Thermal Conductivity of Crystalline Dielectrics

Thermal Conductivity of Crystalline Dielectrics, 12-206 to 207 Thermal Conductivity of Gases, 6-206 to 207 Thermal Conductivity of Glasses, 12-210 to... 

Another possibihty to improve the temperature homogeneity is to introduce an additional polysiHcon plate in the membrane center. The thermal conductivity of polysilicon is lower than that of crystalline siHcon but much higher than the thermal conductivity of the dielectric layers, so that the heat conduction across the heated area is increased. Such an additional plate constitutes a heat spreader that can be realized without the use of an electrochemical etch stop technique. Although this device was not fabricated, simulations were performed in order to quantify the possible improvement of the temperature homogeneity. The simulation results of such a microhotplate are plotted in Fig. 4.9. The abbreviations Si to S4 denote the simulated temperatures at the characteristic locations of the temperature sensors. At the location T2, the simulated relative temperature difference is 5%, which corresponds to a temperature gradient of 0.15 °C/pm at 300 °C. 

LOW TEMPERATURE THERMAL CONDUCTIVITY OF SELECTED DIELECTRIC CRYSTALLINE SOLIDS. FROM PROCEEDINGS OF THE EIGHTH CONFERENCE ON THERMAL CONDUCTIVITY. THERMOPHYSICAL PROPERTIES RESEARCH CENTER. PURDUE UNIVERSITY. WEST LAFAYETTE, INDIANA. OCT. 7-10,... 

This table lists the thermal conductivity of a number of crystalline dielectrics, including some which find use as optical materials. Values are given at temperatures for which data are available. 

THE THERMAL CONDUCTIVITY OF DIELECTRIC CRYSTALLINE SOLIDS AT LOW TEMPERATURES. PH. D. THESIS. 

R.B. Stephens, Low-temperature specific heat and thermal conductivity of non-crystalline dielectric... 

The formation of radical intermediates influences not only the chemical state of irradiated polymers, but it brings also about physical characteristics solubility, fusion enthalpy, heat capacity, crystallinity, mechanical features, electrical properties permittivity, dielectric loss, breakdown tension, thermal conductivity. The new formed structures may be unlike in comparison with initial material, because intermolecular bridges, new organic functions appeared on macromolecular backbones, general molecular order or free volumes attain other values. 

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