Electromagnetic wave energy conversion heat-generating material, heating container for microwave oven, and microwave oven
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMitsumasa Oku, Kohei Shiota
Life of this patent
Estimating the term…
Abstract
An electromagnetic wave energy conversion heat-generating material comprising zinc oxide whisker used as a heat-generating material. A heating container for an electronic oven, comprising the zinc oxide whiskers, and a microwave oven provided with a heat generator comprising the zinc oxide whiskers. The present electromagnetic wave energy conversion heat-generating material generates heat upon exposure to microwaves. In a preferred embodiment, the zinc oxide whiskers include a central part and needle crystal projections extending from the central part in plural, preferable four, different axial directions.
Claims25
An electromagnetic wave energy conversion heat-generating material comprising zinc oxide whiskers in an aggregated form or dispersed in a matrix, said zinc oxide whiskers being not less than 10 .mu.m in length from a base portion of each whisker to a top portion of each whisker and having a resistivity of from 10 to 10.sup.8 .OMEGA..multidot.cm, and said matrix being at least one selected from the group consisting of ceramics, glasses, enamels, resins, rubbers, organic coating materials, inorganic coating materials, clay, mica, sand, earthenware, porcelain, water and oil.
A heating container for a microwave oven comprising means for supporting a material to be heated in a microwave oven at least part of said supporting means is composed of an electromagnetic wave energy conversion heat-generating material comprising zinc oxide whiskers dispersed in a matrix, said zinc oxide whiskers being not less than 10 .mu.m in length from a base portion of each whisker to a top portion of each whisker and having a resistivity of from 10 to 10.sup.8 .OMEGA..multidot.cm, and said matrix being at least one selected from the group consisting of ceramics, glasses, enamels, resins, rubbers, organic coating materials, inorganic coating materials, clay, mica, sand, earthenware, porcelain, water and oil.
A microwave oven having a heating chamber with an electromagnetic wave energy conversion heat generator provided within said heating chamber, said electromagnetic wave energy conversion heat generator comprising zinc oxide whiskers in an aggregated form or dispersed in a matrix, said zinc oxide whiskers being not less than 10 .mu.m in length from a base portion of each whisker to a top portion of each whisker and having a resistivity of from 10 to 10.sup.8 .OMEGA..multidot.cm, and said matrix being at least one selected from the group consisting of ceramics, glasses, enamels, resins, rubbers, organic coating materials, inorganic coating materials, clay, mica, sand, earthenware, porcelain, water and oil.
A microwave oven having a heating chamber with heating container provided within said heating chamber, said heating container comprising zinc oxide whiskers dispersed in a matrix, said zinc oxide whiskers being not less than 10 .mu.m in length from a base portion of each whisker to a top portion of each whisker and having a resistivity of from 10 to 10.sup.8 .OMEGA..multidot.cm, and said matrix being at least one selected from the group consisting of ceramics, glasses, enamels, resins, rubbers, organic coating materials, inorganic coating materials, clay, mica, sand, earthenware, porcelain, water and oil.
Dependencies are inferred from the claim text.