KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Prakobsang, Tawipon

Search Results

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Investigation of Contact Angles of SnAgCu Solder Paste Mixed with Graphene Oxide Using Digital Holography Technique
    (2021-01-20)
    Jongjinakool, Kavisra
    ;
    Prakobsang, Tawipon
    ;
    Plaipichit, Suwan
    ;
    Kanlayasiri, Kannachai
    ;
    Kitiwan, Mettaya
    Since lead is a pollutant to the environment, therefore lead-free solder paste compounds have been interested in many research teams. The objective of this research is the investigation properties of solder paste with graphene oxide and reduced graphene oxide. In our experimental method the solder pastes of SnAgCu mixed with graphene oxide with bad electrical conductivity at different concentration by weight of 0.00%, 0.05%, 0.1% and 0.2% respectively. Subsequently, the shape changes of the compounds have been investigated by using digital in-line holography using laser diode wavelength 635 nm as the light source. The solder paste compounds were melted at 250 ± 5 °C and were recorded for every 5 seconds. Then, the contact angles of the melted solder paste compound have been determined using their digital holographic reconstructed images.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    The electrochemical measurements investigation of NiCo2O4for electrode materials of energy storage devices by using digital holography technique
    (2021-01-01)
    Prakobsang, Tawipon
    ;
    Saei, Worawee
    ;
    Kongsubto, Thee
    ;
    Ruttanapun, Chesta
    ;
    Buranasiri, Prathan
    The electrochemical properties of NiCo2O4for using as electrode materials for the potential applications have been investigated by electrochemical measurement which composed of cyclic voltammetry (CV) and galvanostatic chargedischarge (GCD). These processes are generating the ion exchange between the electrode and electrolyte, wherein induce the surface change of the interface. Especially, since in the cycle ability measurement using the potentiostat needed to repeat the cycle into the electrode for many times, the effective of the electrode is reduced. In this research, digital holographic technique was used to investigate the different properties of interface of the NiCo2O4 electrode while operating under the various electrochemical techniques. In our DH recording, the surface change of the electrode was expose at the difference potential scan rate at 1, 5, 10, 50, 100 and 200 mV/s of CV, and the difference current densities at 1, 2, 3, 5, 10 and 20 A/g of GCD and vary times of cycle ability test every 50 cycle times to 1000 cycles. In the end the reconstructed DH images of the electrode have been used to analyze the results from electrochemical measurement.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    The Property Investigation of Solder Mixed with Thermoelectrics Alzno by Using Digital Holography
    (2018-08-10)
    Prakobsang, Tawipon
    ;
    Plaipichit, Suwan
    ;
    Kanlayasiri, Kannachai
    ;
    Buranasiri, Prathan
    In this paper in-line digital holography(DH) technique was used to investigate some properties of solder paste mixed with different percent weight of thermoelectric type AlZnO. By using reconstructed image results different properties of the compound solder pastes i.e. the contact angles, flux thickness were investigated. In addition, their electrical resistance also measured. From our reconstructed image results DH technique plus some computer programming would be one of efficient technique using in electronic industry in the future.