TiO2-GeO2 Solid Solution Temperature Measurement
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Solution Overview
Problem
Current methods for measuring temperature in high-pressure and high-temperature industrial processes are limited, as they require extensive modifications and multiple thermocouples to map temperature gradients, which is cumbersome and costly, and do not provide accurate, continuous measurements across the entire cell.
Innovation Solution
A method using a sensor material composed of TiO2 and GeO2, which forms a solid crystalline solution under high pressure and temperature conditions, allowing for ex situ analysis of the composition to determine the maximum temperature experienced during the process, utilizing techniques like electron microprobe analysis, Raman spectroscopy, and X-ray diffraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple thermocouples are used to map temperature gradients, then temperature measurement accuracy is improved, but device complexity and cost increase significantly
Solution Approach 1:
The sensor material (TiO2-GeO2 solid solution) automatically records temperature information through its composition during the HPHT process itself, without requiring external measurement devices. The material's crystal structure naturally incorporates temperature-dependent compositional changes that serve as self-recorded temperature data.
Solution Approach 2:
The patent replaces the mechanical/electrical thermocouple measurement system with a chemical/compositional measurement system. Instead of using thermocouples that require electrical connections and complex mapping, the solution uses chemical composition analysis of the solid solution to determine temperature, substituting a simpler analytical approach.
2Loss of information
If extensive modifications are made to the HPHT cell for temperature mapping, then temperature distribution data is obtained, but ease of operation and process simplicity deteriorate
Solution Approach 1:
The patent extracts the temperature measurement function from the HPHT cell structure itself. By placing a separate sensor material sample in the cell that independently records temperature through its composition, the measurement function is separated from the cell's structural components, avoiding the need for extensive cell modifications.
Solution Approach 2:
The patent changes the measurement parameter from physical temperature reading (requiring thermocouples and electrical systems) to chemical composition analysis. This parameter change allows temperature determination through standard analytical techniques applied to the sensor material after the experiment, simplifying the operational process.
3Reliability
If thermocouples are used for continuous temperature measurement, then real-time temperature data is obtained, but the cost and instrumentation requirements increase
Solution Approach 1:
The sensor material is prepared in advance as a TiO2-GeO2 mixture that will automatically form the solid solution during the HPHT process. This preliminary preparation ensures that the temperature-sensitive material is ready to record data without requiring complex measurement systems during the actual experiment.
Solution Approach 2:
The patent creates a chemical copy of the temperature information stored in the sensor material's composition. The crystal structure of the solid solution preserves temperature data in its compositional ratios, creating a permanent record that can be analyzed later using standard analytical techniques rather than requiring continuous electronic monitoring.
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 accurate and simple measurement of temperature distribution within high-pressure cells without the need for extensive instrumentation, providing reliable data on temperature conditions experienced during industrial processes.
Implementation Method 1
The at least first and second compounds are mixed to form a material sample. The material sample is loaded into a device and the device and material sample are subjected to a high pressure of up to about 7 GPa and a high temperature of up to about 1700°C to form at least part of the material sample into a solid crystalline solution.
Implementation Method 2
The material sample is recovered for analysis and the composition of the crystalline solid solution is measured to determine the temperature ex situ.
Data Source
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AI summary
A method for the measurement of temperature in high temperature and high pressure processes includes the steps of providing at least a first material compound and at least a second material compound. The at least first and second compounds are mixed to form a material sample. The material sample is loaded into a device and the device and material sample are subjected to a high pressure of up to about 10 GPa and a high temperature of up to about 1700 °C to form the material sample into a solid crystalline solution. The material sample is recovered for analysis and the composition of the crystalline solid solution is measured to determine the temperature.