Thermal Analyzer Sample Container With Smoother Loading Plate
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Solution Overview
Problem
The presence of polishing traces or rough surfaces on the bottom surface of sample containers in thermal analysis interferes with the observation of transparent or translucent samples, making stable observation difficult.
Innovation Solution
A sample container with a loading plate having an average roughness less than the bottom surface, ensuring stable observation by minimizing the influence of the bottom surface roughness, and matching thermal conductivity with the body to maintain consistent thermal behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sample container with a bottom surface is used for thermal analysis, then the container provides structural support and containment, but the roughness of the bottom surface interferes with observation of transparent or translucent samples
Solution Approach 1:
A loading plate is introduced as an intermediary component between the bottom surface of the container and the measurement sample. The loading plate has a smoother surface than the container bottom, and the sample contacts the loading plate rather than the rough bottom surface directly. This mediator transfers the load while providing a smoother optical interface for observation.
Solution Approach 2:
The container structure is segmented into distinct components: the container body with its bottom surface, and a separate loading plate that sits on the bottom surface. This segmentation allows the loading plate to have different surface properties (smoother) than the container bottom, resolving the contradiction between structural support and observation quality.
2Reliability
If the loading plate surface is made very smooth (Ra1 ≤ 0.2 μm) to improve observation, then observation stability increases, but manufacturing complexity increases
Solution Approach 1:
The loading plate applies the smooth surface quality requirement only to the top surface that contacts the sample and is visible during observation. The bottom surface of the loading plate that contacts the container bottom can have less stringent surface requirements, allowing differential manufacturing approaches for different surfaces of the same component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables stable observation of measurement samples regardless of the surface state of the container, particularly for transparent or translucent samples, by suppressing the impact of bottom surface roughness and maintaining consistent thermal conductivity.
Implementation Method 1
the roughness of the bottom surface influences reflective light when observing a sample
Implementation Method 2
thermal conductivity of the loading plate at 25° C. is equal to thermal conductivity of the body at 25° C. with a ±10% margin of error
Data Source
AI summary
A sample container and a thermal analyzer that enable stable observation of measurement samples regardless of the surface state of the sample container in thermal analysis are proposed. The sample container is a sample container used with a thermal analyzer for measurement of thermal behavior according to a temperature variation from heating or cooling of a measurement sample and observation of the measurement sample. The sample container includes a body in a cylindrical shape having a bottom and an open top and a loading plate placed on a bottom surface inside the body on which the measurement sample is to be placed, wherein average roughness of a surface of the loading plate that faces the measurement sample is less than average roughness of the bottom surface.