Effect of Thickness and Orientation of Alumina Fibrous Thermal Insulation on Microwave Heating in a Modified Domestic 2.45 GHz Multi‐mode Cavity

Abstract

A rectangular piece of alumina fiber insulation was designed to prevent heat loss. The heat source was generated by a susceptor material, which was used as a microwave (MW) absorber (heater). The thicknesses of different sides (frontal, lateral, and longitudinal) of the insulation piece were varied from side to side to study the penetration level of MW electromagnetic field coming from both horizontal and vertical incidences. The experience has shown an increase in temperature when top and longitudinal thicknesses were decreased. It has also been found that specific orientation of the insulation box leads to a maximum MW heating efficiency.

Mechanical properties of anorthite based ceramics prepared from kaolin DD2 and calcite

“…In this work, the long-term goal is the development of a low cost anorthite from inexpensive raw materials, such as kaolin and calcite (CaCO 3 ) using a modified milling system. Many works have already been published for appreciating these native raw materials including bioceramics [9][10][11][12][13][14][15][16][17], advanced ceramics [18][19][20][21][22][23][24][25][26][27] and ceramic membranes [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. Most of these publications are closely related to this work and clearly highlight their possible applications.…”

Development and characterization of tubular composite ceramic membranes using natural alumino-silicates for microfiltration applications

“…Algeria is one of the countries in the world that have abundantly available raw materials, such as calcium carbonates (CaCO 3 )(CC), dolomite (CaCO 3 ·MgCO 3 ), bones (natural derived hydroxyapatite (HA): Ca 10 (PO 4 ) 6 (OH) 2 ), kaolin, feldspar and quartz. Many works have already been published for valorizing these native raw materials, for the production of advanced ceramics [1][2][3][4][5][6][7], ceramic membranes [8][9][10][11][12][13][14][15][16][17][18][19] and bioceramics [20][21][22][23][24][25][26][27]. In particular, in the membrane field the possibility of replacing the more expensive starting materials by cheaper raw materials to be used as a support (which constitutes about 99% of the filter mass) is significantly important from economic and energetic points of view.…”

Elaboration and characterization of low cost ceramics microfiltration membranes applied to the sterilization of plant tissue culture media

“…In order to decrease membrane cost and make full use of our natural resources, supports have been manufactured from local raw materials, kaolin (Al 2 Si 2 O 5 (OH) 4 ) and (CaCO 3 ) [12,15,16,54]. The choice of these materials has been dictated by their natural abundance and their thermal stability [16].…”

“…Algeria is one of the countries in the world that have abundantly available raw materials, such as calcium carbonates (CaCO 3 )(CC), dolomite (CaCO 3 MgCO 3 ), bones (natural derived hydroxyapatite (HA): Ca 10 (PO 4 ) 6 (OH) 2 ), kaolin, feldspar and quartz. Many works about the valorization of these native raw materials have been published, such as the production of advanced ceramics [1][2][3][4][5][6][7][8][9], ceramic membranes [10][11][12][13][14][15][16][17][18][19][20][21][22][23] and bioceramics [24][25][26][27][28][29][30][31][32][33][34][35].…”