Related Experiment Video
Updated: Feb 6, 2026
08:39
Simulating Temperature in a Soil Incubation Experiment
Published on: October 28, 2022
3.6K
Experiments on Temperature Changes of Microbolometer under Blackbody Radiation and Predictions Using Thermal Modeling
Yu-Zhen Deng1, Shiang-Feng Tang2, Hong-Yuan Zeng3
1Department of Electrical and Electronic Engineering, Chung Cheng Institute of Technology, National Defense University, Taoyuan 33000, Taiwan. jcoh185@gmail.com.
Sensors (Basel, Switzerland)
|August 12, 2018
Summary
This study simulates heat transfer in microbolometer devices. L-type 2-leg microbolometers show a larger temperature difference (ΔT) than 4-leg designs, indicating potential for improved thermal isolation in infrared detection.
Area of Science:
- Thermal Engineering
- Materials Science
- Optics
Background:
- Microbolometers are crucial for infrared imaging.
- Understanding heat transfer is key to optimizing microbolometer performance.
- Vanadium oxide is a common material for microbolometer sensing elements.
Purpose of the Study:
- To simulate and analyze heat transfer in novel L-type microbolometer designs.
- To compare the thermal performance of 2-leg versus 4-leg microbolometer structures.
- To investigate the effect of structural modifications on temperature distribution.
Main Methods:
- Utilized COMSOL Multiphysics for heat transfer modeling.
- Simulated microbolometer devices with vanadium oxide membranes and Si₃N₄ supporting films.
- Analyzed temperature changes under blackbody radiation.
Main Results:
- Simulated temperature trends align with experimental resistance changes.
- Nominal 2-leg microbolometers exhibited a larger ΔT (≈ 17 mK) compared to 4-leg designs.
- 4-leg microbolometers showed a smaller ΔT (≈ 5 mK) due to higher thermal conductance.
Conclusions:
- The 2-leg microbolometer design offers superior thermal isolation.
- 4-leg designs provide higher thermal conductance, impacting temperature differentials.
- Simulation results provide a basis for optimizing microbolometer thermal management.
Related Concept Videos
01:11Temperature and Thermal Equilibrium
9.5K
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
9.5K
02:59Biological Effects of Radiation
18.0K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
18.0K
02:27Predicting Molecular Geometry
46.0K
VSEPR Theory for Determination of Electron Pair Geometries
46.0K
01:17Radiation: Applications
1.8K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
1.8K
02:55Temperature Dependence on Reaction Rate
89.2K
The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
The collision theory is based on the postulates that (i) the reaction rate is proportional to the rate of reactant collisions, (ii) the reacting species collide in an orientation allowing contact between...
89.2K
01:27Thermal expansion and Thermal stress: Problem Solving
2.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
2.2K