An optical thermal expansion meter is a powerful testing instrument.
2024-07-12
An optical thermal expansion meter is an instrument specifically designed to measure dimensional changes in materials when they are heated. Its primary functions and testing applications can be summarized as follows:
I. Test Objectives
Optical dilatometers are primarily used to measure the thermal expansion behavior of materials during heating, thereby determining key parameters such as the coefficient of thermal expansion. These parameters are essential for studying the thermal stability and performance changes of materials in materials engineering, civil engineering, and physical experiments.
II. Testing Principle
The operating principle of an optical thermal expansion analyzer is based on the fundamental phenomenon of thermal expansion and contraction. When a material is heated, the thermal motion of its molecules intensifies, causing the material to expand overall. The optical thermal expansion analyzer employs a high-resolution image sensor and a stable optical system to analyze the thermal properties of a sample in real time, capturing images and videos throughout the material’s thermal analysis process.
III. Test Content
1. Changes in Length, Width, and Thickness: An optical thermal expansion meter can precisely measure the changes in a material’s length, width, and thickness during heating.
2. Volume change: By measuring the dimensional changes of a material at different temperatures, its volume change can be calculated.
3. Coefficient of thermal expansion: By considering the temperature change of a material, its coefficient of thermal expansion can be calculated; this is a key physical parameter that characterizes the material’s thermal expansion behavior.
IV. Technical Features
1. Fully non-contact measurement: The optical thermal expansion meter employs a non-contact measurement method, eliminating the errors introduced by contact in conventional dilatometers and thereby enhancing measurement accuracy.
2. High-resolution image sensors and a stable optical system ensure measurement accuracy and reliability.
3. Measurable sintering process: Thanks to its high-temperature microscopy design, the optical thermal expansion analyzer can readily measure the compression and shaping of non-melting solid materials during heating or compaction.
V. Application Areas
Optical thermal expansion meters are widely used in the study of the properties of materials such as glass, ceramics, metals, and plastics. They can be employed to measure the thermal expansion behavior of these materials during heating, as well as to observe and analyze phenomena such as sintering, surface diffusion, and grain-boundary diffusion.
In summary, the optical thermal expansion analyzer is a powerful testing instrument that, thanks to its high-precision measurements and unique testing principle, provides robust support for research in materials science and engineering.
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