Thermal Analysis Crucible Piercing for Contamination Control
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Solution Overview
Problem
Samples in thermal analysis devices are prone to contamination and chemical reactions with ambient air components when the crucible cover is opened for analysis, leading to undefined changes in the sample.
Innovation Solution
A device with a sample chamber, temperature control mechanism, measuring mechanism, gas conveying mechanism, and a piercing mechanism that allows the sample crucible to be introduced with a closed crucible cover, creating a defined gas atmosphere and piercing a hole for analysis without exposing the sample to ambient air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the crucible cover is opened for sample preparation and analysis, then the sample can be analyzed, but the sample becomes contaminated or reacts with ambient air components
Solution Approach 1:
A piercing mechanism with a needle acts as an intermediary to create a controlled opening through the crucible cover. Instead of removing the cover completely, the needle pierces a small hole that allows gas flow and sample access while maintaining the seal integrity, thus preventing contamination during analysis
Solution Approach 2:
The device maintains an inert or controlled gas atmosphere inside the sample chamber. The gas conveying mechanism introduces inert gas through the pierced hole, creating a protective environment that prevents the sample from reacting with ambient air components while still allowing thermal analysis to proceed
2Object-affected harmful factors
If the crucible cover is kept closed to protect the sample, then contamination is prevented, but the sample cannot be analyzed
Solution Approach 1:
The crucible cover is functionally segmented into a main sealing structure and a small pierced opening. This segmentation allows the majority of the cover to remain closed for protection, while a minimal opening is created specifically for analysis purposes, thus resolving the contradiction between protection and accessibility
Solution Approach 2:
The crucible cover maintains its sealing quality across most of its surface area, while a localized small hole is created at a specific position. This local modification allows gas flow and sample access without compromising the overall seal integrity, enabling both protection and analysis
3Object-affected harmful factors
If a glove box chamber is used for sample preparation under vacuum or protective gas, then sample contamination is reduced, but the device complexity increases
Solution Approach 1:
The complex glove box chamber system is extracted and replaced by a simpler integrated solution. The piercing mechanism and gas conveying system are built into the thermal analysis device itself, eliminating the need for a separate glove box while maintaining sample protection through the pierced crucible cover approach
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
Reduces the risk of unwanted chemical or physical reactions by maintaining a controlled gas atmosphere during sample preparation and analysis, minimizing contamination and ensuring precise thermal analysis results.
Implementation Method 1
a gas conveying mechanism for creating a gas atmosphere in the sample chamber
Implementation Method 2
piercing a hole into the crucible cover of the sample crucible by means of the needle when the sample crucible is received in the sample chamber and when the chamber cover is attached to the chamber opening
Implementation Method 3
a temperature control mechanism for controlling the temperature of the sample chamber
Implementation Method 4
a measuring mechanism for measuring a temperature of the sample and one or several further measured variables
Data Source
AI summary
A thermal analysis of samples and proposes a device for a thermal analysis of a sample, having: a sample chamber for receiving a sample crucible including a crucible cover attached thereto, in the interior of which a sample to be analyzed is located, wherein the sample chamber has a chamber opening for introducing the sample crucible into the sample chamber; a temperature control mechanism for controlling the temperature of the sample chamber; a measuring mechanism for measuring a temperature of the sample and one or several further measured variables; a gas conveying mechanism for creating a gas atmosphere in the sample chamber; a chamber cover, which can be attached to the chamber opening of the sample chamber; and a piercing mechanism equipped with a needle, which is suitable to pierce a hole into the crucible cover of the sample crucible by means of the needle when the sample crucible is received in the sample chamber and when the chamber cover is attached to the chamber opening. A corresponding method for a thermal analysis of a sample, a sample crucible including a crucible cover, as well as a covering/piercing unit are further proposed as part of the invention.