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Velocity of ultrasound in solid state material



Principle

The velocity of sound in acrylics shall be determined by time of flight reflection technique with an ultrasonic echoscope. The measurements are done by reflection method, on three cylinders of different length. Two measurement series are carried out with ultrasonic probes ...

 
Детали

Продукт No: P5160100

Ultrasonic echography (A-Scan)



Principle

An ultrasonic wave transmitted in a sample will be reflected at discontinuities (defects, cracks). From the relationship between the time of flight of the reflected wave and the sound velocity, the distance between ultrasonic transducer and defects (reflector) can be ...

 
Детали

Продукт No: P5160200

Ultrasonic echography (B-Scan)

Principle

The fundamental principles concerning the generation of ultrasonic B-scan images (brightness representation of the reflection amplitudes) are demonstrated with the aid of a simple test ob-ject. The experiment is executed with an ultrasonic echoscope in the pulse-echo-mode and the ...

 
Детали

Продукт No: P5160300

Detection of discontinuities

Principle
The experiment demonstrates the application and performance of various non-destructive test methods with the aid of ultrasound. A test object with different types of discontinuities is used to perform various detection methods. First, the test object is scanned in order to determine ...

 
Детали

Продукт No: P5160600

Ultrasonic computed tomography

Principle

This experiment explains the fundamental principles of image formation with a CT algorithm. A test object is used to create an attenuation tomogram and a time-of-flight tomogram followed by a discussion of the respective differences.

Benefits

  • Ideal system for education: ...
 
Детали

Продукт No: P5161200

Electric charge

Principle

This experiment shows that positive and negative electrical charge exists. Positive and negative charges cancel each other out

Benefits

Quick and easy experiment for qualitatively understanding of electrostatic phenomena

...
 
Детали

Продукт No: P1432700

Thermal expansion in solids and liquids

Задание

Определить зависимость объемного расширения этилацетата, денатурата, оливкового масла, глицерина и воды от температуры при помощи пикнометра. ...

 
Детали

Продукт No: P2310100

Thermal conductivity of metals

Tasks
  1. Determine the heat capacity of the calorimeter in a mixture experiment as a preliminary test. Measure the calefaction of water at a temperature of 0 °C in a calorimeter due to the action of the ambient temperature as a function of time.
  2. To begin with, establish a constant ...
 
Детали

Продукт No: P2350201

Electrical conductivity of metals

Benefits
  • Easy and precise measurement of the electrical conductivity
  • Compact, easily transportable setup
 
Детали

Продукт No: P2350205

Ferromagnetic hysteresis with Cobra4

Principle

A magnetic field is generated in a ring-shaped iron core by a continuous adjustable direct current applied to two coils. The field strength Η and the flux density B are measured and the hysteresis recorded. The remanence and the coercive field strength of two different iron ...

...

 
Детали

Продукт No: P2430760

Ferromagnetism, paramagnetism and diamagnetism

Principle

The aim of this experiment is to study the behaviour of nickel, tungsten, and bismuth rods in a strong, inhomogeneous magnetic field. This field is formed, for example, between cone-shaped pole pieces that sit on a permanent magnet.
The rods are suspended horizontally on a long and ...

 
Детали

Продукт No: P2430900

Atomic Resolution of the graphite surface by STM (Scanning Tunneling Microscope)

Principle

Approaching a very sharp metal tip to an electrically conductive sample by applying a electrical field leads to a current between tip and sample without any mechanical contact. This so-called tunneling current is used to investigate the electronic topography on the sub nanometer ...

 
Детали

Продукт No: P2532000

Basic methods in imaging of micro and nanostructures with AFM (Atomic Force Microscopy)



Principle

Approaching a sharp silicon tip mounted on a cantilever to a sample surface leads to an atomic scale interaction. The result is a bend of the cantilever which is detected by a laser. In static mode the resulting deflection is used to investigate the topography of the ...

 
Детали

Продукт No: P2538000

Examination of the structure of NaCl monocrystals with different orientations

Principle

The spectra of the X-rays that are reflected with various different orientations by NaCl monocrystals are analysed. The associated interplanar spacings are determined based on the Bragg angles of the characteristic lines.

Tasks

  1. Determine the intensity of the X-rays that ...
 
Детали

Продукт No: P2541301

X-ray investigation of cubic crystal structures / Debye-Scherrer powder method

Principle

When polycrystalline samples are irradiated with X-rays a characteristic diffraction pattern results. These Debye-Scherrer reflections are photographed and then evaluated.

Tasks

  1. Debye-Scherrer photographs are to be taken of powdered samples of sodium chloride and caesium ...
 
Детали

Продукт No: P2541401

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