Non-contact magnetic temperature sensor for biochemical applications

Osada, Hiroyuki; Chiba, S.; Oka, Hideo; Hatafuku, H.; Tayama, Norio; Seki, Kazuhiko

doi:10.1016/j.jmmm.2003.12.989

Cited by 8 publications

(4 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ferrites materials are comparatively economical for preparation of various types of sensors to probe, such as magnetic field 12 , current 13 , gas concentrations [14][15] , heat treatment 16 and mechanical stresses 17 , and. Ferrite temperature sensors used in biochemical applications [18][19][20][21] . Main reasons of being ferrite samples are attracting researchers due to it's their high resistivity, applicability at higher frequency and higher corrosion resistance that makes them highly important for high frequency applications.…”

Section: Introductionmentioning

confidence: 99%

Influence of pH Variation on Structural and Magnetic Properties of Ni-Zn Ferrite Nanoparticles Synthesized by Auto Combustion Method

Tyagi¹,

Ahlawat²

2017

Orient. J. Chem

View full text Add to dashboard Cite

Nickel zinc ferrite (Ni 0.5 Zn 0.5 Fe 2 O 4 ) nanoparticles were synthesized via solution auto ignition combustion method. The ferrite samples were synthesized with different pH values 3, 5, 7 and 8. The as synthesized samples were calcined at 800 o C for 4 hours. These synthesized nanopowder have been characterized by XRD, SEM and VSM and effect of pH value on the properties of the ferrite samples were studied. XRD pattern confirmed that samples were crystalline in nature. Crystallite size of ferrite powder increased with increase in basic nature of ferrite nanopaticles. Crystallite size of sample was found 24.86nm, 28.10nm, 33.51nm and 39.61nm at pH values 3, 5, 7 and 8 respectively. The magnetization of samples prepared at different pH values 3, 5, 7 and 8 were found 55.490e.m.u./g, 61.420e.m.u./g, 65.541e.m.u./g and 66.512e.m.u./g respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of pH Variation on Structural and Magnetic Properties of Ni-Zn Ferrite Nanoparticles Synthesized by Auto Combustion Method

Tyagi¹,

Ahlawat²

2017

Orient. J. Chem

View full text Add to dashboard Cite

show abstract

“…Ferrite temperature sensors for biological applications have been developed, which can monitor human body temperature [7] and also have biochemical applications [8,9].…”

Section: Introductionmentioning

confidence: 99%

EVALUATION OF A Ni-Zn FERRITE FOR USE IN TEMPERATURE SENSORS

Brito¹,

Almeida²,

Hirata³

et al. 2010

PIER Letters

View full text Add to dashboard Cite

Abstract-This work investigates the variation of the real part of the complex magnetic permeability of a Ni-Zn ferrite for application to temperature sensors. Ferrite samples were fabricated by means of the conventional ceramic method. Zinc, nickel and iron oxides were used as raw materials. The samples were sintered at 1200, 1300, and 1400 • C. The complex magnetic permeability of the samples was measured at temperatures ranging from −40 • C to +50 • C. The complex magnetic permeability of the samples was analyzed in the 100 kHz-100 MHz frequency range, and the temperature sensitivity of the magnetic permeability (∂µ r /∂T ) was analyzed at 100 kHz. The magnetic permeability variation of the ferrite permits to use it as a temperature transducer with a maximum temperature sensitivity of about −119 • C −1 . The highest magnitudes of temperature sensitivity occurred between +30 • C and +50 • C. Therefore, the ferrite could be sensitive enough to allow temperature measurements at the human body temperature level.The results indicate that the temperature range of maximum temperature sensitivity of the ferrite may be adjusted by means of appropriate selection of the fabrication parameters.

show abstract

“…This appears to cover, however, a somewhat limited range of temperatures. For special biochemical applications, where minute temperature changes, down to 0.01 • C, ensuing from enzymatic reactions are to be sensed, the temperature dependent flux pattern surrounding, inside the gap of a yoke, a thin ferrite film with Curie temperature close to room temperature is detected by means of a magnetoimpedance element [4]. A remote temperature sensing device has also been proposed, where three magnetic layers are packaged in a sensor, whose resonance frequency, tracked by wireless interrogation, can provide reversible and non-reversible temperature threshold indication as well as continuous (nonlinear) temperature readout in the range 20-80 • C [5].…”

Section: Introductionmentioning

confidence: 99%