754. A new twin micro-calorimeter, and the heat of transformation of α- into β-quinol

1952 ◽  
Vol 0 (0) ◽  
pp. 3932-3936 ◽  
Author(s):  
D. F. Evans ◽  
R. E. Richards
Keyword(s):  
Heat Of Transformation ◽  
Micro Calorimeter

Trade-off study of the SQUID read-out for a hot-electron micro-calorimeter

1998 ◽  
Vol 08 (PR3) ◽  
pp. Pr3-233-Pr3-236
Author(s):  
M. Frericks ◽  
H. F.C. Hoevers ◽  
P. de Groene ◽  
W. A. Mels ◽  
P. A.J. de Korte
Keyword(s):  
Hot Electron ◽  
Trade Off ◽  
Micro Calorimeter

Micro Calorimeter

Physics Today ◽  
1950 ◽  
Vol 3 (5) ◽  
pp. 34-35
Author(s):  
G. H. Jenks
Keyword(s):  
Micro Calorimeter

High‐precision X‐ray spectroscopy of Fe ions in an EBIT using a micro‐calorimeter detector: First results

2019 ◽  
Vol 49 (1) ◽  
pp. 184-187
Author(s):  
Marc O. Herdrich ◽  
Andreas Fleischmann ◽  
Daniel Hengstler ◽  
Steffen Allgeier ◽  
Christian Enss ◽  
...  
Keyword(s):  
High Precision ◽  
X Ray ◽  
First Results ◽  
Fe Ions ◽  
Micro Calorimeter

Simulation of Heat Transfer in Bridge-Based Micro Calorimeters

2009 ◽  
Author(s):  
Jun Yu ◽  
Zhen’an Tang ◽  
Zhengxing Huang ◽  
Chong Feng
Keyword(s):  
Heat Transfer ◽  
Heat Capacity ◽  
Temperature Distribution ◽  
Heat Generation ◽  
Silicon Substrate ◽  
Three Dimensional ◽  
Temperature Response ◽  
Differential Method ◽  
Three Dimensional Finite Element ◽  
Micro Calorimeter

Previous studies of bridge-based micro calorimeters have shown that these devices can measure heat capacity and melting point of ultra thin films with pulse scan calorimetry. The bridge-based micro calorimeters consist of a sample region and several beams that connecting the sample region with silicon substrate. Both the sample region and the beams are suspending on the silicon substrate for thermal isolation. The temperature distribution of the micro calorimeter during a heating pulse depends on the joule-heating of the heating resistor, the heat absorption and heat conduct of the bridge. The heat transfer through the beams during a pulse scan measurement is complex because there is heat generation on some beams and the temperature distribution along the beams is not uniform. Using three dimensional finite element analyses (FEA), the thermal-electrical simulations of the heat transfer in the bridge-based micro calorimeters have been performed. The heat consumption and temperature distribution at steady state analyses, the temperature response of the bridge and the heat generation of the heater at transient analyses have been calculated for the bridge-based micro calorimeter with different sample thermal conductivities and heat capacities. The simulation results indicate that for the bridge-based microcalorimeter using pulse calorimetry, when the heat capacity of the sample film is close to or larger than the heat capacity of an empty calorimeter, the differential method of getting the sample heat capacity from the difference between a micro calorimeter with and without the sample is no longer suitable because the heat transfer and temperature distributions of the two calorimeters are no longer comparable to each other.

Silicon-Based Micro Calorimeter With Single Thermocouple Structure for Thermal Characterization

2019 ◽  
Vol 40 (7) ◽  
pp. 1198-1200 ◽  
Author(s):  
Zhuqing Wang ◽  
Mitsuteru Kimura ◽  
Masaya Toda ◽  
Takahito Ono
Keyword(s):  
Thermal Characterization ◽  
Silicon Based ◽  
Micro Calorimeter

scholarly journals X-ray investigation of the structure transition of methane at the λ point

1939 ◽  
Vol 171 (947) ◽  
pp. 569-578 ◽  
Keyword(s):  
Crystal Structure ◽  
Specific Heat ◽  
Structure Transition ◽  
Sharp Maximum ◽  
Critical Range ◽  
Other Substances ◽  
Strong Resemblance ◽  
Transition Points ◽  
Λ Point ◽  
Heat Of Transformation

A great deal of work has been done on the crystal structure of long-chain hydrocarbons and their behaviour near transition points. These transitions are as a rule quite normal, in so far as the transition is marked by the liberation or binding of a definite heat of transformation and change in structure. The simplest of the hydrocarbons, methane, shows a change from the ordinary behaviour. At 20.4° K a so-called transition of the second kind (Clusius and Perlick 1933) takes place, of which an abnormal rise of the specific heat is typical. This begins at low temperatures where the specific heat rises at first slowly to reach a very sharp maximum at 20.4° and then falls abruptly to somewhat normal values. No latent heat appears. The effect bears a strong resemblance to the λ point of helium and other substances. The crystal structure of methane has been directly determined by two authors (McLennan and Plummer 1929; Mooy 1931) of whom only Mooy paid special attention to any possible change of structure at the transition point. He observed no change in the critical range. The structure is cubic face-centred according to both authors, but we would like to point out that Mooy’s table contains two lines which do not belong to reflexions from that lattice and which he labelled “parasitic lines”.

Study on spontaneous combustion risk of cotton using a micro-calorimeter technique

2013 ◽  
Vol 50 ◽  
pp. 383-390 ◽  
Author(s):  
Xuejuan Zhao ◽  
Huahua Xiao ◽  
Qingsong Wang ◽  
Ping Ping ◽  
Jinhua Sun
Keyword(s):  
Spontaneous Combustion ◽  
Micro Calorimeter
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