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Updated: Dec 31, 2025
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Synthesis of Non-uniformly Pr-doped SrTiO3 Ceramics and Their Thermoelectric Properties
Published on: August 15, 2015
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Study on strontium doped tricalcium silicate synthesized through sol-gel process.
Wai-Ching Liu1, Chih-Chien Hu2, Yuan-Yun Tseng3
1Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei, Taiwan.
Summary
Strontium-doped tricalcium silicate bone cement was synthesized via sol-gel. This advanced material shows promising mechanical strength, favorable biocompatibility, and potential for bone restoration.
Area of Science:
- Biomaterials Science
- Materials Chemistry
- Orthopedic Engineering
Background:
- Tricalcium silicate (Ca3SiO5) based bone cements are widely used in orthopedic applications.
- Enhancing the properties of bone cements, such as mechanical strength and biocompatibility, is crucial for improved bone restoration outcomes.
- Strontium doping is a potential strategy to modify the characteristics of calcium silicate cements.
Purpose of the Study:
- To synthesize and characterize strontium-doped tricalcium silicate (Sr_xCa_3-xSiO5) bone cement.
- To evaluate the effects of strontium doping on the material properties, including setting time, mechanical strength, and bioactivity.
- To assess the in vitro biocompatibility of the developed bone cement.
Main Methods:
- Sol-gel process was employed for the synthesis of Sr_xCa_3-xSiO5 bone cement with varying strontium concentrations (0-2 mol%).
- Material characterization included assessment of crystallinity, setting time, mechanical strength (compressive strength), and hydration products.
- Bioactivity was evaluated by immersion in simulated body fluid (SBF) and observing apatite layer formation.
- In vitro biocompatibility was assessed using L929 cell viability assays.
Main Results:
- All synthesized slurries exhibited setting times under 70 minutes, with 0.5 mol% Sr doping reducing the final setting time by 20 minutes.
- The highest compressive strength of 45 MPa was achieved with 0.25 mol% Sr doping after 14 days of curing, comparable to undoped Ca3SiO5.
- Formation of an apatite layer on the material surface after SBF immersion confirmed bioactivity.
- Proliferation of L929 cells was significantly promoted in the presence of 1 mol% Sr-doped cement compared to the undoped control.
Conclusions:
- Strontium-doped tricalcium silicate (Sr_xCa_3-xSiO5) bone cement synthesized via sol-gel exhibits tunable properties.
- The material demonstrates appropriate mechanical strength and enhanced biocompatibility, with potential for improved bone regeneration.
- This novel strontium-doped bone cement holds promise for applications in bone restoration procedures.
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