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Wonder what powder characteristics are and why they are important? Have difficulties in tackling powder property measurements? Find out all solutions to your problems about powder characterization, in this helpful tool book written by Bettersize – Powder Characteristics Guidebook.

Dynamic light scattering (DLS), also known as photon correlation spectroscopy (PCS), is a commonly used characterization method for nanoparticles.

When the particle sizing results are different, it should be addressed as the following steps.

During particle sizing, the relative value of shading rate is used to represent the concentration of suspension. The shading rate is determined by the number of particles in the suspension: the more p...

In particle sizing, we often encounter a situation: for the same sample, different instruments could produce different results. Some powder manufacturers and users tend to judge the quality of product...

Four main parameters are used to evaluate the performance of a particle size analyzer:(1) Sensitivity: refers to the change in test results when two samples with very small size difference (e.g., D50 ...

NIB powder has strong magnetic properties and is easy to agglomerate; so cannot be tested by wet dispersion. The dry dispersion can overcome the agglomeration caused by magnetism through the instantan...

Refractive index is the ratio of light speed in vacuum and light speed in other materials. The higher the refractive index of the sample, the greater the refractive ability of incident light.Absorptiv...

In addition to certificated reference materials, many instrument manufacturers also introduced the general reference materials (or working standard materials), which are used for the verification of i...

The calibration of a particle size analyzer can be performed using certificated reference material (CRM) or general reference material (RM).

A laser beam emitted by the laser becomes a parallel beam after filtering, expanding, and quasi value. When no particles are illuminated, the parallel beam passes through the Fourier lens andconverges...

SOP is short for Standard Operation Program. It is now available in smart laser particle sizing instruments, facilitates operation automation and standardization, and is used to achieve 'one-click' operation.

The properties of particles include particle size, shape, surface structure and pore structure. The shape of the particles can impact on many properties of a powder sample.

Shading ratio refers to the percentage of light scattered and absorbed by particles, which is used to represent the optical concentration of suspension in laser particle sizing.

Particle shape, also named as particle morphology, is currently characterized by measuring and calculating the projected shapes of the particles, including outline contour and roughness. All the metho...

'Concentration' displayed in particle size distribution measurement usually indicates the intensity of the received light signals, which is related to the number of particles, usually called 'optical ...

A dispersant is a substance that significantly reduces the surface tension of the medium and hence improves the surface wetting or charged state of the particles.

Mie scattering theory is induced from Maxwell's electromagnetic theory. It describes the analysis to the mechanism of light scattering from a smooth sphere.

Particle agglomeration refers to the aggregation of multiple individual particles under certain conditions. Agglomerated particles are characterized by low binding force and instability.

Resolution is defined as the minimum difference between two samples that can be effectively distinguished by a laser particle size analyzer. As important as repeatability and accuracy, resolution is o...

"Grounding" gives the shell of instrument and the common port terminal zero potential. It has two functions:(1) Improve the instrument stability by enhancing the ability of anti-interference;(2) Ensur...

Background status could help to estimate whether the laser particle size analyzer is running normally. If the background value >4 or the column heights in the histogram are uneven, it indicates poo...

The most commonly used liquid medium in particle sizing is water. Users could choose distilled water, purified water, deionized water, clean tap water, and well water. But no matter what kind of water...

There are two methods to control shading ratio. The first method is multiple sampling: adding small amounts of samples for multiple times and observe the changing of shading ratio. When reach the pre-...

The particle size measurement is a process of characterizing a small amount of sample to represent the whole batch of the product. Therefore, sampling is the first and also the most important step of ...

Helium-neon laser is one of the earliest, most mature and most widely used lasers. The gain medium of the laser, as suggested by its name, is a mixture of helium and neon gases, in approximately a 10:1 ratio, contained at low pressure in a glass envelope.

The commonly used liquid medium for particle sizing are water, anhydrous ethanol, and other organic solvents. For dry dispersion particle sizing, compressed air or compressed nitrogen are commonly used as gas medium.

The distance between the small angle detectors and the detector center is very small (about 100μm). The main beam may deviate from the detector center to the small angle detectors, due to factors suc...

Complete and detailed data: including frequency distribution data and histogram, cumulative distribution data and curve, original parameters, D50, D97 and other 10 typical values, simple distribution table, etc.

There are many factors affecting the resolution of laser particle size analyzers:(1) The more photodetectors there are, the higher the resolution;(2) Inverse algorithm: good inverse algorithm leads to...

Bettersizer S3 Plus laser & imaging particle analysis system combined laser scattering and microscopic imaging for particle sizing and morphology analysis. In terms of particle sizing , the combin...

To have good background status, the laser particle size analyzer should simultaneously satisfy the following five points: low value (1-4), short length (within 20 channels), sloping shape (decreasing ...

As a specialized manufacturer of laser particle size analyzer, Bettersize has made good progress in developing new technologies and obtained dozens of patents over the years. DLOS (dual lens optical s...

Ultra-fine and nano-sized powder materials are the research and production trend of modern powder materials. In order to meet the requirement of measuring these particles, the measurement range of las...

Laser particle size analyser is a professional laboratory instrument. There are many brands on the market with varying performance. The following suggestions may be helpful for users to choose instrum...

In general, particle sizing is realized through the system recognition and reception of optical signals. The intensity of the light signal is determined by the number of particles in the suspension.Ta...

(1) Fast sampling speed: The sampling speed of the laser particle size analyzer reaches 2800 times/second, which can quickly collect the scattered signal, avoiding the signal loss and overlap, improvi...

Semiconductor lasers, also known as laser diode (LD), are one of the most recent developments in semiconductor physics in the 1980s. The advantages of semiconductor lasers are: small volume, lightweig...

(1) Certification and qualification: 'Bettersizer' has obtained CE and 21CFR Part11 certificates. The company has passed the ISO9001 quality system certification.(2) Original dual-lens optical system ...

Background is optical signal formed on the detectors after the laser passed the sample cell with clean medium. The main cause for background signals is laser refraction/reflection when go through air,...

'Bettersizer' series employed new technologies including DLOS (dual-lens optical system), automatic alignment system, SOP, results- conversion, result calibration, dry sampling and dispersion, automat...

Angle of Repose: Under the static balance, the angle between the slope of a powder pile and the horizontal plane is Angle of Repose. It is measured when the powders fall to a surface via gravity and f...

Bettersize laser particle size analyser uses particle size standard material to calibrate the accuracy. There are two types of particle size standard materials:(1) Working standard sample provided by ...

Bulk density: fill the powder sample into a measuring cup, flatten the top, the ratio of the powder mass to the volume of the cup is defined as bulk density. It indicates the mass of the powder that c...

In the latest version of the software of the Bettersize laser particle size analyzer, three modes of analysis are set: "General", "Multi-peak", and "R-R distribution" analysis modes. The "General" mo...

Mesh is the unit to measure the pore size of a sieve, defined as the number of pores per inch in a sieve. The larger the mesh, the smaller the pores. Because the standard in different countries varies...

The refractive indices of different samples and media are different, and the Mie scattering theory is related to the refractive index, so in order to make the test results accurate, the refractive ind...

(1) Instrument: whether the laser, detector, signal transmission system, control system, sampling system, and software work fine.(2) Operation process: background, shading, software parameters, medium...

The software installed in Bettersize laser particle size analyzer includes 17 languages, including English, French, German, Russian, Japanese, Korean, Portuguese, Arabic, Simplified Chinese, Tradition...

For particle sizing instruments, the evaluation of reproducibility is important in several aspects:(1) to understand the long-term stability of the instrument;(2) to evaluate the stability of the samp...

Most of Bettersize laser particle size analyzers use a set of software. When in operation, select "instrument model" window and then click the radio button in front of the instrument model to realize ...

Repeatability and reproducibility are two important factors for particle size analysis. So we must know what is reproducibility? What is the difference between repeatability and reproducibility?Reprod...

Bettersize Instruments Ltd is the leading manufactuer of particle size analyzers in China. Our instruments can meet all your needs for particle size measurement and particle test.Providing services to...

Repeatability is important evidence used to evaluate the current status of the instrument. Good repeatability indicates that all parts of the instrument, including laser, detector, signal transmission...

Several methods are commonly used to measure particle size. These methods include laser diffraction (mm, μm, nm), dynamic light scattering (nm), dynamic and static microscopic imaging (μm, size and ...

D50 is the corresponding particle size when the cumulative percentage reaches 50%. D50 is also called as the median particle diameter or median particle size. For example, for a powder sample with D50...

Particle size is one of the main characteristics of powder materials. It is associated with parameters such as cement reactions in water, attaching strength and coverage of coatings, capacity of lithi...

Particle size indicates how small (or big) a particle is. The unit is usually μm or nm. Mm could also be used for certain fields where the particles are relatively big. Diameter is usually used to de...

Various models of Bettersize laser particle size analyzers have an ‘Automatic Test’ function. Click the ‘Automatic Test’ button and the computer will automatically control the instrument to comple...

Ultrasonic dispersion is an effective means of dispersion commonly used in particle sizing. Bettersize ultrasonic disperser adopts the excitation and frequency tracking technology, stable frequency an...

A micro-sample cell is available for the users of Bettersize laser particle size analyzers. It is mainly used for testing valuable samples(such as diamonds) and samples with organic solvents media.The...

Bettersize laser particle size analyzer software passed the 21CFR Part11 certification. The ‘safety’ menu is the software is designed to meet the certification standard. It includes management autho...

An automatic centering system is installed in all of Bettersize laser particle size analyzers. The function of the automatic centering system is to ensure that the center point of the detector is alwa...