HOLMARC’s Spary Pyrolisis Equipment (Table Top) Model: HO-TH-04 BT is more compact and sleek model that does not take too much space in your laboratory. It can be placed in any available platform. Even though Smaller in size it performs all the functions and operations of the standard model.
Holmarc’s Spray Pyrolysis System has been designed for research laboratories in thin films, especially for solar cell development. The system automates various fatigue and error creating processes involved in the technique when performed manually. Moreover, ergonomically designed chamber provides clean and healthy atmosphere suitable for modern lab conditions.
Parameters like dispensing rate of the solution and speed of spray head movement which are difficult to control manually are controlled precisely by PC based automation. A positive displacement pump controlled by stepper motor and microprocessor is used to dispense solution as per requirement. The spray head movement is also controlled by stepper motor driven linear stages in X and Y direction. The temperature of the substrate heater plate is controlled independently through a dedicated controller.
Spray pyrolysis is a process in which a thin film is deposited by spraying a solution on a heated surface, where the constituent react to form a chemical compound. The chemical reactants are selected such that the products other than the desired compound are volatile at the temperature of deposition. The process is particularly useful for the deposition of oxides and has long been a production method for applying a transparent electrical conductor of Tin oxide (SnO2) or Stannic oxide to glass.
|Dispensing unit capacity||:||50ml & 250ml|
|Dispensing rate||:||1 - 10ml / sec.|
|Drive speed X axis (min-max)||:||10 - 800mm / sec|
|Drive speed Y axis (min-max)||:||1 - 12mm / sec|
|Sprayer traverse||:||X - Y 200mm max.|
|Substrate base plate|
|Dimension||:||150 x 150mm|
|Max. temperature||:||500° C|
|Power input||:||230V, 50Hz|
|PC connectivity||:||Serial port (RS 232)|
Syringe pump is preferable to the glass dispenser for solutions which should be sprayed at lower flow rates (<1ml / min). It works with very low volume of solution as the syringe is directly connected to the spray nozzle, avoiding the use of lengthy tubes which should be filled first before the solution can reach the nozzle.
Ultrasonic Spray Head
The standard spray head which uses a compressed air atomization nozzle can be replaced with the ultrasonic spray head which uses an ultrasonic atomizer nozzle. It breaks the solution by vibrating its nozzle at an ultrasonic frequency (Typically 40 kHz), producing a fine spray of droplets of 50 micron average size.
Glass container holds the solution to be sprayed during the coating process. Containers of two volumes (250ml & 50ml) are available as standard accessories.
This tube carries the solution from the glass dispenser to the spray head. Nylon is resistant to most of the chemicals which has applications in spray pyrolysis.