Persons

High-permeability films of CoNiFe triple system form the basis for high-density magnetic data storage. Electrochemical deposition of CoNiFe films, as contrasted with «dry» processes, gives more homogeneous coating with lesser defect level and allows reinforcing the films thickness without stresses. This study investigates the nature of the phenomena taking place at electrochemical deposition of CoNiFe films and leading to the difference in the relative content of the elements in the electrolyte and in the film. The hydrogen exponent of chloride electrolytes was examined in the temperature range of 25-70 °C and electrochemical deposition of CoNiFe films at 70 °C was studied. It was demonstrated that CoCl, NiCl, FeCl salt solutions with concentration from 0,006 to 1 mole/l are characterized by complex process of ion balance formation in single and mixed solutions. The deposition of CoNiFe films was carried out from chloride electrolyte with a component content ratio of 1:1:1 at an average concentration of 0,083 mole/l of each component. It has been established that the content of the component in the film at electrochemical deposition of three-component solution CoCl, NiCl, FeCl with equal concentration of each component did not correspond to the composition of the electrolyte but was closest to the composition of the electrolyte at a decrease in the concentration of each component at high current density.

• Counter: 1480 | Comments : 0

The semiconductor gas sensors with low power consumption have high sensitivity and fast response and their manufacturing technologies permit to reduce the dimensions of the transducer. In production of the semiconductor gas sensors the formation of metal-oxide sensitive layer is an important issue, in particular, the process of combination of the high-porous metal-oxide layer and integrated structures. In the paper, the results of the study on experimental transducers of the composition of gas with porous gas-sensitive layer have been presented. The gas-sensitive layer has been formed by the method of suspension inkjet printing of SnO based suspension with further annealing. The comparison of the sensitivity of the experimental samples of the gas composition transducers with the gas-sensitive layers, formed from two variants of initial suspension: based on pure SnO and SnO doped with Cr and Nb, has been performed. The dependence of variation of conductivity of the gas composition of the integrated transducer specimen on the H concentration in the air has been obtained. It has been found that the gas-sensitive layer based on SnO with Cr and Nb additives has higher sensitivity to changes in the detected gas concentration due to higher effective surface area and suppressed grains agglomeration.

• Counter: 763 | Comments : 0