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Thermistor sintered body and temperature sensor element

A technology of thermistors and heat-sensitive elements, which is applied in the direction of resistors, electrical elements, and thermometers using electric/magnetic elements that are directly sensitive to heat, and can solve problems such as inability to detect temperature correctly

Inactive Publication Date: 2020-07-07
SHIBAURA ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A thermistor is a component that detects temperature based on a change in resistance value, and if the resistance value becomes too low, it becomes impossible to detect temperature correctly

Method used

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  • Thermistor sintered body and temperature sensor element
  • Thermistor sintered body and temperature sensor element
  • Thermistor sintered body and temperature sensor element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] Next, the thermistor sintered body of the present invention will be described based on examples.

[0107] Prepare the raw material powder with the following average particle size, according to the above-mentioned production process, produced the powder with Figure 5 Thermistor sintered bodies of various compositions shown in . These thermistor sintered body in Y(Cr, Mn)O 3 Both Cr and Mn are contained in a phase. In this table, No.1 represents the basic composition in this example that does not contain rare earths other than Y, Nos.2 to 5 are samples containing Pr, Nos.6 to 9 are samples containing Y, and Nos. Nos. 10 to 13 are samples containing La, and Nos. 14 to 17 are samples containing Ce.

[0108] For the sample, pre-firing was set at 1000° C. for 24 hours, and sintering was set at 1500° C. for 24 hours, and both were performed in the air.

[0109] Y 2 o 3 Powder: 0.1μm Pr 2 o 3 Powder: 0.1μm La 2 o 3 Powder: 0.1μm

[0110] CeO 2 Powder: 0.1μm Cr 2 o...

Embodiment 2

[0116] Next, make a Figure 7 Thermistor sintered bodies of various compositions shown in . The raw material powder used and the manufacturing process are the same as in Example 1. exist Figure 7 Among them, Group A and Group B contain Y(Cr, Mn)O as in Example 1. 3 Phase is the thermistor sintered body as the subphase, but the basic chemical composition other than Pr is different from that of Example 1. In addition, in Figure 7 Among them, Group C contains YCrO 3 phase as the secondary phase of the thermistor sintered body.

[0117] For each of the obtained sintered bodies, the B constant was determined in the same manner as in Example 1. show the result in Figure 8 (group A), Figure 9 (Group B) and Figure 10 (Group C).

[0118] Such as Figure 8 and Figure 9 As shown in , containing Pr and Y(Cr,Mn)O 3 The thermistor sintered body whose phase constitutes the secondary phase has a small change in the B constant with respect to the amount of increase in the sp...

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Abstract

To provide a thermistor sintered body and a temperature sensor element such that a resistance value can be adjusted in a wider range while minimizing the effect on a B constant. [Solution] This thermistor sintered body comprises a sintered body which includes a Y2O3 phase as a main phase and a Y(Cr / Mn)O3 phase as a subphase. The chemical composition of Cr, Mn, Ca, Pr, and Y excluding oxygen comprises one or both of Cr: 20 mol% or less and Mn: 20 mol% or less, Ca: 1 to 15 mol%, and Pr: 0.5 to 30 mol%, the balance being unavoidable impurities and Y. In the present invention, preferably, the subphase is a Y(Cr,Mn)O3 phase or a YCrO3 phase, and Pr is soluble in the Y(Cr,Mn)O3 phase or the YCrO3 phase.

Description

technical field [0001] The invention relates to a thermistor sintered body and a temperature sensor element used in a temperature sensor. Background technique [0002] Conventionally, a temperature sensor using a thermistor whose resistance value (hereinafter simply referred to as resistance value) changes according to temperature as a thermal element has been widely used. The characteristics of a thermistor are generally expressed by the resistance value and the temperature coefficient of resistance (temperature dependence of the resistance value). The resistance value characteristics of a thermistor vary depending on the material constituting the element, and various materials that exhibit resistance value characteristics according to the purpose of use have been developed. [0003] The average temperature coefficient of resistance (hereinafter referred to as B constant) is obtained by the following formula. [0004] B=(lnRm-lnRn) / (1 / Tm-1 / Tn) [0005] Rm: resistance val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/04C04B35/505G01K7/22
CPCG01K7/22H01C7/04C04B35/505H01C7/043H01C7/06H01C17/06533C04B2235/3225H01C7/045
Inventor 竹内彰孝新关尚宏
Owner SHIBAURA ELECTRONICS CO LTD
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