Lamellar ceramics of Ca2SiO4 prepared by mechanical activation of powders
Stoichiometric mixtures of calcium carbonate and silicon oxide have been mechanically activated by milling during several hours (29 and 50)previous to the solid state reaction, in order to obtain dicalcium silicate, Ca2SiO4. X-ray powder diffraction and differential thermal analysisstudies show that...
| Authors: | , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2006 |
| Country: | México |
| Institution: | Benemérita Universidad Autónoma de Puebla |
| Repository: | Redalyc-BUAP |
| OAI Identifier: | oai:redalyc.org:57065208 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=57065208 |
| Access Level: | Open access |
| Keyword: | Física, Astronomía y Matemáticas Dicalcium silicate lamellar morphology mechanical activation |
| Summary: | Stoichiometric mixtures of calcium carbonate and silicon oxide have been mechanically activated by milling during several hours (29 and 50)previous to the solid state reaction, in order to obtain dicalcium silicate, Ca2SiO4. X-ray powder diffraction and differential thermal analysisstudies show that the mechanical processing of the powders induces changes in the orientational uniformity of crystallites and the diminutionof the decomposition temperature of the calcium carbonate. Microlamellar particles of ¯-Ca2SiO4 were obtained when the solid state reactionwas achieved at 1450±C, whereas ¯-Ca2SiO4 and ®L -Ca2SiO4 phases were obtained when the reaction took place at 1000±C. By means ofthe powder processing described in this work, we can prepare phase ¯-Ca2SiO4 without any chemical stabilizer and with an unusual lamellarmorphology. |
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