Electromagnetically shielding cement
A technology of electromagnetic shielding and cement, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of no electromagnetic shielding, limited application range, and high cost
Inactive Publication Date: 2006-05-17
祝培华
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Problems solved by technology
However, the existing electromagnetic shielding materials, such as conductive rubber, electromagnetic shielding coating, etc., have high cost and limited application range, while cement, which is low in cost and most widely used in building materials, does not have the performance of electromagnetic shielding
Method used
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Embodiment Construction
[0022] Embodiment First put 4.6kg Portland cement clinker and 0.25kg natural gypsum together for grinding to make a hydraulic cementitious material with better working performance, then add 0.15kg conductive carbon black, and then mix and stir, Finally, electromagnetic shielding cement is made.
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Abstract
The present invention relates to electromagnetically shielding material, and is especially one kind of electromagnetically shielding cement. The technological scheme is that the electromagnetically shielding cement is prepared through grinding the mixture of Portland cement clinker in 60-90 wt% and natural gypsum powder in 3-5 wt% to form hydraulic cement material, and adding conducting carbon black or carbon fiber in 3-30 wt% via stirring to form the electromagnetically shielding cement. The electromagnetically shielding cement in 0.3 cm thickness has electromagnetic shielding effect of 18.1 dB and attenuation higher than 87.6, and the electromagnetically shielding cement has electromagnetic shielding effect and attenuation increased with increased thickness.
Description
technical field [0001] The invention relates to an electromagnetic shielding material, in particular to an electromagnetic shielding cement. Background technique [0002] With the development of electronic technology, the protection of electromagnetic interference and the suppression of electromagnetic radiation have become an urgent problem to be solved. However, the existing electromagnetic shielding materials, such as conductive rubber and electromagnetic shielding paint, have high cost and limited application range, while cement, the most widely used building material with low cost, does not have the performance of electromagnetic shielding. Contents of the invention [0003] In order to overcome the deficiency that the existing cement does not have electromagnetic shielding performance, the purpose of the present invention is to provide a new type of cement with electromagnetic shielding performance, so as to increase the application value of cement, prevent the leaka...
Claims
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IPC IPC(8): C04B7/04H05K9/00
Inventor 祝培华
Owner 祝培华