Method for evaluating performance of AgSnO2 contact material
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A technology of contact materials and evaluation methods, which is applied in the field of determining the optimal performance of AgSnO2 contact materials, and can solve problems such as no relevant description of performance.
Pending Publication Date: 2020-11-17
HEBEI UNIV OF TECH
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The improved entropy weight TOPSIS method based on the gray relational degree is applied to AgSnO 2 There is
Method used
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Embodiment 1
[0109] exist figure 1 On the basis of the hierarchical structure of each evaluation element shown, the required test data is selected as the original data, and the AgSnO 2 / La 2 o 3 The test data of the contact materials are used as the raw data of each evaluation index, and are summarized and sorted out. The results are shown in Table 2.
[0110] Table 2 AgSnO 2 / La 2 o 3 Raw data of each evaluation index of contact material
[0111]
[0112] to AgSnO 2 / La 2 o 3 The raw data of contact materials are processed to obtain a standardized decision matrix X:
[0113]
[0114] Normalize the original data to get the Y matrix:
[0115]
[0116] The calculated entropy value E of each evaluation index is:
[0117] E=[0.894 0.866 0.875 0.872 0.831]
[0118] The entropy weight W of each evaluation index is calculated as:
[0119] W=[0.160 0.202 0.189 0.193 0.255]
[0120] Each column of the standardized decision matrix X is associated with the corresponding weight ...
Embodiment 2
[0138] The difference lies in the types of additives, and the rest are the same.
[0139] Select the required experimental data as the original data, for AgSnO 2 / Bi 2 o 3 The test data of the contact material are used as the raw data of each evaluation index, and are summarized and sorted out. The results are shown in Table 3.
[0140] Table 3 AgSnO 2 / Bi 2 o 3 Raw data of each evaluation index of contact material
[0141]
[0142] to AgSnO 2 / Bi 2 o 3 The raw data of the contact material can be processed to obtain a standardized decision matrix X:
[0143]
[0144] Normalize the original data to get the Y matrix:
[0145]
[0146] The calculated entropy value E of each evaluation index is:
[0147] E=[0.871 0.768 0.720 0.893 0.809]
[0148] The entropy weight W of each evaluation index is calculated as:
[0149] W=[0.137 0.247 0.298 0.114 0.203]
[0150] Each column of the standardized decision matrix X is associated with the corresponding weight w j ...
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Abstract
The invention discloses a method for evaluating performance of AgSnO2 contact material. According to the method, the grey relational degree and an improved entropy weight TOPSIS evaluation method areapplied to quantitative analysis of the performance of the AgSnO2 contact material with single variable change, so that more intuitive, specific and clear overall evaluation is obtained, and an optimal object is selected, so that, the purpose of selecting the optimal value of the performance of the AgSnO2 contact material can be achieved, and the working performance of the AgSnO2 contact materialcan be reflected more accurately. Therefore, the evaluation indexes are established from the perspective of cost consumption for analysis, the entropy weight method is adopted to calculate the weightof each evaluation index, the subjectivity of weight calculation is reduced, the amount of information contained in original data is mined, and the weight of each index is determined more accurately;and relative closeness is calculated by combining the grey correlation degree and the Euclidean distance, sorting is carried out to judge the quality of an evaluated object, the quality grade of the evaluation result is established, so that the quantitative analysis and evaluation on the performance of the AgSnO2 contact are carried out.
Description
technical field [0001] The present invention relates to the determination of AgSnO 2 The method to optimize the performance of the contact material, specifically based on the gray relational degree improved entropy weight TOPSIS method for AgSnO 2 A method to evaluate the performance of contact materials and determine the optimal particle size of additives. Background technique [0002] Electrical contacts are the core components of low-voltage switching appliances, and the reliability of electrical contacts is a key indicator to measure their performance. 70% of the failures in switching appliances are mainly due to the failure of electrical contacts. AgSnO 2 The contact material is a new type of environmentally friendly contact material with excellent performance widely used in low-voltage switchgear, but AgSnO 2 Contact materials generally have defects such as large contact resistance and high temperature rise, which are mainly due to poor wettability between molten si...
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