Effect of Mass Fraction of Ni in Solution on the Microstructure and Sensitivity of Cu/Ni Film as Low-Temperature Sensor

Abstract

The purpose of this research is studying microstructure, the resistivity of Cu/Ni film produced by electroplating on the various mass fraction of Ni in the electrolyte. Then the film is tested for its performance as a temperature sensor. The electrolyte solution was made from mixing of NiSO 4 , NiCl 2 , H 3 BO 3 , and H 2 O. Plating was conducted on power 1.5 V and 60°C bath temperature. The results showed deposits containing Ni and NiO. The X-ray diffraction parameters of Ni[111] and NiO[111] such as intensity, d-spacing and grain size on variations of Ni mass fraction in solution followed the parameters diffraction of Cu[111]. The resistivity is contributed by competition between those three diffraction parameters. Testing Cu/Ni films for sensing the temperature of liquid nitrogen (0°C to-140°C) shows that all samples have exhibited their performance as low-temperature sensors. The temperature has a linear relationship to the output voltage of the sensor with the sensitivity ranging from 0.7510-3 V/°C to 1.0510-3 V/°C. The highest sensitivity in accordance to the sample produced from 8.83 g Ni in the electrolyte.

Investigation on Effect of Solution Temperature on The Structure of Cu/Ni Layer in The Electroplating Assisted withParallel Magnetic Field

“…Salah satu metode pembuatan sensor suhu rendah dengan jenis RTD (Resistance temperature detector) dapat menggunakan elektroplating. Metode elektroplating dipilih dikarenakan metode ini lebih murah dan mudah (Boylestad, 2014 ;Toifur et al, 2019). Elektroplating digunakan untuk menumbuhkan *corresponding Author: mtoifur@yahoo.com http://www.jurnal.unsyiah.ac.id/JAcPS lapisan berbentuk flim Ni pada permukaan Cu menjadi Cu/Ni (Lukoseet al, 2016).…”

“…Sehingga mencegah pembentukkan lapisan yang rapuh dengan kehadiran gelembung di dalam lapisan. Sedangkan suhu berfungsi mengencerkan larutan maka semakin mudah bagi ion untuk menembus larutan ke arah katoda dan membentuk endapan (Toifur et al, 2019). Kemudian bantuan medan magnet sejajar membantu pembentukkan struktur nanokomposit dengan tekstur yang lebih kuat (Gu et al, 2017).…”