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Method and system for measuring axial resistivity of beta ''-Al2O3 ceramic tube

A measurement method and measurement system technology, which is applied in the direction of measurement device, measurement of electrical variables, measurement of resistance/reactance/impedance, etc., to achieve accurate measurement results

Pending Publication Date: 2021-11-16
浙江安力能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For mass production of β″-Al 2 o 3 ceramic tube, there is no simple and easy way to measure β″-Al 2 o 3 Axial resistivity of ceramic tube

Method used

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  • Method and system for measuring axial resistivity of beta ''-Al2O3 ceramic tube
  • Method and system for measuring axial resistivity of beta ''-Al2O3 ceramic tube
  • Method and system for measuring axial resistivity of beta ''-Al2O3 ceramic tube

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A β″-Al 2 o 3 The measuring method of axial resistivity of ceramic tube comprises the following steps,

[0045] S1. Graphite coating configuration:

[0046] Weigh NaNO 3 、NaNO 2 , graphite powder and water, according to NaNO 3 、NaNO 2 The mass ratio of graphite powder and water is 14.25:9.25:15:22.5, and stirred evenly to form a slurry. The purity of NaNO3 and NaNO2 is analytically pure and above. The purity of graphite powder is chemically pure or above, the residue on ignition is not more than 0.15%, and the particle content of particle size ≤ 30 μm is not less than 95%.

[0047] S2. Sample preparation:

[0048] S21 Use a high-precision cutting machine to cut 12-16mm from the middle of the sample to ensure that the cut is smooth and free of burrs, wash it, dry it in an oven at 80°C for 1 hour, and then cool it in the oven to room temperature. Grind the cut two end faces with 600 mesh sic sandpaper on a grinding and polishing machine to ensure that the end fac...

Embodiment 2

[0063] A β″-Al 2 o 3 The measurement system for the axial resistivity of ceramic tubes includes a waveform generator, a test fixture, a reference resistor, a data collector, a high-temperature furnace, and a computer. The waveform generator is connected in series with the test fixture and the reference resistor to form a loop.

[0064] The test fixture as figure 1 As shown, it includes an upper platen 1, a lower platen 2, a mica sheet 3, a copper sheet 4, a graphite foil 5, and a short screw 6. The lower pressing plate 2 is provided with a pair of short screw rods 6, and a mica sheet 3, a copper sheet 4, a graphite foil 5, a graphite foil 5, a red copper sheet 4, a mica sheet 3, and an upper pressing plate 1 are placed in sequence; the sample 6 Placed between the graphite foils 5, the axial end of the sample 7 is connected to the graphite foil 5; the mica sheet 3 is placed on the lower platen 1, and is provided with an opening for matching with a pair of short screws 6; the...

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Abstract

The invention relates to a method for measuring the axial resistivity of a beta ''-Al2O3 ceramic tube, which comprises the following steps: graphite coating preparation: weighing NaNO3, NaNO2, graphite powder and water, and uniformly stirring and mixing to form slurry; sample preparation: taking a sample, cutting, cleaning, drying, cooling to room temperature, and polishing; measuring mass, length and density; cleaning, fully coating the two cut sections of the sample with graphite paint, and drying; loading the sample into a test fixture; placing the assembled sample and the temperature thermocouple in a high-temperature furnace, and closing a furnace door; and connecting a circuit to set temperature rising parameters of the high-temperature furnace and test and record data. The measuring method and system are easy and convenient to operate, easy to implement, low in equipment requirement and accurate in result. The method and the system are used for measuring the axial resistivity of the beta ''-Al2O3 ceramic tube, whether the conductivity of the Na-beta''-Al2O3 solid electrolyte is qualified or not can be rapidly and qualitatively judged, and the method and the system are rapid, efficient, simple and easy to implement.

Description

technical field [0001] The invention relates to the field of sodium-nickel battery measurement, in particular to a β″-Al 2 o 3 Method and system for measuring axial resistivity of ceramic tubes. Background technique [0002] Both sodium-nickel batteries and sodium-sulfur batteries are high-temperature energy storage batteries, the negative electrode is liquid Na, and the electrolyte is solid β″-Al 2 o 3 Ceramic tube, sodium ions migrate between the positive and negative electrodes through the ceramic electrolyte during charging and discharging. β″-Al 2 o 3 The sodium ion conductivity of ceramic tubes at high temperatures is a measure of β″-Al 2 o 3 The most important indicator of the electrochemical performance of ceramic tubes. By measuring β″-Al 2 o 3 The axial resistivity of ceramic tubes can be used to quantitatively characterize β″-Al 2 o 3 Sodium ion conductivity of ceramic tubes. For mass production of β″-Al 2 o 3 ceramic tube, there is no simple and ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/08
CPCG01R27/08
Inventor 石再军杨贞胜王震辉刘三李伟伟
Owner 浙江安力能源有限公司