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Related Experiment Video

Updated: Jun 17, 2026

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
07:37

TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method

Published on: April 26, 2017

Glass-ceramics for high precision reflective-optic applications.

D A Duke, G A Chase

    Applied Optics
    |January 14, 2010
    PubMed
    Summary
    This summary is machine-generated.

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    Transparent glass-ceramics suitable for large mirror blanks were developed using titania- and zirconia-nucleated Li(2)Al(2)O(4)-SiO(2) glasses. These materials exhibit very low thermal expansion, crucial for precision optics applications.

    Area of Science:

    • Materials Science
    • Glass-Ceramics Technology
    • Optical Engineering

    Background:

    • Development of advanced materials for large optical components like mirror blanks is critical.
    • Traditional glass materials may not meet stringent requirements for thermal stability and low expansion.
    • The Li(2)Al(2)O(4)-SiO(2) system offers potential for creating novel glass-ceramics.

    Purpose of the Study:

    • To investigate the suitability of titania- and zirconia-nucleated glasses in the Li(2)Al(2)O(4)-SiO(2) system for casting large mirror blanks.
    • To characterize the resulting glass-ceramics, focusing on their thermal expansion, transparency, and structural uniformity.
    • To address processing challenges associated with large-scale fabrication.

    Main Methods:

    • Casting of large mirror blanks using titania- and zirconia-nucleated Li(2)Al(2)O(4)-SiO(2) glasses.

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    TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
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    Published on: April 26, 2017

    Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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  • Controlled heat treatment to induce crystallization into beta quartz solid solution.
  • Characterization of thermal expansion coefficients, optical transparency, and internal strain.
  • Evaluation of processing parameters for thick ware fabrication.

    • Main Results:

    • Uniform crystallization was achieved, yielding transparent glass-ceramics.
    • Achieved average expansion coefficients of 0 +/- 0.3 x 10(-7)/°C over a temperature range of 5-50°C.
    • Successfully processed ware up to 15 cm thick with less than 10 micro/cm strain.
    • Demonstrated consistent properties (expansion, transparency) throughout thick blanks.

    Conclusions:

    • Titania- and zirconia-nucleated Li(2)Al(2)O(4)-SiO(2) glass-ceramics are suitable for large mirror blank fabrication.
    • The developed materials offer excellent thermal stability and transparency.
    • Processing insights were gained for the fabrication of very large castings, addressing challenges of exothermic crystallization.