Nondestructive in situ thermoluminescence using CO(2) laser heating

Area of Science:

• Materials Science
• Analytical Chemistry
• Physics

Background:

• Conventional thermoluminescence (TL) measurements often require destructive sampling of ceramic materials.
• Existing methods necessitate sample removal and preparation, potentially altering material properties.
• There is a need for non-invasive techniques to analyze the thermoluminescent properties of bulk ceramics.

Purpose of the Study:

• To develop and demonstrate a non-destructive method for obtaining thermoluminescence glow curves from large, solid ceramic samples.
• To compare laser-induced thermoluminescence with conventional methods.
• To validate the theoretical basis of laser-induced thermoluminescence in ceramic analysis.

Main Methods:

• Utilized laser spot heating for non-destructive thermoluminescence analysis.
• Applied the technique to large, solid ceramic samples, including LiF, silica, and porcelain.
• Recorded and analyzed thermoluminescence glow curves generated by laser heating.

Main Results:

• Successfully obtained thermoluminescence glow curves from brittle ceramic samples without visible damage.
• Experimental glow curves generated by laser heating demonstrated excellent agreement with theoretical predictions.
• The laser-induced method proved effective for materials like LiF, silica, and porcelain.

Conclusions:

• Laser-induced thermoluminescence is a viable and non-destructive alternative for analyzing ceramic materials.
• This method overcomes the limitations of conventional techniques by preserving sample integrity.
• The findings support the application of laser thermoluminescence for accurate material characterization.