, Qiang Li, Cheng Zhang
Abstract:This paper explores the effects of dopant content on the aging behavior of tetragonal zirconia polycrystal (TZP). TZP powders with varying...
1188
Authors: Junji Ikeda, Megumi Mabuchi, Takefumi Nakanishi, Fumiaki Miyaji, Masaru Ueno, Giuseppe Pezzotti
Abstract:As for zirconia toughened alumina (ZTA) with various ratios of alumina/zirconia, crystal and micro structures, fracture toughness and phase...
767
Authors: Luiz A. Bicalho, R.C. Souza, Claudinei dos Santos, M.J.R. Barboza, Carlos Antonio Reis Pereira Baptista
Abstract:In this work the cyclic fatigue life of 3mol.%Y2O3-stabilized zirconia polycrystalline ceramics, doped with 5%wt 3CaO.P2O5,-SiO2-MgO, has...
628
Authors: Gholamhossein Nozary, Ghodratollah Roudini, Ali Akbar Farashiani
Chapter 6: Composite Materials
Abstract:Porous ZrO2-Al2O3 ceramic composites containing 0, 30 and 50 wt% Al2O3 were prepared by solid state sintering in the temperature range of...
515