JP2003257706A - Compensating thermistor composition for making temperature characteristics rectilinear - Google Patents
Compensating thermistor composition for making temperature characteristics rectilinearInfo
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- JP2003257706A JP2003257706A JP2002058247A JP2002058247A JP2003257706A JP 2003257706 A JP2003257706 A JP 2003257706A JP 2002058247 A JP2002058247 A JP 2002058247A JP 2002058247 A JP2002058247 A JP 2002058247A JP 2003257706 A JP2003257706 A JP 2003257706A
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＮＴＣ（Ｎｅｇａｔ
ｉｖｅ Ｔｅｍｐｅｒａｔｕｒｅ Ｃｏｅｆｆｉｃｉｅ
ｎｔ）サーミスタ組成物に係り、特にＢ定数の大きなＮ
ＴＣサーミスタと組み合わせてその出力特性を直線化す
る温度特性補償用のＮＴＣサーミスタ組成物を提供する
ものである。TECHNICAL FIELD The present invention relates to an NTC (Negat).
Ive Temperature Coefficie
nt) Thermistor composition, especially N with large B constant
Provided is an NTC thermistor composition for temperature characteristic compensation, which linearizes the output characteristic in combination with a TC thermistor.
【０００２】[0002]
【従来の技術】ＮＴＣサーミスタは温度が変化するとそ
の抵抗値が負性変化するため、例えば各種温度センサ等
に使用されている。そしてサーミスタの特性を示す定数
としてＢ定数が使用されている。Ｂ定数は温度変化対応
して抵抗値が変化する程度を示すものであり、これが大
きい程いわゆる温度変化に対する感度が良好のものとし
て取り扱われる。2. Description of the Related Art An NTC thermistor is used in various temperature sensors, for example, because its resistance value changes negatively when the temperature changes. The B constant is used as a constant indicating the characteristics of the thermistor. The B constant indicates the degree to which the resistance value changes in response to the temperature change, and the larger the B value, the better the sensitivity to so-called temperature change is treated.
【０００３】[0003]
【発明が解決しようとする課題】ところで、従来のＮＴ
Ｃサーミスタ組成物のＢ定数は、３０００Ｋ〜５５００
Ｋであり、温度に対して抵抗変化がリニアでなく、曲線
である。このため温度測定に際しては、この非直線性を
補正する補償回路を組む必要性があり、高価なものとな
った。By the way, the conventional NT
The B constant of the C thermistor composition is 3000K to 5500.
K, which is a curve in which the resistance change is not linear with respect to temperature. For this reason, when measuring the temperature, it is necessary to form a compensating circuit for correcting this non-linearity, which is expensive.
【０００４】したがって本発明の目的は、高価な温度補
償用回路を使用する必要もなく、しかもワンチップ型
の、温度特性補正用ＮＴＣサーミスタを提供することが
可能なＮＴＣサーミスタ組成物を提供することである。Therefore, an object of the present invention is to provide an NTC thermistor composition capable of providing a one-chip type NTC thermistor for temperature characteristic correction without the need for using an expensive temperature compensating circuit. Is.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するた
め、本発明では、主成分の組成が（Ａｘ・Ｂｙ）Ｏ3 で
表され、
Ａ＝Ｃａ、Ｂａ、Ｓｒの１つであり
Ｂ＝Ｍｎ、Ｃｏ、Ｆｅの１つであり
ｘが０．８≦ｘ≦１．４、ｙが０．６≦ｙ≦１．２でか
つｘ＋ｙ＝２であり、必要に応じて添加物としてＺｎ、
Ｓｍ、Ｃｏ、Ｍｇ、Ａｌ、Ｔｉ、Ｎｉ、Ｙ、Ｚｒ、Ｎ
ｂ、Ｓｎ、Ｌａ、Ｔａ群から選ばれた少なくとも１種以
上を元素換算で合計０．２０ｍｏｌ％まで含有すること
を特徴とする温度特性直線化補償用サーミスタ組成物を
提供するものである。In order to achieve the above object, in the present invention, the composition of the main component is represented by (Ax · By) O 3 , where A = Ca, Ba, Sr and B = One of Mn, Co and Fe, x is 0.8 ≦ x ≦ 1.4, y is 0.6 ≦ y ≦ 1.2 and x + y = 2, and Zn is added as an additive, if necessary.
Sm, Co, Mg, Al, Ti, Ni, Y, Zr, N
The present invention provides a thermistor composition for temperature characteristic linearization compensation, containing at least one selected from the group consisting of b, Sn, La and Ta up to a total of 0.20 mol% in terms of element.
【０００６】そしてこれにより、Ｂ定数が５００Ｋ〜２
５００Ｋと小さな値のＮＴＣサーミスタ組成物を得るこ
とができる。これを従来の３０００Ｋ〜５５００Ｋとい
う大きな値のＮＴＣサーミスタ組成物と接続して使用す
ることにより、温度特性を直線化することができ、しか
もこれらのＮＴＣサーミスタのグリーンシートを積層す
ることによりワンチップ構成とすることができるので、
非常に安価に、使用面積もほとんど増加することなく、
温度特性を直線化することができる。As a result, the B constant is 500 K to 2
NTC thermistor compositions with values as low as 500K can be obtained. By using this by connecting it to a conventional NTC thermistor composition having a large value of 3000K to 5500K, the temperature characteristics can be linearized, and moreover, the green sheets of these NTC thermistors can be laminated to form a one-chip structure. So you can
Very inexpensive, with almost no increase in the used area,
The temperature characteristic can be linearized.
【０００７】[0007]
【発明の実施の形態】本発明の実施の形態を説明する。
出発材料として市販のＣａ、Ｍｎ、Ｃｏ、Ｂａ、Ｓｒ、
Ｆｅ、Ｚｎ、Ｓｍ、Ｍｇ、Ａｌ、Ｔｉ、Ｎｉ、Ｙ、Ｚ
ｒ、Ｎｂ、Ｓｎ、Ｌａ、Ｔａの酸化物を、焼結後の組成
が後掲の表１〜表３に示す通りの組成比になるように秤
量配合し、ボールミルで１６時間湿式混合した。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described.
Commercially available Ca, Mn, Co, Ba, Sr, as starting materials,
Fe, Zn, Sm, Mg, Al, Ti, Ni, Y, Z
The oxides of r, Nb, Sn, La, and Ta were weighed and mixed so that the composition after sintering would be the composition ratios shown in Tables 1 to 3 below, and wet-mixed for 16 hours in a ball mill.
【０００８】その後、脱水乾燥し、乳鉢、乳棒を用いて
粉体にし、これをアルミナ匣鉢に入れ、１０００〜１４
００℃で２時間焼成する。この焼成体をボールミルで微
粉砕後、脱水乾燥し、バインダーとしてポリビニールア
ルコールを加え、乳鉢、乳棒で顆粒に造粒した後、直径
１６ｍｍ、厚さ２．５ｍｍの円板状に加圧成形し、２時
間本焼成して試料を得る。このようにして得られた試料
の両面に銀ペーストをスクリーン印刷し、８５０℃で焼
付けを行い、電極を形成する。After that, it is dehydrated and dried, made into a powder by using a mortar and a pestle, and put into an alumina mortar, and 1000 to 14
Bake at 00 ° C. for 2 hours. This fired product was finely pulverized with a ball mill, dehydrated and dried, polyvinyl alcohol was added as a binder, and the mixture was granulated into granules with a mortar and pestle, and then pressure-molded into a disc shape having a diameter of 16 mm and a thickness of 2.5 mm. A sample is obtained by firing for 2 hours. Silver paste is screen-printed on both surfaces of the sample thus obtained and baked at 850 ° C. to form electrodes.
【０００９】得られた各試料を直流４端子法を用いて２
５℃の抵抗値（Ｒ２５）と８５℃の抵抗値（Ｒ８５）を
測定し、後述の数式１を用いてＢ定数（Ｂ２５／８５）
を算出し、後掲の表１〜表３に示す結果を得た。なお×
印は本発明の範囲外のものであることを示すEach of the obtained samples was subjected to 2
The resistance value at 5 ° C. (R25) and the resistance value at 85 ° C. (R85) were measured, and the B constant (B25 / 85) was calculated by using the following mathematical formula 1.
Was calculated and the results shown in Tables 1 to 3 below were obtained. Note that ×
Mark indicates outside the scope of the present invention
【００１０】[0010]
【数１】 [Equation 1]
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【表２】 [Table 2]
【００１３】[0013]
【表３】 [Table 3]
【００１４】これにより明らかな如く、請求項１の範囲
の組成により、Ｂ定数が５００〜２５００Ｋの低Ｂ定数
のＮＴＣサーミスタ組成物を提供できることがわかる。
主成分はペロブスカイト型結晶構造を有するものであ
り、ｘ＋ｙ＝２であってもｘが０．８未満の場合はＢ定
数が２５００Ｋを超える（Ｎｏ．１、３１、３９、４
７、５５参照）。As is apparent from the above, it is understood that the composition within the range of claim 1 can provide an NTC thermistor composition having a low B constant of 500 to 2500K.
The main component has a perovskite type crystal structure, and even if x + y = 2, the B constant exceeds 2500K when x is less than 0.8 (No. 1, 31, 39, 4).
7, 55).
【００１５】またｘが１．４を超えると、これまたＢ定
数が２５００Ｋを超える（Ｎｏ．５、３５、４３、５
１、５９参照）。When x exceeds 1.4, the B constant also exceeds 2500K (No. 5, 35, 43, 5).
1, 59).
【００１６】ｙが０．６未満の場合は、Ｂ定数が２５０
０Ｋを超える（Ｎｏ．５、３５、４３、５１、５９参
照）。When y is less than 0.6, the B constant is 250.
It exceeds 0K (see No. 5, 35, 43, 51, 59).
【００１７】ｙが１．２を超えると、Ｂ定数が２５００
Ｋを超える（Ｎｏ．１、３１、３９、４７、５５参
照）。When y exceeds 1.2, the B constant becomes 2500.
K is exceeded (see No. 1, 31, 39, 47, 55).
【００１８】添加物の合計量が０．２ｍｏｌ％を超える
と、Ｂ定数が５００Ｋ以下ときわめて小さな値となる
（Ｎｏ．８、１１、１６、２０参照）。When the total amount of the additives exceeds 0.2 mol%, the B constant becomes 500 K or less, which is a very small value (see Nos. 8, 11, 16 and 20).
【００１９】このような低Ｂ定数特性を有する本発明に
よるＮＴＣサーミスタにより、従来の高Ｂ定数特性を有
するＮＴＣサーミスタの温度特性の直線化補償状態につ
いて説明する。The linearization compensation state of the temperature characteristic of the NTC thermistor having the conventional high B constant characteristic by the NTC thermistor according to the present invention having such a low B constant characteristic will be described.
【００２０】図１に示す如く、従来の高Ｂ定数特性を有
するＮＴＣサーミスタ（ＮＴＣ１）と、本発明による低
Ｂ定数特性を有するＮＴＣサーミスタ（ＮＴＣ２）と固
定抵抗Ｒ１とを直列接続し、入力電圧Ｅｉと出力電圧Ｅ
ｏｕｔをそれぞれ測定し、図３〜図７に示す如き特性が
得られた。As shown in FIG. 1, a conventional NTC thermistor (NTC1) having a high B constant characteristic, an NTC thermistor (NTC2) having a low B constant characteristic according to the present invention, and a fixed resistor R1 are connected in series to obtain an input voltage. Ei and output voltage E
Each out was measured, and the characteristics as shown in FIGS. 3 to 7 were obtained.
【００２１】従来のＮＴＣ１と本発明のＮＴＣ２は、図
２に示す如く、例えばＮＴＣサーミスタをグリーンシー
ト２、３としたものに電極Ａｇ−Ｐｄを塗布した。そし
て、これらを複数枚積層焼結し、端子電極４を形成して
得た、１チップタイプの複合型サーミスタＮを構成し
た。In the conventional NTC1 and the NTC2 of the present invention, as shown in FIG. 2, for example, the electrodes Ag-Pd were applied to the green sheets 2 and 3 of the NTC thermistor. Then, a single chip type composite thermistor N obtained by laminating and sintering a plurality of these to form the terminal electrode 4 was constructed.
【００２２】例えば、ＮＴＣ２については、サーミスタ
を構成する出発材料の酸化物を混合、微粉砕したものを
有機溶剤等によりグリーンシートに成形し、Ａｇ−Ｐｄ
電極を塗布してこれを積層する。ＮＴＣ１についても同
様であり、これら積層したものを一体化し、焼結したの
ち端子電極４を形成し、１チップタイプのサーミスタＮ
を得る。For example, with respect to NTC2, a mixture of the starting material oxides forming the thermistor and finely pulverized is molded into a green sheet with an organic solvent or the like, and Ag-Pd is formed.
An electrode is applied and this is laminated. The same applies to the NTC 1, in which these laminated bodies are integrated and sintered to form the terminal electrode 4, and the 1-chip type thermistor N is formed.
To get
【００２３】図３に示す例１では従来のＮＴＣ１とし
て、主成分としてＭｎ２０ｍｏｌ％、Ｎｉ７５ｍｏｌ
％、Ａｌ５ｍｏｌ％の酸化物にＺｒＯ2 を１０重量％添
加したものを使用した。Ｂ２５／８５は４１５０Ｋであ
り、２５℃の抵抗値（Ｒ２５）は５００Ωである。また
低Ｂ定数のＮＴＣ２として、表１のＮｏ．１２に示すＢ
２５／８５が１７４０Ｋのものを使用した。なおＲ２５
は１５００Ωであった。また固定抵抗Ｒ1 として８２０
Ωの抵抗値のものを使用した。In Example 1 shown in FIG. 3, as the conventional NTC1, the main components were Mn 20 mol% and Ni 75 mol.
%, Al 5 mol% oxide to which 10% by weight of ZrO 2 was added was used. B25 / 85 is 4150K, and the resistance value (R25) at 25 ° C is 500Ω. Further, as NTC2 having a low B constant, No. 1 in Table 1 was used. B shown in 12
25/85 used 1740K. R25
Was 1500Ω. Also, as the fixed resistance R 1 , 820
A resistance value of Ω was used.
【００２４】温度を−４０℃から１２５℃まで変化させ
たときのＮＴＣ１及びＮＴＣ２の抵抗値を、図３の特性
線Ａ１、Ｂ１で示す。そして−４０℃〜１２５℃までの
出力電圧Ｅｏｕｔを図３の特性線Ｃ１で示す。この特性
線Ｃ１は直線係数Ｒ2 ＝０．９９９である。直線係数は
Ｒ2 ＝１のとき直線を示す。The resistance values of NTC1 and NTC2 when the temperature is changed from -40 ° C. to 125 ° C. are shown by characteristic lines A1 and B1 in FIG. The output voltage Eout from −40 ° C. to 125 ° C. is shown by the characteristic line C1 in FIG. The characteristic line C1 has a linear coefficient R 2 = 0.999. The linear coefficient shows a straight line when R 2 = 1.
【００２５】図４に示す例２では、従来のＮＴＣ１とし
て、例１と同じＢ２５／８５が４１５０ＫでＲ２５が１
５００Ωのものを使用した。低Ｂ定数のＮＴＣ２として
は、表１のＮｏ．１０に示すＢ２５／８５が５００Ｋの
ものを使用し、Ｒ２５として１５００Ωのものを使用し
た。また固定抵抗Ｒ1 として４２０Ωの抵抗値のものを
使用した。In Example 2 shown in FIG. 4, as the conventional NTC1, the same B25 / 85 as in Example 1 is 4150K and R25 is 1.
The one with 500 Ω was used. As NTC2 having a low B constant, No. 1 in Table 1 is used. B25 / 85 shown in 10 has a value of 500K, and R25 has a value of 1500Ω. A fixed resistor R 1 having a resistance value of 420Ω was used.
【００２６】温度を−４０℃から１２５℃まで変化させ
たときのＮＴＣ１及びＮＴＣ２の抵抗値を、図４の特性
線Ａ２、Ｂ２で示す。そして−４０℃〜１２５℃までの
出力電圧Ｅｏｕｔを、図４の特性線Ｃ２で示す。この特
性線Ｃ２は直線係数Ｒ2 ＝０．９９５である。The resistance values of NTC1 and NTC2 when the temperature is changed from −40 ° C. to 125 ° C. are shown by characteristic lines A2 and B2 in FIG. The output voltage Eout from −40 ° C. to 125 ° C. is shown by the characteristic line C2 in FIG. This characteristic line C2 has a linear coefficient R 2 = 0.995.
【００２７】図５に示す例３では、従来のＮＴＣ１とし
て、例１と同じＢ２５／８５が４１５０ＫでＲ２５が１
００Ωのものを使用した。低Ｂ定数のＮＴＣ２として
は、表１のＮｏ．１３に示すＢ２５／８５が２５００Ｋ
のものを使用し、Ｒ２５として１５００Ωのものを使用
した。また固定抵抗Ｒ1 として４２０Ωの抵抗値のもの
を使用した。In Example 3 shown in FIG. 5, as a conventional NTC1, the same B25 / 85 as in Example 1 is 4150K and R25 is 1.
The one of 00Ω was used. As NTC2 having a low B constant, No. 1 in Table 1 is used. B25 / 85 shown in 13 is 2500K
And R25 was 1500Ω. A fixed resistor R 1 having a resistance value of 420Ω was used.
【００２８】温度を−４０℃から１２５℃まで変化させ
たときのＮＴＣ１及びＮＴＣ２の抵抗値を図５の特性線
Ａ３、Ｂ３で示す。そして−４０℃〜１２５℃までの出
力電圧Ｅｏｕｔを、図４の特性線Ｃ３で示す。この特性
線Ｃ３は直線係数Ｒ2 ＝０．９９５である。The resistance values of NTC1 and NTC2 when the temperature is changed from -40.degree. C. to 125.degree. C. are shown by characteristic lines A3 and B3 in FIG. The output voltage Eout from −40 ° C. to 125 ° C. is shown by the characteristic line C3 in FIG. This characteristic line C3 has a linear coefficient R 2 = 0.995.
【００２９】図６に示す例４では、従来のＮＴＣ１とし
て、例１と同じＢ２５／８５が４１５０ＫでＲ２５が１
５００Ωのものを使用した。低Ｂ定数のＮＴＣ２として
は、表１のＮｏ．８に示すＢ２５／８５が４２０Ｋのも
のを使用し、Ｒ２５として１５００Ωのものを使用し
た。また固定抵抗Ｒ1 として２７０Ωの抵抗値のものを
使用した。In Example 4 shown in FIG. 6, as the conventional NTC1, the same B25 / 85 as in Example 1 was 4150K and R25 was 1.
The one with 500 Ω was used. As NTC2 having a low B constant, No. 1 in Table 1 is used. B25 / 85 shown in 8 was 420K, and R25 was 1500Ω. A fixed resistance R 1 having a resistance value of 270Ω was used.
【００３０】温度を−４０℃から１２５℃まで変化させ
たときのＮＴＣ１及びＮＴＣ２の抵抗値を図６の特性線
Ａ４、Ｂ４で示す。そして−４０℃〜１２５℃までの出
力電圧Ｅｏｕｔを図６の特性線Ｃ４で示す。この特性線
Ｃ４の直線係数はＲ2 ＝０．９９４で小さく直線性があ
まり良くない。しかもＥｏｕｔの変化量が−４０℃〜１
２５℃までの間で１Ｖ未満（正確には表４の例４に示す
如く、０．６７７Ｖ）と小さく、感度が良くない。The resistance values of NTC1 and NTC2 when the temperature is changed from -40 ° C. to 125 ° C. are shown by characteristic lines A4 and B4 in FIG. The output voltage Eout from −40 ° C. to 125 ° C. is shown by the characteristic line C4 in FIG. The linear coefficient of the characteristic line C4 is R 2 = 0.994, and the linearity is not so good. Moreover, the amount of change in Eout is -40 ° C to 1
It is as small as less than 1 V up to 25 ° C. (more precisely, 0.677 V as shown in Example 4 of Table 4) and the sensitivity is not good.
【００３１】図７に示す例では、従来のＮＴＣ１とし
て、例１と同じＢ２５／８５が４１５０ＫでＲ２５が１
００Ωのものを使用した。低Ｂ定数のＮＴＣ２としては
表１のＮｏ．１４に示すＢ２５／８５が２９１０Ｋのも
のを使用し、Ｒ２５として１５００Ωのものを使用し
た。また固定抵抗Ｒ１として４２０Ωのものを使用し
た。In the example shown in FIG. 7, as the conventional NTC1, the same B25 / 85 as in Example 1 is 4150K and R25 is 1.
The one of 00Ω was used. The NTC2 having a low B constant is No. 1 in Table 1. B25 / 85 shown in 14 was 2910K, and R25 was 1500Ω. Further, a fixed resistor R1 having a resistance of 420Ω was used.
【００３２】温度を−４０℃から１２５℃まで変化させ
たときのＮＴＣ１及びＮＴＣ２の抵抗値を図７の特性線
Ａ５、Ｂ５で示す。そして−４０℃〜１２５℃までの出
力電圧Ｅｏｕｔを図７の特性線Ｃ５で示す。この特性線
Ｃ５の直線係数はＲ2 ＝０．９９０であり、直線性がな
いこと明らかである。The resistance values of NTC1 and NTC2 when the temperature is changed from -40.degree. C. to 125.degree. C. are shown by characteristic lines A5 and B5 in FIG. The output voltage Eout from −40 ° C. to 125 ° C. is shown by the characteristic line C5 in FIG. The linear coefficient of this characteristic line C5 is R 2 = 0.990, and it is clear that there is no linearity.
【００３３】なお図３〜図７における−４０℃〜１２５
℃の各特性線の値を表４で示す。-40 ° C. to 125 in FIGS.
Table 4 shows the values of the respective characteristic lines of ° C.
【００３４】これよりＮＴＣ２のＢ定数が２５００Ｋよ
りも大きい場合はＲ2 が０．９９５未満であって出力電
圧に直線性が得られず、また５００Ｋ未満の場合は出力
電圧の変化量が小さく、しかも直線性も良くないことが
わかる。When the B constant of NTC2 is larger than 2500K, R 2 is less than 0.995 and the output voltage is not linear, and when it is less than 500K, the change amount of the output voltage is small. Moreover, it can be seen that the linearity is not good.
【００３５】本発明によれば抵抗体付きＮＴＣサーミス
タチップを複数個並列接続することなく、温度に対する
抵抗値変化を直線化できるので、リニア性の高い複合型
ＮＴＣサーミスタチップを提供できる。According to the present invention, since the resistance value change with temperature can be linearized without connecting a plurality of NTC thermistor chips with resistors in parallel, a composite NTC thermistor chip with high linearity can be provided.
【００３６】積層チップＮＴＣサーミスタ構造のため積
層時にそれぞれのグリーンシートを成形し、一体で焼結
してチップを作製できる。Laminated Chip Due to the NTC thermistor structure, each green sheet can be molded at the time of lamination and sintered together to produce a chip.
【００３７】なお本発明において、Ｃａ：Ｍｎを０．８
ｍｏｌ：１．２ｍｏｌにするとき、その温度−出力電圧
特性を示す特性線を傾度の大きい、つまり感度が良好で
あって、しかも直線性の優れているＢ定数が１８００Ｋ
（表１のＮｏ．２参照）の温度特性直線化補償用サーミ
スタ組成物を提供することができる。In the present invention, Ca: Mn is 0.8.
When the mol is 1.2 mol, the characteristic curve showing the temperature-output voltage characteristic has a large gradient, that is, the sensitivity is good and the linearity is excellent.
The thermistor composition for temperature characteristic linearization compensation (see No. 2 in Table 1) can be provided.
【００３８】また、Ｃａ：Ｍｎを１．０ｍｏｌ：１．０
ｍｏｌとし、添加物としてＣｏ、Ａｌ及びＳｎのいずれ
かを０．１ｍｏｌ％含有させることにより、その温度−
出力電圧特性を示す特性線を傾度の大きい、つまり感度
が良好であって、しかも直線性の優れているＢ定数が１
７４０Ｋ〜１２９０Ｋ（表１．２のＮｏ．１２、Ｎｏ．
２２、Ｎｏ．２８参照）の温度特性直線化補償用サーミ
スタ組成物を提供することができる。Further, Ca: Mn is 1.0 mol: 1.0
mol, and by adding 0.1 mol% of any of Co, Al, and Sn as an additive, the temperature
The characteristic curve showing the output voltage characteristic has a large gradient, that is, the sensitivity is good, and the linearity is excellent.
740K to 1290K (No. 12, No. 12 in Table 1.2).
22, No. 28), the temperature characteristic linearization compensating thermistor composition can be provided.
【００３９】そして、Ｓｒ：Ｆｅを１．０ｍｏｌ：１．
０ｍｏｌとし、添加物としてＺｎを０又は０．１ｍｏｌ
％含有させることにより、感度が良好であって、しかも
直線性の優れているＢ定数が１６１０Ｋ、１３２０Ｋ
（表３のＮｏ．５７、Ｎｏ．６０参照）の温度特性直線
化補償用サーミスタ組成物を提供することができる。Then, 1.0 mol of Sr: Fe: 1.
0 mol, Zn as an additive is 0 or 0.1 mol
%, The B constant with good sensitivity and excellent linearity is 1610K, 1320K.
(See No. 57 and No. 60 in Table 3) The thermistor composition for temperature characteristic linearization compensation can be provided.
【００４０】本発明では、ＮＴＣサーミスタは、その構
造が遷移金属で構成され、特性が類似しており、焼結温
度も一定であり、同じ様な材質のグリーンシートを積層
するので、焼結時の縮率等によるデラミネーション及び
クラックの発生が起きない、すぐれたものが得られる。In the present invention, the NTC thermistor has a structure composed of a transition metal, has similar characteristics, has a constant sintering temperature, and stacks green sheets of the same material. An excellent product is obtained in which delamination and cracks do not occur due to the shrinkage ratio of
【００４１】また積層順番を種々に変更できるので、温
度に対する抵抗値変化を調整することもでき、温度に対
する抵抗値変化のリニア性の精度向上が容易である。Further, since the stacking order can be changed variously, it is possible to adjust the change in resistance value with respect to temperature, and it is easy to improve the accuracy of the linearity of change in resistance value with respect to temperature.
【００４２】このように本発明では、従来のチップ形状
そのままで、温度に対する抵抗値変化のリニアな積層Ｎ
ＴＣサーミスタが提供できる。As described above, according to the present invention, the linear stacking N in which the resistance value changes with temperature while maintaining the conventional chip shape is used.
A TC thermistor can be provided.
【００４３】[0043]
【発明の効果】本発明により、Ｂ定数が５００Ｋ〜２５
００Ｋと小さな値のＮＴＣサーミスタ組成物を得ること
ができる。これを従来の３０００Ｋ〜５５００Ｋという
大きな値のＮＴＣサーミスタ組成物と接続して使用する
ことにより温度特性を直線化することができ、しかもこ
れらのＮＴＣサーミスタのグリーンシートを重ねること
によりワンチップ構成とすることができるので、非常に
安価に、使用面積もほとんど増加することなく、温度特
性を直線化することができる。According to the present invention, the B constant is 500K to 25K.
NTC thermistor compositions with values as low as 00K can be obtained. By connecting this to a conventional NTC thermistor composition having a large value of 3000K to 5500K, the temperature characteristics can be linearized, and the green sheets of these NTC thermistors can be stacked to form a one-chip configuration. Therefore, the temperature characteristic can be linearized at a very low cost with almost no increase in the used area.
【図１】ＮＴＣサーミスタ特性補償接続状態説明図であ
る。FIG. 1 is an explanatory view of an NTC thermistor characteristic compensation connection state.
【図２】ＮＴＣサーミスタの積層状態説明図である。FIG. 2 is an explanatory diagram of a stacked state of an NTC thermistor.
【図３】低Ｂ定数ＮＴＣサーミスタを使用した補償特性
説明図（その１）である。FIG. 3 is an explanatory diagram (part 1) of compensation characteristics using a low B constant NTC thermistor.
【図４】低Ｂ定数ＮＴＣサーミスタを使用した補償特性
説明図（その２）である。FIG. 4 is an explanatory view (No. 2) of compensation characteristics using a low B constant NTC thermistor.
【図５】低Ｂ定数ＮＴＣサーミスタを使用した補償特性
説明図（その３）である。FIG. 5 is an explanatory view (No. 3) of compensation characteristics using a low B constant NTC thermistor.
【図６】低Ｂ定数ＮＴＣサーミスタを使用した補償特性
説明図（その４）である。FIG. 6 is an explanatory view (No. 4) of compensation characteristics using a low B constant NTC thermistor.
【図７】低Ｂ定数ＮＴＣサーミスタを使用した補償特性
説明図（その５）である。FIG. 7 is an explanatory view (No. 5) of compensation characteristics using a low B constant NTC thermistor.
１ 電極 ２、３ グリーンシート ＮＴＣ１ 高Ｂ定数特性を有するＮＴＣサーミスタ ＮＴＣ２ 低Ｂ定数特性を有するＮＴＣサーミスタ Ｎ 複合型サーミスタ 1 electrode A few green sheets NTC1 NTC thermistor having high B constant characteristics NTC2 NTC thermistor with low B constant characteristic N compound type thermistor
フロントページの続き Ｆターム(参考） 4G030 AA07 AA08 AA09 AA10 AA11 AA12 AA13 AA16 AA17 AA20 AA21 AA25 AA27 AA28 AA29 AA32 AA36 AA39 BA06 GA03 GA04 GA08 GA14 GA22 GA27 5E034 BA09 BB01 BC03 BC05 DA07 DB03 DC01 Continued front page F-term (reference) 4G030 AA07 AA08 AA09 AA10 AA11 AA12 AA13 AA16 AA17 AA20 AA21 AA25 AA27 AA28 AA29 AA32 AA36 AA39 BA06 GA03 GA04 GA08 GA14 GA22 GA27 5E034 BA09 BB01 BC03 BC05 DA07 DB03 DC01
Claims (4)
れ、 Ａ＝Ｃａ、Ｂａ、Ｓｒの１つであり Ｂ＝Ｍｎ、Ｃｏ、Ｆｅの１つであり ｘが０．８≦ｘ≦１．４、ｙが０．６≦ｙ≦１．２でか
つｘ＋ｙ＝２であり、 必要に応じて添加物としてＺｎ、Ｓｍ、Ｃｏ、Ｍｇ、Ａ
ｌ、Ｔｉ、Ｎｉ、Ｙ、Ｚｒ、Ｎｂ、Ｓｎ、Ｌａ、Ｔａ群
から選ばれた少なくとも１種以上を元素換算で合計０．
２０ｍｏｌ％まで含有することを特徴とする温度特性直
線化補償用サーミスタ組成物。1. The composition of the main component is represented by (AxBy) O 3 , where A = one of Ca, Ba and Sr and B = one of Mn, Co and Fe and x is 0.8. ≦ x ≦ 1.4, y is 0.6 ≦ y ≦ 1.2, and x + y = 2, and Zn, Sm, Co, Mg, and A are added as additives if necessary.
1, Ti, Ni, Y, Zr, Nb, Sn, La, Ta and at least one or more selected from the group of 0.
A thermistor composition for compensating for linearization of temperature characteristics, which contains up to 20 mol%.
れ、 ｘが０．８、ｙが１．２であることを特徴とする温度特
性直線化補償用サーミスタ組成物。Wherein the composition is represented by (Cax · Mny) O 3, x is 0.8, y is the temperature characteristic linearization compensation thermistor composition characterized in that 1.2.
表され、 ｘが１．０、ｙが１．０であり、 添加物としてＣｏ、Ａｌ及びＳｎのいずれかを０．１ｍ
ｏｌ％含有することを特徴とする温度特性直線化補償用
サーミスタ組成物。3. The composition of the main component is represented by (Cax.Mny) O 3 , x is 1.0 and y is 1.0, and 0.1 m of any one of Co, Al and Sn is added as an additive.
A thermistor composition for temperature characteristic linearization compensation, characterized in that the thermistor composition contains ol%.
表され、 ｘが１．０、ｙが１．０であり、 添加物としてＺｎを０又は０．１ｍｏｌ％含有すること
を特徴とする温度特性直線化補償用サーミスタ組成物。4. The composition of the main component is represented by (Srx.Fey) O 3 , x is 1.0, y is 1.0, and 0 or 0.1 mol% of Zn is contained as an additive. A characteristic thermistor composition for temperature characteristic linearization compensation.
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|---|---|---|---|
| JP2002058247A JP3996411B2 (en) | 2002-03-05 | 2002-03-05 | Composite NTC thermistor |
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