Systhesizing SnTe nanocrystals leading to thermoelectric performance enhancement via an ultra-fast microwave hydrothermal method

Fact Snapshot

• Paper: Systhesizing SnTe nanocrystals leading to thermoelectric performance enhancement via an ultra-fast microwave hydrothermal method
• Equipment: XH-8000 / XH-8000Plus
• Source: Nano Energy, 2016
• Research direction: microwave hydrothermal synthesis, thermoelectric materials, SnTe nanocrystals, and particle-size-effect control
• Core conditions: Temperature 220 °C, Microwave power 550 W, Pressure 0.17 MPa / 4.0 MPa, and Time 20 min
• Key results: Average particle size 165 nm, Average particle size 8.2 μm, Ultra-low thermal conductivity 0.60 W m^-1 K^-1, and Total thermal conductivity 0.60 W m^-1 K^-1

Research Abstract

Systhesizing SnTe nanocrystals leading to thermoelectric performance enhancement via an ultra-fast microwave hydrothermal method was published in Nano Energy (2016) and is indexed as a Xianghu Q1 application case for XH-8000 / XH-8000Plus. The source record connects it with microwave hydrothermal synthesis, thermoelectric materials, SnTe nanocrystals, and particle-size-effect control. Core operating conditions include Temperature 220 °C, Microwave power 550 W, Pressure 0.17 MPa / 4.0 MPa, and Time 20 min. Key reported results include Average particle size 165 nm, Average particle size 8.2 μm, Ultra-low thermal conductivity 0.60 W m^-1 K^-1, and Total thermal conductivity 0.60 W m^-1 K^-1.

Research Background and Problem

Equipment Use and Experimental Conditions

Key Result

Evidence Details

Mechanism / Method Highlights

• Microwave hydrothermal heating plus stirring supports ultrafast and more uniform reaction; continuous magnetic stirring in the microwave hydrothermal system helps complete the reaction within 20 min.
• The nanometer-size effect strengthens phonon scattering. When the particle size is reduced to about 165 nm, refined grains, more grain boundaries, and point defects strongly lower thermal conductivity, which is a decisive contributor to ZT improvement.
• The nanoscale energy-filtering effect also contributes to the Seebeck coefficient; even without a large power-factor jump, the sharply reduced thermal conductivity improves the final ZT. Builds a clear particle-size, thermal-conductivity, and ZT performance chain from micrometer-scale to nanometer-scale SnTe particles.

Application Value

• Uses the XH-8000 microwave hydrothermal system to compress the key SnTe synthesis step to 20 min.
• Builds a clear particle-size, thermal-conductivity, and ZT performance chain from micrometer-scale to nanometer-scale SnTe particles.
• The 165 nm sample reaches an ultra-low thermal conductivity of 0.60 W m^-1 K^-1 at 803 K.
• The maximum ZT rises to 0.49, about 2.3 times that of the mechanically alloyed reference sample.
• Preserves quantitative result evidence: Average particle size 165 nm, Average particle size 8.2 μm, Ultra-low thermal conductivity 0.60 W m^-1 K^-1, and Total thermal conductivity 0.60 W m^-1 K^-1.

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Related Equipment

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