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1)  positive temperature coefficient characteristic
正温度系数特性
2)  PTC ceramic thermistor ρ-T curve
正温度系数热敏陶瓷阻-温特性曲线
3)  temperature characteristic coefficient
温度特性系数
1.
The dimensional analysis method was employed to build an empirical equation of the drying constant k,which are function of drying temperature,sample quality,stem length,medium velocity and initial moisture content,and the functional relation between the temperature characteristic coefficient n and drying temperature was obtained.
应用量纲分析方法,建立了苜蓿的干燥温度、样品质量、茎秆长度、介质流速和初始含水率与其干燥常数k的经验公式,并得到了温度特性系数n与干燥温度的函数关系,提出了改进苜蓿薄层干燥方程,为分析干燥条件对苜蓿干燥速度的影响提供了理论依据。
4)  positive temperature coefficient
正温度系数正温度系数
5)  positive temperature coefficient
正温度系数
1.
The friction and wear behaviour and the positive temperature coefficient (PTC) characteristic of the composites were investigated.
采用共混法制备了以低密度聚乙烯为基体的含碳黑的导电复合材料 ,考察了导电复合材料的摩擦磨损性能及正温度系数特性 ,同时探讨了导电复合材料的摩擦熔融现象对其摩擦磨损性能的影响 。
2.
When the sensor is forward biased at a current of 2 mA, the range of positive temperature coefficient of the sensor resistance is extended up to +300 C as a result of the minority current discontinuity and majority carrier injection.
当传感器在2mA的正向偏置电流下,由于少数载流子的不连续性以及多数载流子的注入,传感器电阻的正温度系数(PTC)区拓宽到573K(+300℃)以上。
3.
The Ni/(Ba,Sr)TiO3 positive temperature coefficient(PTC) composite with low resistivity was sintered in two kinds of reducing atmospheres.
在两种还原气氛中烧结制备低阻Ni/(Ba,Sr)TiO3复合正温度系数(positive temperature coefficient,PTC)材料,通过X射线光电子能谱仪研究复合材料表面镍的存在价态。
6)  PTC
正温度系数
1.
A new series of composites exhibiting a large positive temperature coefficient (PTC)of resistivity effect have been prepared by incorporating YBa_2Cu_3O_(7-x) particles into polyethylene matrix.
一类新型PTC复合材料的制备及性能杜伟坊,杜海清(湖南大学材料科学及应用化学研究所,长沙,410082)关键词正温度系数,聚乙烯,YBa_2Cu_3O_(7-x)具有正温度系数(PTC)的材料在其转化温度附近具有电阻率大幅度上升的特点,因而在温度检测与?。
2.
The packaging materials and processes of positive temperature coefficient (PTC) devices made up of the composite of polyethylene and carbon black(PE/CB) for over current protection were studied.
用环氧和有机硅树脂涂料对由聚乙烯/炭黑(PE/CB)制备的正温度系数(PTC)电路保护元件的表面处理及其工艺进行了研究。
3.
Materials of low PTC can be obtained by diffusing Mn into n-type Si.
对n型硅掺锰,得到的是小正温度系数热敏材料,其B值在620 K左右;对p型硅掺锰,得到的是负温度系数热敏材料,其B值在4 200 ~4300 K之间。
补充资料:正温度系数热敏陶瓷阻-温特性曲线
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CAS号:

性质:描述正温度系数热敏陶瓷电阻率与温度关系的曲线。钛酸钡基PTC热敏陶瓷阻-温特性曲线。电阻率随着温度的升高,先是降低,当达到某一值Tmin时,曲线出现极值,经过极值后电阻率随温度升高而急剧上升,此时对应的温度Tb称为开关温度。电阻率随温度上升达到最大值时所对应的温度为Tm。经过Tm后,阻温特性曲线发生弯曲,电阻率开始逐步降低,此时对应的温度为Tp。温度处于Tb至Tm之间时,热敏陶瓷呈现正温度系数(PTC)特性。其电阻温度系数αT= ,式中Rb,Rp为Tb,Tp温度下的相 应零功率电阻值。αT大于10%/℃,为开关型热敏陶瓷电阻器。αT小于10%/℃,为缓变型热敏陶瓷电阻器。

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