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Microwave thermogravimetric analysis device and combined system

A thermogravimetric analysis and analysis system technology, which is applied in the direction of removing certain components and weighing, can solve the problems that the combination of analysis equipment is rarely involved, and achieve the effects of enriching material composition information, high degree of automation, and convenient operation

Active Publication Date: 2017-05-31
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the current practical application, there are already some microwave thermogravimetric analysis devices, and the reported ones are all stand-alone operations, and their combined use with related analysis equipment is rarely involved.

Method used

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  • Microwave thermogravimetric analysis device and combined system
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Embodiment 1

[0047] figure 1 It is a schematic structural diagram of the microwave thermogravimetric analysis device and the combined system of the present invention. figure 2 Shown is a top view of the microwave thermogravimetric analysis device used in the microwave thermogravimetric analysis device and the combined system of the present invention. Specifically, 101 is a protective gas cylinder, 102 is a gas flowmeter, 103 is a reaction gas cylinder, 104 is a gas flowmeter, 105 is a protective gas channel, 106 is the outer shell of the microwave resonance cavity, 107 is the microwave resonance cavity, 108 For the waveguide outlet, 109 is a high-temperature heat-resistant insulation material 109, 110 is a reactor (quartz reaction bottle), 111 is a reaction gas pipeline, 112 is an outlet pipe insulation tube, 113 is a support (quartz support), 114 is a precision electronic balance, 115 116 is a combined analysis system, 117 is a computer, 118 is an infrared thermometer, and 119 is a micr...

Embodiment 2

[0062] This embodiment provides a microwave thermogravimetric analysis device and a combined system, which uses microwave heating to conduct thermal analysis on materials, and uses an electronic balance 114 to record real-time mass changes in the heating process of materials, and at the same time conduct online analysis on the escaped gas during thermal analysis , to obtain more material composition information.

[0063] Specifically, the microwave thermogravimetric analysis device and the combined system include: a microwave generator 119 is installed on the back of the device, and microwaves are transmitted to the stainless steel microwave resonant cavity 107 through a waveguide. The waveguide outlet 108 is slightly higher than the center of the material, and adopts The quartz glass or polytetrafluoroethylene plate is connected and sealed with the stainless steel microwave resonant cavity 107 . The microwave input power is 0-5kW, controlled by PLC, the microwave output power...

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Abstract

The invention provides a microwave thermogravimetric analysis device and combined system which comprises a microwave heating system, a temperature control system, a quality monitoring system and an external combined system. A microwave generator is arranged on the back of the device, and microwaves are transmitted to a stainless steel microwave resonator cavity through a waveguide. The temperature of a sample is monitored in real time by adopting an infrared thermometer, and the microwave output power is regulated, so that the set temperature needs are met. A through hole is formed in the bottom of the stainless steel cavity and connected with a lower electronic scale through a hollow cylindrical quartz tube; and the top end of a quartz tube bracket stretches into the stainless steel cavity. A quartz reaction bottle is arranged on the quartz bracket, the opening of the quartz reaction bottle penetrates through the stainless steel cavity, and the quartz reaction bottle is connected into a sample injection pipeline of the combined analysis system after valve diversion so as to perform online real-time analysis. The system disclosed by the invention is simple in structure and convenient to operate, microwave thermogravimetric analysis under different conditions can be obtained, thermogravimetric gas sample loss is effectively avoided, and complete sample composition information can be obtained.

Description

technical field [0001] The invention relates to a thermogravimetric analysis device, in particular to a microwave thermogravimetric analysis device and a combined system. Background technique [0002] Thermogravimetric analysis refers to a thermal analysis technique that measures the relationship between the mass of the sample to be tested and the temperature change under program-controlled temperature. It is used to study the thermal stability and composition of materials, and is an important method for studying material characteristics and reaction laws. Traditional thermogravimetry usually uses electric heating, which is external heating. There is a certain temperature gradient between the environment and the center of the material. There is a certain error in replacing the material temperature with the ambient atmosphere temperature. For thermal analysis of larger materials, the test results have greater deviations. [0003] Microwave heating has the advantages of immedi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 孙予罕罗虎孔令照鲍利伟唐志永
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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