High-Temperature Test Fixture With Parallel Noble Metal Electrodes
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Solution Overview
Problem
Conventional testing of material properties at high temperatures is inefficient due to the lack of suitable fixtures for testing electrical properties, particularly at temperatures between 400° C. and 1600° C., where materials' properties significantly vary, and existing test systems lack the necessary equipment for precise high-temperature testing.
Innovation Solution
A high-temperature test fixture comprising at least three noble metal electrodes arranged in parallel, connected by noble metal wires to a test device and a thermocouple for temperature measurement, allowing for simultaneous testing of multiple samples at varying temperatures within the specified range, with adjustable electrode distances and a compact design to enhance testing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional testing processes are used for high-temperature material properties, then heating and cooling periods are required, but this results in low testing efficiency as these periods take up more than 80% of the whole testing period
Solution Approach 1:
The test fixture is divided into multiple independent clamping units (at least three noble metal electrodes arranged in parallel, with two adjacent electrodes forming one clamping unit), allowing simultaneous testing of multiple samples at different temperatures. This segmentation enables parallel testing, significantly reducing total testing time and improving productivity.
2Productivity
If a single test fixture is used for high-temperature testing, then the structure is simple, but it allows only sequential testing of samples which reduces productivity
Solution Approach 1:
Multiple clamping units are merged into a single integrated fixture structure sharing common support components (insulating support, heating element). This merging approach enables simultaneous testing of multiple samples while maintaining structural simplicity and avoiding the need for multiple separate fixtures.
Solution Approach 2:
The fixture design with at least three noble metal electrodes arranged in parallel provides multi-functionality, where the same fixture can simultaneously test multiple samples at different temperatures, and the electrodes can serve both as clamping elements and as temperature sensing points.
3Reliability
If noble metal electrodes are used for high-temperature testing, then reliable electrical property measurements are achieved, but the manufacturing cost increases
Solution Approach 1:
Noble metal electrodes are used specifically at the critical contact points with the test samples where reliable electrical property measurement is most needed. The insulating support and other structural components use less expensive materials, optimizing the balance between measurement reliability and manufacturing cost.
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
The fixture significantly improves testing efficiency by allowing simultaneous testing of multiple samples at different temperatures, reducing the lengthy heating and cooling periods, and providing reliable electrical property measurements across a wide temperature range.
Implementation Method 1
a thermocouple for measuring the temperature of the test materials
Implementation Method 2
noble metal wires connected to the noble metal electrodes at one end, and to a test device at the other end for transmitting test signals generated by the test sample to the test device through the noble metal electrodes
Data Source
AI summary
A high temperature fixture, said fixture comprising: at least three noble metal electrodes arranged in parallel, among which two adjacent noble metal electrodes are used for clamping a test sample; noble metal wires connected to the noble metal electrodes at one end, and to a test device at the other end for transmitting test signals generated by the test sample to the test device through the noble metal electrodes; and a thermocouple for measuring the temperature of the test materials.