|
|
| Home > JCE Print > Journal of Chemical Education > Issues >
2006
>
March
> |
|
In the Classroom
|
|
|
|
In Situ Observation of Glass Particle Sintering
|
Mario Godinho, Jr., Elson Longo, and Edson R. Leite
LIEC-CMDMC, Departamento de Química, Universidade Federal de São Carlos, CEP 13565-905, São Carlos, SP, Brazil
Rosiana Aguiar
Departamento de Ciência e Engenharia de Materiais, Universidade Federal de São Carlos, CEP 13565-905, São Carlos, SP, Brazil
|
|
March 2006
Vol. 83 No. 3
p. 410
|
|
|
|
| Abstract |
|
This article introduces the sintering process to chemistry students unfamiliar with the subject. The concepts are discussed and a movie is included showing the viscous flow sintering process of glass particles. Frenkel's model, which describes the viscous flow process, was applied to demonstrate its validity. Spherical soda-lime glass particles were heat treated at 750 °C in an optical microscope equipped with a hot stage. The glass sintering process was recorded using a digital camera coupled to the microscope. During sintering, the particle boundaries moved apart until the interface separating them was flat, subsequently joining to become a single particle as a result of the decrease in superficial free energy. Frenkel's model was verified for the vitrification process and for ceramic shrinkage during sintering. Two graphs indicate experimental measurements similar to those in Frenkel's model.
|
| Supplement |
A movie showing the in situ sintering of glass beads is available.
|
|
| More Information |
 Citation |
Aguiar, Rosiana; Godinho, Mario, Jr.; Orlandi, Marcelo O.; Longo, Elson; Leite, Edson R. J. Chem. Educ. 2006 83 410.
|
Keywords |
Chemical Engineering; Graduate Education / Research; Hands-On Learning / Manipulatives; Laboratory Instruction; Materials Science; Physical Chemistry; Solids; Thermodynamics; Upper-Division Undergraduate
|
History |
Created:
Last Updated: |
1/31/2006
2/9/2006
|
|
|
|
|
|
| Home > JCE Print > Journal of Chemical Education > Issues >
2006
>
March
> Page
410
|
|
|
| JCE HS CLIC |
|
Our Secondary School editors work hard to distill all the JCE materials to produce a fraction of particular interest to high school teachers. We call it CLIC.
|
| Contributions Welcome |
| JCE welcomes your submission |
| Advertisers |
| In recent years we have worked hard to better match our advertisers with our readers. When shopping for chemistry education materials, visit our advertisers' WWW sites first. |
| Be An Ambassador |
| Take JCE along on your outreach missions. Copies of the Journal, guest access to JCE Online, our publications catalog, and more are available for your participants. |
|
