Highly Transparent Yb:Y<sub>2</sub>O<sub>3</sub> Laser Ceramics with High Thermal Conductivity Obtained via a Sintering-Additive-Free Strategy
Fine-grained Yb:Y<sub>2</sub>O<sub>3</sub> laser ceramics with excellent transmittance and thermal conductivity were fabricated from commercial powders. The process involved aqueous colloidal forming, additive-free air pre-sintering at 1400 °C, and hot isostatic pressing at 1...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
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| Series: | Inorganics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6740/13/7/217 |
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| Summary: | Fine-grained Yb:Y<sub>2</sub>O<sub>3</sub> laser ceramics with excellent transmittance and thermal conductivity were fabricated from commercial powders. The process involved aqueous colloidal forming, additive-free air pre-sintering at 1400 °C, and hot isostatic pressing at 1550 °C. Suspensions were prepared with a deionization process to alleviate the hydrolysis issue, which optimizes the microstructure uniformity and enhances the green compacts’ density after consolidation. The microstructure, in-line transmittance, microhardness, and fracture toughness of the Yb<sup>3+</sup>-doped Y<sub>2</sub>O<sub>3</sub> ceramics with different concentrations were measured. The 5.0 at% Yb<sup>3+</sup>-doped Y<sub>2</sub>O<sub>3</sub> ceramic yielded a superior transmittance of 80.1% at 1100 nm and 83.0% in the mid-infrared region. The average grain size was 752 nm. The sample exhibited a thermal conductivity of 9.94 W·m<sup>−1</sup>·K<sup>−1</sup> while achieving a 1076 nm laser output with a 42 mW peak power and 4.3% slope efficiency. |
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| ISSN: | 2304-6740 |