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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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Related Experiment Video

Updated: May 5, 2026

Preparation of Large-area Vertical 2D Crystal Hetero-structures Through the Sulfurization of Transition Metal Films for Device Fabrication
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High-Performance MoSi2-20 mol % Mo5Si3 Composite Ceramics: Sintering Preparation, Experimental Characterization, and

Yajie Yu1, Yongxin Hu1, Haisheng Ren2

  • 1Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China.

Inorganic Chemistry
|May 4, 2026
PubMed
Summary

This study enhances molybdenum disilicide (MoSi2) ceramics by adding Mo5Si3, improving room-temperature properties and high-temperature oxidation resistance for extreme applications.

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Area of Science:

  • Materials Science
  • Ceramic Engineering
  • High-Temperature Materials

Background:

  • Molybdenum disilicide (MoSi2) ceramics offer excellent high-temperature properties but suffer from room-temperature brittleness.
  • Brittleness limits the application of MoSi2 in demanding environments.
  • Advanced processing is needed to overcome MoSi2 limitations.

Purpose of the Study:

  • To enhance the physical and mechanical properties of MoSi2.
  • To improve MoSi2 by incorporating reinforcing phases and using high-temperature, high-pressure sintering.
  • To develop MoSi2-based composites for extreme environments.

Main Methods:

  • Preparation of MoSi2-20 mol% Mo5Si3 composite ceramic samples.
  • Sintering at a constant pressure of 4.5 GPa between 1100-1300 °C.
  • Characterization of density, hardness, fracture toughness, thermal/electrical properties, and oxidation resistance.

Main Results:

  • High relative density achieved in the composite ceramic samples.
  • Superior Vickers hardness (15.358 GPa) and fracture toughness (6.497 MPa·m1/2).
  • Excellent high-temperature oxidation resistance with no significant mass gain at 1500 °C in air.

Conclusions:

  • High-temperature, high-pressure sintering of MoSi2-Mo5Si3 composites yields superior properties.
  • The developed material demonstrates potential for aerospace and defense applications.
  • This research offers a new pathway for high-performance MoSi2-based ceramics.