Method for fast and comparatively testing flowing capabilities of silicon micro powder materials in laboratory

Abstract

The invention provides a method for fast and comparatively testing the flowing capabilities of silicon micro powder materials in a laboratory. The method comprises the following steps: a silicon micro powder sample and a dispersant are taken through weighing respectively, a beaker is arranged on a stirrer, then the stirrer is started, the dispersant is added into the beaker, and then the silicon micro powder sample is added into the dispersant at a uniform velocity; after the mixture is stirred uniformly, the mixing speed is adjusted to be 900-1,100 r / min, and the stirring time lasts for 10-12mins; a viscosity cup is taken, and an outflow hole in the lower end of the viscosity cup is plugged; the well stirred mixture is poured into the viscosity cup till the cup is full; timing is carrying out as soon as the outflow hole is unplugged, and is finished at the second that the stirred mixture flows out completely; the steps are carried out repeatedly, and a flow time can be obtained by taking the average value of the two lengths; under the same conditions, all the steps are conducted on different silicon micro powder samples, and the obtained flow times are compared; the shorter a flow time is, the better the flowing capability of the corresponding silicon micro powder sample is. The method has the advantages that the detection method is simple; the operability is high; the error in repetitive tests is low; the length of the whole test process is short.

Description

technical field [0001] The invention relates to a method for quickly detecting the fluidity of silicon micropowder, in particular to a method for quickly and comparatively testing the fluidity of silicon micropowder material in a laboratory. Background technique [0002] The fluidity of the powder is related to the shape, size, surface state, density, porosity, etc. of the particles. In addition to the complex relationship between the internal friction and adhesion between the particles, the fluidity of the powder cannot be determined by a single physical property. value to express. There are many forms of powder flow, such as gravity flow, vibration flow, compression flow, fluidized flow, etc., and the corresponding evaluation methods for fluidity are also different. When quantitatively measuring the fluidity of powder, it is best to use The corresponding method (fluidized flow test method is commonly used), but the above-mentioned schemes have problems such as too complic...

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Problems solved by technology

There are many forms of powder flow, such as gravity flow, vibration flow, compression flow, fluidized flow, etc., and the corresponding evaluation methods for fluidity are also different. When quantitatively measuring the fluidity of powder, it is best to use Corresponding method (commonly used fluidized flow test method), but the above-mentioned schemes have problems such as too complicated test method, poor operation repeatability, and accuracy of characterization data