화학공학소재연구정보센터
Thermochimica Acta, Vol.543, 142-149, 2012
Calorimetric sensitivity and thermal resolution of a novel miniaturized ceramic DSC chip in LTCC technology
The calorimetric properties of a novel miniaturized ceramic differential scanning calorimeter device (MC-DSC) with integrated heater and crucible are presented. All features of a conventional DSC apparatus (including oven) are integrated into this DSC device of the size 11 mm x 39 mm x 1.5 mm. The MC-DSC device is suitable for one-way use, since it is fully manufactured in the low-cost planar low temperature co-fired ceramics technology. First characterization of this device is performed using indium, tin and zinc samples. The calorimetric sensitivity at 156.6 degrees C is 0.24J/degrees C s. It depends linearly on temperature in the range of at least 150 degrees C and 420 degrees C. The calorimetric sensitivity is constant up to an enthalpy of fusion of at least Delta H = 750 mJ (at 156.6 degrees C). The thermal analysis of indium in direct contact to the crucible of the chip even reveals a constant calorimetric sensitivity up to an enthalpy of fusion of at least Delta H = 1000 mJ. The repeatability of the peak area is within +/- 0.3% (11 mg indium, 10 measurements). The thermal resolution determined using 4,4'-azoxyanisole under TAWN test conditions is 0.12 (i.e. 88%). The thermal resolution determined using Dotriacontane is 0.58 (i.e. 42%). Simulations of a strongly simplified finite element model of the MC-DSC device agree well with measurement results allowing a model-based prediction of its basic characteristics. (C) 2012 Elsevier B.V. All rights reserved.