Intelligent Powder Physical Property Tester (BT-1001)

group name: Laser Particle Size Analyzer

Min Order: 1 piece

model: BT-1001

Nearest port for product export: Ningbo

Delivery clauses under the trade mode: FOB, CFR, CIF, EXW, CIP, DDP, Express Delivery

Acceptable payment methods: T/T, L/C, PayPal

Export mode: Have the independent export and import right

update time: Mon, 28 Oct 2013 13:11:47 GMT

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Briefing

Powder property is the basic characteristic of powder materials.

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Test items

Angle of repose: In static equilibrium, the slope of natural powder accumulation and bottom level forms an acute angle which is called the angle of repose. This angle is formed by free falling powder down to a particular platform under the electromagnetic vibration mode. Angle of repose directly reflects the powder's flowability, the smaller the angle is, the better the flowability is. The bigger the angle is, the worse the flowability is. Angle of repose is also called the rest angle or natural angle of slope.

Collapse angle: In the process of measuring the angle of repose, the accumulation of powder is hit by an external shock, and then collapse phenomenon occurs on the surface of powder accumulation. After collapse, the slope of powder accumulation and bottom level will form an acute which is called collapse angle. The smaller the collapse angle is, the better the flowability is.

Difference Angle: the difference of angle between angle of repose and collapse angle is called difference angle. The bigger the difference angle is, the stronger the splashing property is.

Flat plate angle: After lifting up vertically the flat plate that is buried in natural powder accumulation, an angle A will be formed between the free surface (slope) of powder accumulation on the flat plate and horizontal plane. An angle B will be formed after external shock. The average value of angle A and B is called flat plate angle. The smaller the flat plate angle is, the stronger the flowability is. Generally, flat plate angle is bigger than the angle of repose. Flat Angle is also called spatula angle.

Tap density: Fill a specific container with certain weight (or volume) of powder, and then vibrate the container with specific intensity, frequency for certain period of time, so that the gap between the particles is compressed, and particles are in a tight state. The powder density at this time is called tap density.

Bulk density: refers to the density that powder is filled in particular container in a natural state.

Compressibility: refers to the ratio of the difference of the tap density and bulk density of powder to its tap density. The smaller the compressibility is, the better the flowability is. Compressibility is also called the compression ratio.

Dispersity: after casting a certain amount of powder from a specific height, percentage of amount of powder scattered outside the collecting tray of the total powder is called dispersity. Dispersity is the scattering degree for the powder in the air. Dispersity has relation with powder's dispersibility, scattering property and splashing property. If the dispersity is more than 50%, it means that the sample has a strong tendency to scatter.

Voidage: refers to the percentage of the gaps in the powder of the total volume of powder. Voidage varies due to the difference of powder particle shape, arrangement of structure, particle size, etc. For spherical particles, voidage of powder is about 40%; for superfine or irregular shape particles, voidage is 70-80% or higher.

Uniformity: refers to the ratio of the D60 and D10 calculated by particle size distribution which is obtained through sieving method. Generally, it is used for coarse powder with less coherence.

Agglutination degree: it is a kind of powder's characteristics showed during sieving process, and is an explanatory measurement index for the internal stress of particles. The bigger the degree of agglutination is, the worse the flowability of powder is. Agglutination degree is applicable to fine powder or micro powder with tendency of easy aggregation.

Flowability index: it is a weighted sum of the angle of repose, compressibility, flat plate angle, uniformity or agglutination degree, etc. Flowability index has relation with compressibility.

Jet flow Index: is a weighted sum of flowability index, collapse angle, difference angle, dispersity and so on.