The present disclosure relates to a negative temperature coefficient product comprising an electrically conductive percolation network of printable NTC material as particles in a cross-linked dielectric polymer matrix and to a method of manufacturing thereof. The particles comprising a spinel phase, preferably a C-spinel phase, having a general formula M.sub.3O.sub.4 comprising at least a first metal M.sup.I that is manganese and second metal M.sup.II that is nickel. In addition the particles include a nickel oxide phase. The printable NTC material can be dispersed in a printable NTC ink comprising a dispersant, from which the NTC product, e.g. a thermistor, can be formed, e.g., after drying of the dispersant. During processing the ink is kept at a temperature below 300° C. Optionally, the spinel phase comprises a further metal M.sup.III. The weight fraction of nickel oxide with respect to the overall mass of the printable NTC material is preferably in a range between one and twenty weight percent.

A thermistor that includes: a base layer containing a resin component; a thermistor layer on the base layer, wherein the thermistor layer is a composite which includes a plurality of particles including a metal oxide containing at least one first metal element that is at least one of Mn and Ni, and an amorphous phase between the plurality of particles and which contains the same metal element as the first metal element; two electrodes, wherein the two electrodes include at least one second metal element selected from the group consisting of Cu, Al, Ag, and Ni; and a bonding layer between the two electrodes and the thermistor layer, the bonding layer comprising the composite, the second metal element, and the resin component.

Solution-processed negative temperature coefficient (NTC) thermistor devices include transition metal dichalcogenide (TMDC) quantum dots. The TMDC quantum dots may be formulated into an ink, and the ink may subsequently be deposited on a substrate and processed to form an NTC thermistor. Solution-processed NTC thermistors may be incorporated into RFID tags or as circuit protectors into electronic circuits.

Provided is a thermistor sintered body which stably provides a desired B constant even if a composition deviation of an additive element has occurred. The thermistor sintered body-includes a Y.sub.2O.sub.3 phase and a YMnO.sub.3 phase, wherein a chemical composition of Cr, Mn, Ca and Y excluding oxygen includes Cr: 3 mol % or less (while including 0%), Mn: 5 to 18 mol %, Ca: 1 to 18 mol %, and Sr: 1 to 25 mol %, with the balance being unavoidable impurities and Y. In the thermistor sintered body, Ca and Sr may be dissolved in the YMnO.sub.3 phase.

A temperature sensor element consists of a temperature sensing unit including: a temperature-sensing ceramic unit; first and second electrodes respectively positioned on first and second surface of the temperature-sensing ceramic unit, the second surface opposing the first surface; first and second intermediate electrodes respectively connecting to the first and second electrodes; and first and second lead lines connected to the first and second electrodes via the first and intermediate electrodes, respectively; and a protective unit surrounding the temperature sensing unit, wherein each of the first lead line and the second lead line includes a lead line core coated with a second layer, the lead line core and the second layer being different materials. The lead lines consist of the lead line cores of a metallic material cheaper than the platinum-based metal, which reduces the production cost of the lead lines.

An NTC component comprising a first electrode (1) and a second electrode (2) is specified. The NTC component further comprises an NTC element (3) disposed between the first electrode (1) and the second electrode (2), wherein the NTC element (3) comprises a ceramic having the general composition AB.sub.2O.sub.4, and where A and B each comprise one or more of the materials Mn, Ni, Co and Cu, and B additionally comprises one or more of the materials Fe, Y, Pr, Al, In, Ga and Sb.

A temperature sensor that includes an organic-inorganic composite negative temperature coefficient thermistor and a transistor. The organic-inorganic composite negative temperature coefficient thermistor includes a thermistor layer which includes spinel-type semiconductor ceramic composition powder containing Mn, Ni and Fe and an organic polymer component, and a pair of electrode layers. The semiconductor ceramic composition powder has a molar ratio of Mn to Ni of 85/15≥Mn/Ni≥65/35 and a Fe content of 30 parts by mole or less when a total molar amount of Mn and Ni is regarded as 100 parts by mole, and has a peak with a local maximum value of around 29° to 31° in its X-ray diffraction pattern, a half width of which peak is 0.15 or more. The transistor is electrically connected with either one of the pair of electrode layers.

A thermistor sintered body and a temperature sensor element that can adjust a resistance value in a wider range while suppressing an influence on a B constant. A thermistor sintered body of the present invention includes: a Y.sub.2O.sub.3 phase as a main phase; and a Y(Cr/Mn)O.sub.3 phase as a subphase, wherein a chemical composition of Cr, Mn, Ca, Pr and Y excluding oxygen includes one or two of Cr: 20 mol % or less and Mn: 20 mol % or less, Ca: 1 to 15 mol %, and Pr: 0.5 to 30 mol %, with the balance being unavoidable impurities and Y. In the present invention, preferably, the subphase is a Y(Cr,Mn)O.sub.3 phase or a YCrO.sub.3 phase, and Pr is dissolved in the Y(Cr,Mn)O.sub.3 phase or the YCrO.sub.3 phase.

A thermistor element includes: a thermistor film; a first electrode provided in contact with one surface of the thermistor film; and a pair of second electrodes provided in contact with an other surface of the thermistor film, wherein the thermistor film is provided to cover a periphery of the first electrode.

A thermistor sintered body and a temperature sensor element that can adjust a resistance value in a wider range while suppressing an influence on a B constant. A thermistor sintered body of the present invention includes: a Y.sub.2O.sub.3 phase as a main phase; and a Y(Cr/Mn)O.sub.3 phase as a subphase, wherein a chemical composition of Cr, Mn, Ca, Pr and Y excluding oxygen includes one or two of Cr: 20 mol % or less and Mn: 20 mol % or less, Ca: 1 to 15 mol %, and Pr: 0.5 to 30 mol %, with the balance being unavoidable impurities and Y. In the present invention, preferably, the subphase is a Y(Cr,Mn)O.sub.3 phase or a YCrO.sub.3 phase, and Pr is dissolved in the Y(Cr,Mn)O.sub.3 phase or the YCrO.sub.3 phase.