Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7887064 | Ceramics International | 2018 | 15 Pages |
Abstract
A systematic study of boron trioxide under high pressure and high temperature (HPHT) was conducted using a Chinese multi-anvil high-pressure apparatus (CHPA). The HPHT phase diagram was determined using X-ray diffraction measurements. Under high pressure (3.6-5.5â¯GPa) and low temperature (below 450â¯Â°C), the boron trioxide grains were reduced to the nanometer size and the hardness reaches to 13.9â¯GPa (5.5â¯GPa and 450â¯Â°C). The boroxol rings were produced only in the glass phase that was transformed from the α-B2O3 phase under HPHT. And the formation mechanism of boroxol rings was discussed according to Raman spectrum and crystal structure of α-B2O3 and β-B2O3.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Dongliang Chu, Hongan Ma, Jian Wang, Lixue Chen, Xiaopeng Jia,