Porous heat storing microwave absorbing material for microwave oven and preparation method of porous heat storing microwave absorbing material

A wave-absorbing material and microwave oven technology, applied in the field of daily necessities ceramics

Active Publication Date: 2013-01-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages that ordinary ceramic vessels cannot absorb microwaves and cannot be heated, in order to reduce the accident rate during the use of microwave ovens, this patent provides A porous thermal storage ceramic material capable of absorbing microwaves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The composition of the porous heat storage wave-absorbing material for microwave ovens in this embodiment is: SiO 2 47wt%, Al 2 o 3 22wt%, Fe 2 o 3 11wt%, CaCO 3 5wt%, ZrO 2 5wt%, porosity 20%.

[0021] The preparation method of the porous heat-storage wave-absorbing material for microwave ovens in this example is as follows: mix the ingredients according to the ingredients of the porous heat-storage wave-absorber material for microwave ovens, pass through a 400-mesh sieve after ball milling, and then carry out aging, pressure molding, drying treatment and glazing treatment in sequence , and then according to the heating rate of 2°C / min, the temperature was raised to 800°C for 3 hours, and finally the temperature was raised to 1200°C for 15 hours; the mass ratio of ball milling material to water during ball milling was 1:1 , the ball milling time is 12 hours; the stale temperature is 20°C, the humidity is 70%, and the stale time is 48h; the mold...

Embodiment 2

[0022] Embodiment 2: The composition of the porous heat storage wave-absorbing material for microwave ovens in this embodiment is: SiO 2 40%, Al 2 o 3 20%, Fe 2 o 3 30%, CaCO 3 6%, ZrO 2 4%, and the porosity is 30%.

[0023] The preparation method of the porous heat-storage wave-absorbing material for microwave ovens in this example is as follows: mix the ingredients according to the ingredients of the porous heat-storage wave-absorber material for microwave ovens, pass through a 400-mesh sieve after ball milling, and then carry out aging, pressure molding, drying treatment and glazing treatment in sequence , and then according to the heating rate of 8°C / min, the temperature was raised to 900°C for 2 hours, and finally the temperature was raised to 1300°C for 13 hours; the mass ratio of ball milling material to water was 3:1 during ball milling , the ball milling time is 13 hours; the stale temperature is 25°C, the humidity is 50%, and the stale time is 40h; the mold...

Embodiment 3

[0024] Embodiment 3: The composition of the porous heat-storage wave-absorbing material for microwave ovens in this embodiment is: SiO 2 35%, Al 2 o 3 40%, Fe 2 o 3 10%, CaCO 3 5%, ZrO 2 10%, porosity 25%.

[0025] The preparation method of the porous heat-storage wave-absorbing material for microwave ovens in this example is as follows: mix the ingredients according to the ingredients of the porous heat-storage wave-absorber material for microwave ovens, pass through a 400-mesh sieve after ball milling, and then carry out aging, pressure molding, drying treatment and glazing treatment in sequence , and then according to the heating rate of 10°C / min, the temperature was raised to 1000°C for 1h, and finally the temperature was raised to 1400°C for 12h; the mass ratio of ball milling material to water during ball milling was 2:1 , the ball milling time is 15 hours; stale temperature is 30°C, humidity is 60%, and stale time is 8h; molding is by pressure molding, and th...

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Abstract

The invention relates to a porous heat storing microwave absorbing material for a microwave oven and a preparation method of the porous heat storing microwave absorbing material. The microwave absorbing materials are prepared by the following components in percentage by weight: 35 to 50wt% of SiO2, 20 to 40wt% of Al2O3, 10 to 30wt% of Fe2O3, 5 to 10wt% of CaCO3, and 1 to 10wt% of ZrO2; and porosity is 20 to 40%. The preparation method comprises the following steps of: mixing and preparing the components of the porous heat storing microwave absorbing material for the microwave oven, and processing same via ball milling, then sieving with 400 meshes, and sequentially processing by ageing, pressure forming, drying and glazing; then heating to reach 800 to 1000 DEG C at a heating rate of 2 to 10 DEG C / min, and keeping the temperature for 1 to 3 hours; and finally heating the temperature to 1200 to 1400 DEG C, and roasting for 12 to 15 hours. The microwave absorbing material provided by the invention is innocuous and unpoisonous, can be quickly heated in the microwave oven so as to diffuse energy of liquid or food, and the energy can be slowly supplied to the liquid or the food in a heat conduction way, therefore, the phenomenon that the food is excessively hot and bumped, and a safer cooling ware is provided for a user who uses the microwave oven; and the preparation method is simple and easy to carry out.

Description

technical field [0001] The invention relates to a porous heat storage wave-absorbing material for a microwave oven and a preparation method thereof, belonging to the field of daily necessities ceramics. Background technique [0002] Most of the existing microwave cooking utensils are made of materials that cannot absorb microwaves such as pottery, glass, plastics, etc. These utensils themselves can only pass through microwaves and cannot absorb microwaves. Most people don't know which utensils can be heated in the microwave oven without causing accidents. [0003] According to the FDA (Food and Drug Administration) report of the United States, many reports of "injury" due to the use of microwave ovens have been received. The most common accidents have two types: 1. Liquids are overheated in microwave ovens. Microwave heating is different from traditional heating. Microwave heating water does not flow, but the temperature rises. It may exceed the boiling point and "not open"...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/10C04B35/622
Inventor 刘秉国王彬彬彭金辉张世敏许磊
Owner KUNMING UNIV OF SCI & TECH
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