Submit your paper 
Download Template JOURNAL DETAIL
Heat Treating Blue Sapphire of Pailin, Cambodia
Paper Type  |
Contributed Paper |
Title |
Heat Treating Blue Sapphire of Pailin, Cambodia |
Author |
Kanyarat Kwansirikul, Panjawan Thanasuthipitak, Siwakon Chimnakphant and Opor Saidum |
Email |
kanyarat.k@cmu.ac.th |
|
Abstract: A total of 54 rough blue sapphire samples from Pailin gem field of Cambodia were studied. The samples can be classified into three groups on the basis of their colors and distinct appearance. They consist of trapiche-like blue sapphire, light blue and blue to dark blue groups. The main aim of this study is to study heat treatment process of blue sapphire samples from Pailin gem field of Cambodia. Gemological properties and chemical compositions of these samples are also investigated. For heat treating experiments, the samples were divided into two batches according to the purpose of the heat treatments. Forty-five samples were heated in oxidizing condition to lighten dark blue color of the samples while nine samples were heated in reducing condition to intensify or develop the blue color. The results show that heating at 1200°C can lighten dark blue color and heating over 1400°C can develop or intensify blue color. The UV-Vis-NIR absorption spectra of all samples exhibit Fe3+ absorption peaks, Fe2+/Ti4+ IVCT and Fe2+/Fe3+ IVCT absorption bands. The more intense blue color intensified after heating, the stronger the intensity of Fe2+/Ti4+ IVCT absorption band. The Fe2+/Fe3+ IVCT absorption band probably contributes to the darker tone in the samples. Chemical compositions reveal iron (Fe) and titanium (Ti) are the most significant minor and trace elements because both of them are necessary for the color-causing mechanism in blue sapphire. |
|
Start & End Page |
588 - 600 |
Received Date |
2016-05-26 |
Revised Date |
|
Accepted Date |
2016-10-19 |
Full Text |
Download |
Keyword |
heat treatment, blue sapphire, corundum |
Volume |
Vol.45 No.1 (January 2018) |
DOI |
|
Citation |
Kwansirikul K., Thanasuthipitak P., Chimnakphant S. and Saidum O., Heat Treating Blue Sapphire of Pailin, Cambodia, Chiang Mai Journal of Science, 2018; 45(1): 588-600. |
SDGs |
|
| View:651 Download:1,044 | |
RELATED ARTICLE
Semi-dry Impregnation Method of Rice Starch with Xanthan Gum Prior to Modification by Dry Heat Treatment
page: 429 - 443
Author:Jian Su, Bhakkhawat Laoka, Pathama Chatakanonda, Wirat Vanichsriratana, Klanarong Sriroth, Sirithorn Lertphanich, Sunee Chotineeranat and Kuakoon Piyachomkwan
Vol.48 No.2 (March 2021) View: 740 Download:436
page: 429 - 443
Author:Jian Su, Bhakkhawat Laoka, Pathama Chatakanonda, Wirat Vanichsriratana, Klanarong Sriroth, Sirithorn Lertphanich, Sunee Chotineeranat and Kuakoon Piyachomkwan
Vol.48 No.2 (March 2021) View: 740 Download:436
Prediction of Residual Stresses during Stress-Relief Annealing on Martensitic Stainless Steel AISI 420
page: 312 - 318
Author:Laksamee Angkurarach and Patiphan Juijerm*
Vol.47 No.2 (Special Issue I : March 2020) View: 744 Download:650
page: 312 - 318
Author:Laksamee Angkurarach and Patiphan Juijerm*
Vol.47 No.2 (Special Issue I : March 2020) View: 744 Download:650
Microstructure and Mechanical Properties of As-cast and Heat-treated 935AgCuBeSn Alloys
page: 206 - 214
Author:Siriwan Sakultanchareonchai [a], Torranin Chairuangsri [b] and Ekasit Nisaratanaporn*[a]
Vol.43 No.1 (JANUARY 2016) View: 697 Download:379
page: 206 - 214
Author:Siriwan Sakultanchareonchai [a], Torranin Chairuangsri [b] and Ekasit Nisaratanaporn*[a]
Vol.43 No.1 (JANUARY 2016) View: 697 Download:379
Application of Flow Analysis in Improving Gas Nitriding Conditions in a Vacuum Furnace
page: 909 - 922
Author:Thanaporn Korad*, Mana Ponboon, Niphon Chumchery and John T.H. Pearce
Vol.40 No.5 SPECIAL ISSUE 1 View: 615 Download:224
page: 909 - 922
Author:Thanaporn Korad*, Mana Ponboon, Niphon Chumchery and John T.H. Pearce
Vol.40 No.5 SPECIAL ISSUE 1 View: 615 Download:224
Effect of Isothermal Heat Treatment at 650, 750 and 850°C on the Microstructures of Lean Duplex Stainless Steel S32101 Welds
page: 874 - 885
Author:Zbigniew Brytan* and Jerzy Niagaj
Vol.40 No.5 SPECIAL ISSUE 1 View: 661 Download:218
page: 874 - 885
Author:Zbigniew Brytan* and Jerzy Niagaj
Vol.40 No.5 SPECIAL ISSUE 1 View: 661 Download:218
Energy Conservation and the Application of Renewable Energy: Recommendations for the Heat Treatment Industry in Thailand
page: 805 - 809
Author:Paritud Bhandhubanyong
Vol.40 No.5 SPECIAL ISSUE 1 View: 912 Download:214
page: 805 - 809
Author:Paritud Bhandhubanyong
Vol.40 No.5 SPECIAL ISSUE 1 View: 912 Download:214
Isothermal Phase Transformation Sequence in
Fe-22wt%Cr-3.2wt%Mo-6.2wt%Ni-0.037wt%C Cast
Duplex Stainless Steel
page: 47 - 55
Author:Surasak Kuimalee*[a], John T.H. Pearce [b] and Torranin Chairuangsri**[c]
Vol.38 No.1 (JANUARY 2011) View: 668 Download:211
page: 47 - 55
Author:Surasak Kuimalee*[a], John T.H. Pearce [b] and Torranin Chairuangsri**[c]
Vol.38 No.1 (JANUARY 2011) View: 668 Download:211
Influences of Heat T reatment T emperature on
Drawing Capabilities of Ti-Ni-Cu SMA Wire
page: 529 - 534
Author:Pongpan Kaewtatip* and Anak Khantachawana
Vol.32 No.3 (SEPTEMBER 2005) View: 665 Download:186
page: 529 - 534
Author:Pongpan Kaewtatip* and Anak Khantachawana
Vol.32 No.3 (SEPTEMBER 2005) View: 665 Download:186
Effect of Postweld Heat Treatments on TIG-Welded
Microstructures of Superalloy, IN - 738
page: 320 - 330
Author:Panyawat Wangyao, Weerasak Homkrajai, and Seksak Asavavisithchai
Vol.36 No.3 (SEPTEMBER 2009) View: 629 Download:251
page: 320 - 330
Author:Panyawat Wangyao, Weerasak Homkrajai, and Seksak Asavavisithchai
Vol.36 No.3 (SEPTEMBER 2009) View: 629 Download:251
Gamma Prime Phase Stability after Long-Term
Thermal Exposure in Cast Nickel Based Superalloy,
IN-738
page: 312 - 319
Author:Panyawat Wangyao, Nutthida Chuankrerkkul, Sureerat Polsilapa, Ponlit Sopon and Weerasak Homkrajai
Vol.36 No.3 (SEPTEMBER 2009) View: 644 Download:216
page: 312 - 319
Author:Panyawat Wangyao, Nutthida Chuankrerkkul, Sureerat Polsilapa, Ponlit Sopon and Weerasak Homkrajai
Vol.36 No.3 (SEPTEMBER 2009) View: 644 Download:216
Characteristics of Trapiche Blue Sapphires from
Southern Vietnam
page: 64 - 73
Author:Kanyarat Khotchanin, Panjawan Thanasuthipitak, and Theerapongs Thanasuthipitak
Vol.37 No.1 (JANUARY 2010) View: 652 Download:322
page: 64 - 73
Author:Kanyarat Khotchanin, Panjawan Thanasuthipitak, and Theerapongs Thanasuthipitak
Vol.37 No.1 (JANUARY 2010) View: 652 Download:322
Effect of Vapor Heat Treatment on Chilling Injury and Polyamine Content of ‘Nam Dok Mai’ Mango Fruit
page: 81 - 88
Author:Kanda Whangchai*, Kobkiat Saengnil and Jamnong Uthaibutra
Vol.29 No.2 (AUGUST 2002) View: 629 Download:197
page: 81 - 88
Author:Kanda Whangchai*, Kobkiat Saengnil and Jamnong Uthaibutra
Vol.29 No.2 (AUGUST 2002) View: 629 Download:197
Age Hardening and Precipitation Behavior of an Experimental Cast Al-Mg-Si Alloy Treated by T6 and T6I6 Heat Treatments
page: 269 - 281
Author:Suttawan Imurai, Julatep Kajornchaiyakul, Chachana Thanachayanont, John T.H. Pearce, and Torranin Ch
Vol.37 No.2 (MAY 2010) View: 644 Download:231
page: 269 - 281
Author:Suttawan Imurai, Julatep Kajornchaiyakul, Chachana Thanachayanont, John T.H. Pearce, and Torranin Ch
Vol.37 No.2 (MAY 2010) View: 644 Download:231
Copyrights © Since 2021 All Rights Reserved by Chiang Mai Journal of Science