Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 25, 2018
Previous Article Next Article

Room-temperature synthesis of χ-Al2O3 and ruby (α-Cr:Al2O3)

Author affiliations

Abstract

In this work, we present a unique crystal growth synthesis of χ-Al2O3 accompanied with α-Cr:Al2O3 at room temperature. Raman spectroscopy and additions of Cr2O3 are key to identifying α-Cr:Al2O3 in trace amounts by the room temperature synthesis of ruby (α-Cr:Al2O3). The presence of this phase is further confirmed with HRTEM. The raw materials are pseudoboehmite and Cr2O3 that are treated mechano-chemically for the successful synthesis of ruby and χ-Al2O3. A thermal analysis approach is provided to explain the significant temperature reduction for the complete transformation to α-Cr:Al2O3 during annealing. The α-Cr:Al2O3 synthesized at room temperature acts as the seed or hetero site for nucleation and is responsible for a temperature drop of approximately 200 °C (up to 867 °C). This material is ideal for optics, photonics, defense, energy storage and harvesting, among other strategic applications.

Graphical abstract: Room-temperature synthesis of χ-Al2O3 and ruby (α-Cr:Al2O3)

Back to tab navigation

Publication details

The article was received on 07 Mar 2018, accepted on 21 May 2018 and first published on 21 May 2018


Article type: Paper
DOI: 10.1039/C8CE00360B
Citation: CrystEngComm, 2018,20, 3505-3511

  •   Request permissions

    Room-temperature synthesis of χ-Al2O3 and ruby (α-Cr:Al2O3)

    F. D. Cortes-Vega, W. Yang, J. Zarate-Medina, S. R. Brankovic, J. M. Herrera Ramírez and F. C. Robles Hernandez, CrystEngComm, 2018, 20, 3505
    DOI: 10.1039/C8CE00360B

Search articles by author

Spotlight

Advertisements