Analysis of thermally-induced transformations of silica rocks after high temperature heat treatment

Title:

Analysis of thermally-induced transformations of silica rocks after high temperature heat treatment

Creator:

Geng, Jishi, Sun, Qiang, Zhang, Yuchun, and Zhang, Yuliang

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:8d7156bc-222c-4c4e-8a96-488c9dc90737
uuid:8d7156bc-222c-4c4e-8a96-488c9dc90737
issn:1214-9705
doi:10.13168/AGG.2017.0016

Subject:

Geologie. Meteorologie. Klimatologie, vysoké teploty, high temperatures, silica rocks, non-destructive analytical method, thermal expansion, 7, and 551

Type:

article, články, journal articles, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

High temperature alters the internal microstructure of rocks and consequently changes the physical and mechanical properties of rocks. Many studies have been carried out to examine the transformations in the microstructures of rocks under high temperature through near infrared spectroscopy (NIR), Raman spectroscopy, or thermo gravimetric analysis (TGA). The current review synthesizes the data from a number of literatures and summarizes the major transformations of silica rocks under high temperature. The analysis shows that silica rocks starts to lose the water adsorbed in open pores upon heating at about 150 °C. At 200-300 °C, the reaction between SiOH (silanole) in the rocks generates new Si-O-Si bonds as well as H2O, and decreases the open pores. The rocks undergo volume expansion at >550 °C, and the volume contracts and forms new micro pores or cracks which play an important role in the evacuation of the water., Jishi Geng, Qiang Sun, Yuchun Zhang and Yuliang Zhang., and Obsahuje bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2017 Volume:14 | Number:3 (187)

Harvested from:

CDK

Metadata only:

false