scholarly journals Evolution and Analysis of Dielectric Properties of Typical Materials Under Strong Microwave Field

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 180316-180323
Author(s):  
Yong Gao ◽  
En Li ◽  
Gaofeng Guo ◽  
Hu Zheng ◽  
Yang Zhou
Keyword(s):  
Dielectric Properties ◽  
Microwave Field

scholarly journals Dielectric properties and thermal behavior of electrolytic manganese anode mud in microwave field

2020 ◽  
Vol 384 ◽  
pp. 121227 ◽  
Author(s):  
Kangqiang Li ◽  
Jin Chen ◽  
Jinhui Peng ◽  
Roger Ruan ◽  
Mamdouh Omran ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Thermal Behavior ◽  
Microwave Field ◽  
Electrolytic Manganese

Polymethyl Methacrylate Binder Removal from an Alumina Compact: Microwave Versus Conventional Heating

1992 ◽  
Vol 269 ◽  
Author(s):  
Edmund H. Moore ◽  
David E. Clark ◽  
Ronald Hutcheon
Keyword(s):  
Thermal Decomposition ◽  
Dielectric Properties ◽  
Physical Properties ◽  
Polymethyl Methacrylate ◽  
Electric Furnace ◽  
Microwave Field ◽  
Conventional Heating ◽  
Microwave Cavity ◽  
Polymeric Binder ◽  
Binder Removal

ABSTRACTCompact samples of alumina and polymethyl methacrylate have been heated in a 2.45 GHz microwave cavity and by conventional heating in an electric furnace. Various heating schedules have been used to effect the removal of the polymeric binder by thermal decomposition. Dielectric properties, porosity and other physical properties have been investigated in order to better understand the binder removal process in a microwave field. Results of the study emphasize the amount of carbon residuals remaining in the bulk.

Simulation of Hybrid Heating

1994 ◽  
Vol 347 ◽  
Author(s):  
Daniel J. Skamser ◽  
D. Lynn Johnson
Keyword(s):  
Dielectric Properties ◽  
Microwave Heating ◽  
Microwave Field ◽  
Alumina Fiber ◽  
Hybrid Heating ◽  
Fiber Preforms

ABSTRACTA hybrid microwave heating arrangement used to heat alumina fiber preforms has been modeled to determine what conditions are needed to create significant differences in temperature across the specimen while still maintaining control of the temperature. The model assumes a uniform external microwave field and dielectric properties for the specimen as a function of temperature. The results of the model show that significant differences in temperature can be attained while still having control of the temperature at the center. Experiments show that the temperature at the center can be held at 1000°C and still allow a difference in temperature of 50°C between the center and the surface of the specimen to be present.

scholarly journals Dielectric Properties of Silicothermic Reduction Chromite in the Microwave Field

ACS Omega ◽  
2020 ◽  
Vol 5 (22) ◽  
pp. 12672-12681
Author(s):  
Ting Hu ◽  
Linqing Dai ◽  
Qin Guo ◽  
Bingguo Liu ◽  
Qihao Gui ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Microwave Field ◽  
Silicothermic Reduction

Ultralow dielectric constant nickel–zinc ferrites using microwave sintering

2003 ◽  
Vol 18 (10) ◽  
pp. 2292-2295 ◽  
Author(s):  
Ramesh Peelamedu ◽  
Craig Grimes ◽  
Dinesh Agrawal ◽  
Rustum Roy ◽  
Purushotham Yadoji
Keyword(s):  
Dielectric Constant ◽  
Grain Size ◽  
Dielectric Properties ◽  
High Frequency ◽  
Microwave Field ◽  
Domain Walls ◽  
Microwave Sintering ◽  
Starting Material ◽  
Nickel Zinc ◽  
Magnetic And Dielectric Properties

Ultralow dielectric constant values were measured on Ni–Zn ferrites prepared using Fe2O3 as a starting material and sintered in a microwave field. Significant differences in microstructure, magnetic, and dielectric properties were observed between microwave-sintered Ni–Zn ferrites prepared using Fe3O4 (T34) and those starting with Fe2O3 (T23) ingredients. Higher magnetization values observed in T23 ferrite are attributed to large grain size, possibly containing abundant domain walls and the presence of fewer Fe2+ ions. The ultralow dielectric constant values observed on T23 ferrites show that this procedure is highly suitable to prepare Ni–Zn ferrites for high-frequency switching applications.

Experimental study of the microwave field uniformity coefficient of six sources in the microwave-convective area

2021 ◽  
Vol 1 (42) ◽  
pp. 3-7
Author(s):  
Dmitriy Budnikov ◽  
Keyword(s):  
Dielectric Properties ◽  
Microwave Field ◽  
Operating Mode ◽  
Research Purpose ◽  
Ultrahigh Frequency ◽  
Dense Layer ◽  
Energy Materials ◽  
Uniformity Coefficient ◽  
Processed Material ◽  
Processing Modes

The article presents the data obtained as a result of an experiment on the distribution of the microwave field and the power dissipated in a dense grain layer at different material humidity and waveguide configurations. The development of processing modes with the use of electrical technologies and electromagnetic fields will reduce the energy intensity and cost of grain heat treatment processes. When developing them, it is necessary to take into account the technological requirements for the processed material, the types of electrical technologies used, the operating mode of the intensifying equipment (constant, pulse, and others). (Research purpose) The research purpose is in experimentally evaluating the uniformity of the distribution of the microwave field in the zone of ultrahigh-frequency convective grain processing of a laboratory installation containing six sources of microwave energy. (Materials and methods) The article presents the scheme of the zone of ultrahigh-frequency convective treatment for the study; the factors considered in the experiment and the levels of their variation. (Results and discussion) An experiment was conducted to determine the coefficient of uniformity of the propagation of the microwave field in a layer of grain material. The article presents obtained dependencies. (Conclusions) The results of the study of the microwave field strength in the grain mass can be used in the study of the dielectric properties of the processed grain, as well as in the construction of a control system for the design of ultrahigh-frequency convective processing plants. The values and patterns of changes in the uniformity coefficient of the electromagnetic field distribution in the grain layer indicate a difference between the reference data on the dielectric properties of grain materials and their values for the layer of the processed material. The values of the uniformity coefficient in the considered variants for a dense layer of wheat are in the range of 0.247713-0.426276.

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