Thermistors – in search of new applications, manufacturers cultivate advanced NTC techniques

Abstract

If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractAs leading sensors of ambient conditions, temperature sensors act as important sensing devices. They are essential in a large variety of products. A variety of temperature sensors is available on the market to meet specific application needs. The most common include thermocouples, resistive temperature detectors (RTD), thermistors, and silicon-based sensors. But of all of these temperature sensors, the thermistor is the only one that holds the esteemed position owing to its high sensitivity, accuracy and low cost. Temperature measurement systems utilizing thermistors are less expensive to produce because few additional components are required, especially in the present era of embedded systems. With the recent advances in manufacturing techniques, the drawbacks of conventional thermistors, like aging, interchangeability, unreliability etc., are almost eliminated. Booming demand for DVD players and portable communication appliances have pushed up the popularity of NTC thermistors. This article reviews the latest trends in thermistor manufacturing and the associated applications. Electronic accessThe research register for this journal is available at

Thermal Treatment of Aerosol Deposited NiMn2O4 NTC Thermistors for Improved Aging Stability

“…Today, NTCR sensors are mainly bulk ceramics [10], which are produced in the form of chips, discs or SMD [11]. They are usually produced by traditional ceramic and sinter-based processes with controlled sintering profiles and temperatures above 1000 °C [12]. These processes are not very flexible and very labor- and energy-intensive.…”

Preparation of ultra-fine FeNiMnO4 powders and ceramics by a solid-state coordination reaction

“…Spinel-structured mixed transition-metal manganite ceramics are technologically important materials for fabrication of negative temperature coefficient (NTC) ceramic thermistors, which are widely used in the fields of temperature measurement and control, temperature compensation, and suppression of inrush current [1,2]. The electrical properties of ceramic thermistors are characterized by three basic exploitation parameters: room temperature resistivity U 25qC , thermal constant B 25/85qC , and aging coefficient DR/R(%).…”

Preparation of Ultra‐Fine Nickel Manganite Powders and Ceramics by a Solid‐State Coordination Reaction

“…T he Mn‐based transition‐metal spinel oxide ceramics are widely used as negative temperature coefficient (NTC) thermistors for temperature measurement and compensation due to their high sensitivity to temperature change and low price 1–3 . The specific resistivity of these ceramics follows the well‐known Arrhenius relation: ρ=ρ 0 exp( E a / kT ), in which ρ is the specific resistivity, E a is the activation energy for conduction, k is Boltzmann's constant, and T is the absolute temperature.…”