THE RESISTANCE-TEMPERATURE COEFFICIENT OF CONCENTRATED SOLUTIONS OF POTASSIUM IN LIQUID AMMONIA AND THE SPECIFIC CONDUCTANCE OF SOLUTIONS OF POTASSIUM IN LIQUID AMMONIA AT INTERMEDIATE CONCENTRATIONS

1923 ◽  
Vol 45 (11) ◽  
pp. 2551-2555 ◽  
Author(s):  
Charles A. Kraus ◽  
Walter W. Lucasse
Keyword(s):  
Temperature Coefficient ◽  
Liquid Ammonia ◽  
Specific Conductance ◽  
Concentrated Solutions ◽  
Resistance Temperature Coefficient

Influence of Al2O3 Doping on the Microstructure and Current–Voltage Characteristics of ZnO-Based Linear Resistance Ceramics

2011 ◽  
Vol 480-481 ◽  
pp. 556-559
Author(s):  
Jian Feng Zhu ◽  
Yong Zhou ◽  
Hai Bo Yang ◽  
Fen Wang
Keyword(s):  
Electrical Properties ◽  
Temperature Coefficient ◽  
Raw Materials ◽  
Nonlinear Coefficient ◽  
Al2o3 Content ◽  
Linear Resistance ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Resistance Temperature Coefficient ◽  
Al2o3 Doping

ZnO-based linear resistance ceramics were synthesized using Al2O3 doped ZnO-based system as raw materials by sintered at 1340 °C for 3 h. The effects of Al2O3 content ranged from 1 to 15 wt% on the microstructure and electrical properties of the ceramics were investigated in detail. The results show that the electrical properties such as nonlinear coefficient, resistivity and resistance temperature coefficient have been obviously influenced by Al2O3 doping. The optimal samples obtained by doping Al2O3 with 9 wt% have a nonlinear coefficient of 1.3, resistivity of 130 (Ω•cm) and resistance temperature coefficient of -5.4×10-3/ °C.

Effect of Calcination of the Raw Materials on the Microstructure and Electrical Properties of ZnO-Based Linear Resistance Ceramics

2012 ◽  
Vol 724 ◽  
pp. 327-330
Author(s):  
Jian Feng Zhu ◽  
Yong Zhou
Keyword(s):  
Electrical Properties ◽  
Temperature Coefficient ◽  
Raw Materials ◽  
Nonlinear Coefficient ◽  
Ceramic Method ◽  
Linear Resistance ◽  
Resistance Temperature Coefficient

ZnO-based linear resistance ceramics were fabricated by the conventional ceramic method. The effect of calcination of the raw materials on the microstructure and electrical properties was investigated in detail. The results show that the electrical properties, such as resistivity, nonlinear coefficient and resistance temperature coefficient, have been obviously influenced by the calcining process. The optimal samples fabricated with the materials calcinated for twice possess the highest stabilization of resistivity. Meanwhile, the resistance temperature coefficient is improved by 30%, and the nonlinear coefficient of voltage decreases to 1.16, decreased by 20.7%.

Properties of Concentrated Solutions of Indium Chloride

1975 ◽  
Vol 53 (12) ◽  
pp. 1761-1764
Author(s):  
Alan N. Campbell
Keyword(s):  
Molar Volume ◽  
Activity Coefficients ◽  
Ionization Constant ◽  
Relative Viscosity ◽  
Specific Conductance ◽  
Concentrated Solutions ◽  
Degree Of Ionization ◽  
Indium Chloride ◽  
Solvent Water ◽  
Equivalent Conductance

Certain properties of concentrated solutions of indium trichloride, ranging in strength from 9.889 to 0.4070 m, have been investigated. These properties are: density, molar volume, specific and equivalent conductance, degree of ionization, ionization constant, relative viscosity, activities, and activity coefficients of solvent water and of solute. Two interesting results emerge, viz., the specific conductance passes through a maximum at 3.5 m, and, if the ionization of indium chloride is treated as that of a binary electrolyte, the expression α2c/(1 − α) is constant within 10% over the range 6.267 to 0.7363 m (13.90 to 2.122 N).

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