Anti-boiling sample thermogravimetric analysis device

A thermogravimetric analysis and anti-boiling technology, applied in the field of thermogravimetric analysis, can solve the problems of violent boiling, splashing, and inaccurate test results of the sample, and achieve the effect of timely temperature and accurate judgment

Inactive Publication Date: 2020-11-27
刘翡琼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for samples with an unknown heating temperature curve, if heated according to an inappropriate temperature curve, it is easy to cause the sample to boil violently and generate splashes, resulting in inaccurate test results

Method used

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  • Anti-boiling sample thermogravimetric analysis device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The invention provides an anti-boiling sample thermogravimetric analysis device. Such as figure 1 As shown, the anti-boiling sample thermogravimetric analysis device includes a heating assembly 2, a crucible 3, a mandrel 4, a balance 5, an air inlet 6, an exhaust assembly 7, a light source assembly 8, a detection assembly 9 and The control assembly 10 is arranged outside the chamber wall 1 . The heating assembly 2 forms a furnace, and the crucible 3 is placed in the furnace. The heating assembly 2 includes a resistance wire and a temperature detection assembly. The resistance wire is used to heat the crucible 3 and the samples in the crucible 3. The temperature detection assembly is used to detect the temperature in the furnace. The temperature detection assembly is a thermocouple. The crucible 3 is a porcelain crucible. The ejector rod 4 is arranged at the lower part of the crucible 3 to support the crucible 3 , and the balance 5 is located at the bottom of the ejec...

Embodiment 2

[0020] On the basis of Embodiment 1, the light source assembly 8 includes a continuous spectrum light source. The detection assembly 9 comprises a spectrometer. When the sample is about to boil, as the temperature increases, the particle size on the sample surface gradually increases, changing the corresponding resonance wavelength of the sample particles in the reflection spectrum. Therefore, the use of continuum light, spectrometer and light detector to detect the resonant wavelength of the particles in the reflection spectrum can more accurately determine whether the sample is boiling or will boil, and the detection is more accurate, so that the heating element 2 can be adjusted more precisely to prevent the sample from boiling.

Embodiment 3

[0022] On the basis of Embodiment 2, a transparent glass plate is provided on the upper side of the crucible 3 , and the transparent glass plate is suspended on the upper side of the crucible 3 through the cavity wall 1 . When the sample is about to boil, the particles evaporated from the sample are deposited on the transparent glass plate, which changes the reflection characteristics of the transparent glass plate. By detecting the reflectance spectrum of the transparent glass plate, it is determined whether the sample is boiling or about to boil. Because this embodiment measures the reflection spectrum after the particles are fixed on the transparent glass plate, it has the advantage of high detection accuracy.

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PUM

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Abstract

The invention relates to the technical field of thermogravimetric analysis, and particularly provides an anti-boiling sample thermogravimetric analysis device which comprises a heating assembly, a crucible, an ejector rod, a balance, an air inlet, an exhaust assembly, a light source assembly and a detection assembly arranged in a cavity wall and a control assembly arranged outside the cavity wall.The light source assembly emits light and irradiates a sample in the crucible, the detection assembly detects reflected light of the sample in the crucible, and whether the sample in the crucible isboiled or about to boil is determined according to changes of the reflected light. While the balance is applied to monitor the mass change of the sample in the crucible, an optical means is applied tomonitor whether the sample in the crucible is boiled or about to be boiled, and the method has the characteristics of accurate judgment and timely modulation of the temperature of the heating assembly.

Description

technical field [0001] The invention relates to the technical field of thermogravimetric analysis, in particular to a thermogravimetric analysis device for anti-boiling samples. Background technique [0002] Thermogravimetric analysis refers to the weight loss at a specific temperature or heating process. Thermogravimetric analysis is a standard method for measuring organic, inorganic and synthetic materials. The traditional thermogravimetric analysis method is to heat according to the determined temperature curve, and obtain the test result through weight loss. However, for samples with an unknown heating temperature curve, if heated according to an inappropriate temperature curve, it is easy to cause the sample to boil violently and generate splashes, resulting in inaccurate test results. So it is very important to accurately judge whether the sample is boiling or about to boil, and to adjust the heating temperature. Contents of the invention [0003] In order to solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N21/55
CPCG01N5/04G01N21/55
Inventor 不公告发明人
Owner 刘翡琼
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