JP2013255626A - Container made of ceramic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container made of ceramic which enables efficient heating of a container itself by a simple composition on the occasion of heat treatment of an object to be treated by a microwave and thus enables excellent heat treatment of the material.SOLUTION: In regard to a container 1 made of ceramic which includes a laminated body composed by forming a heating element layer 3 on the surface of a base layer 2 and by forming a coating layer 4 on the surface of the heating element layer 3, the heating element layer 3 is formed by spraying a heating element 5 to be made to generate heat by a microwave, at least on a part of the surface of the base layer 2.

Description

  The present invention relates to a ceramic container, and more particularly to a ceramic container that can be used when a processed object is heated using microwaves.

  Conventionally, foods and the like are heat-treated using a microwave oven. Microwave ovens irradiate foods with microwaves generated from magnetrons, water molecules inside foods absorb and vibrate microwaves, and heat foods with heat generated by friction between water molecules Equipment. Here, the heat treatment of foods using a microwave oven is limited to the heat treatment of foods containing water molecules or foods containing molecules having a molecular structure close to water molecules. In addition, there is a problem that the heating from the inside of the food, etc., and the heating from the outside of the food, such as coloring the surface of the food, cannot be performed. Therefore, a ceramic container that heats food, etc. from the outside by providing a heat generating layer made of a substance that generates heat by absorbing microwaves, and the container itself generates heat when irradiated with microwaves. Has been proposed.

  For example, as shown in Patent Document 1, a microwave absorption heating element layer made of a metal oxide is formed on the outer surface of a cooking vessel base material such as ceramics, and a metal oxide is formed on the outer surface of the microwave absorption heating element layer. The cooking container in which the inorganic coating layer which consists of was formed. During cooking of food by microwaves, the food to be cooked is directly heated by microwaves, and the food is also heated by the surface of the cooking container as the microwave absorption heating element layer generates heat.

Japanese Patent Laid-Open No. 10-57239

  Here, although the cooking container described in Patent Document 1 can raise the surface of the cooking container to a high temperature, there is a problem that a high output microwave is required, the amount of heat generation is small, and cooking time is long. It was. Therefore, the present invention is to provide a ceramic container that can efficiently heat the container itself with a simple configuration and heat the processed object satisfactorily during the heat treatment of the processed object using microwaves.

For this reason, the invention according to claim 1 is a ceramic container comprising a laminate in which a heating element layer is formed on the surface of the base material layer and a coating layer is formed on the surface of the heating element layer.
The heating element layer is characterized in that a heating element that generates heat by microwaves is sprayed on at least a part of the surface of the base material layer.

  According to a second aspect of the present invention, in the ceramic container according to the first aspect, the heating element layer has a multilayer structure.

  The invention according to claim 3 is the ceramic container according to claim 1 or 2, wherein the heating element comprises mullite, a mixture of alumina and titanium oxide, chromium oxide, zirconia, alumina zirconia, and oxidation. It is characterized by comprising any one of titanium, olivine sand, iron oxide, magnesia, spinel, alumina, and natural ore powder composed of oxides.

  The invention according to claim 4 is the ceramic container according to claim 2, wherein the heating element layer is formed by laminating titanium oxide and iron oxide in order from the base material layer toward the coating layer. It is characterized by.

  According to a fifth aspect of the present invention, in the ceramic container according to any one of the first to fourth aspects, the coating layer is made of a releasable ceramic paint.

  The invention described in claim 6 is characterized in that, in the ceramic container according to any one of claims 1 to 5, an uneven shape is formed on the processing object mounting surface of the ceramic container.

  A seventh aspect of the present invention is the ceramic container according to any one of the first to sixth aspects, wherein the ceramic container is a base material layer alone or a grip layer having a coating layer formed on the surface of the base material layer. It has the part.

  The invention according to claim 8 is the ceramic container according to any one of claims 1 to 7, wherein the ceramic container is composed of a container body and a lid.

  According to the invention described in claim 1, in the ceramic container formed of a laminate in which a heating element layer is formed on the surface of the base material layer and a coating layer is formed on the surface of the heating element layer, the heating element layer includes: A heating element that generates heat by microwaves was sprayed on at least a part of the surface of the base material layer.

  As a result, the heating element layer is formed of only the heating element, so the amount of heat generated by the heating element layer by the microwave increases, and the heating efficiency increases. Therefore, during the heat treatment of the processed object by microwave, the container itself can efficiently generate heat, and a ceramic container that can heat-process the processed object satisfactorily can be provided. In addition, since the heating element layer can be formed uniformly, the ceramic container generates heat uniformly during the heat treatment of the processed object by microwave, and local thermal expansion does not occur. Breakage can be prevented. In addition, since it has a coating layer, the surface of the ceramic container has a smooth finish, good releasability, easy cleaning after use, and damage and peeling due to external force of the heating element layer, corrosion due to acids, alkalis, etc. Can be prevented.

  According to the second aspect of the present invention, since the heating element layer has a multi-layer structure, the heat generation amount of the heating element layer by the microwave is increased, and the heat generation efficiency is increased. Therefore, during the heat treatment of the processed object by microwave, the container itself can efficiently generate heat, and a ceramic container that can heat-process the processed object satisfactorily can be provided.

  According to the invention described in claim 3, the heating element includes mullite, a mixture of alumina and titanium oxide, chromium oxide, zirconia, alumina zirconia, titanium oxide, olivine sand, iron oxide, Since it consists of any one of magnesia, spinel, alumina, and natural ore powder composed of oxide, the amount of heat generated by the heating element layer by the microwave increases, and the heat generation efficiency increases. Therefore, during the heat treatment of the processed object by microwave, the container itself can efficiently generate heat, and a ceramic container that can heat-process the processed object satisfactorily can be provided. In addition, since the heating element does not include zinc or other substances that affect the human body, there is no sanitary problem even if the processed product is food or the like.

  According to invention of Claim 4, since the said heat generating body layer laminated | stacked titanium oxide and iron oxide in order toward the said coating layer side from the said base material layer, heat_generation | fever of the heat generating body layer by a microwave The amount increases and the heat generation efficiency increases. Therefore, during the heat treatment of the processed object by microwave, the container itself can efficiently generate heat, and a ceramic container that can heat-process the processed object satisfactorily can be provided.

  According to the invention of claim 5, since the covering layer is made of a releasable ceramic paint, the surface of the ceramic container is smoothly finished, has good releasability, and can be easily washed after use. It is possible to prevent damage and peeling due to external force of the heating element layer, and corrosion due to acid, alkali and the like. It can also withstand high temperatures.

  According to invention of Claim 6, since the uneven | corrugated shape is formed in the processed material mounting surface of the said ceramic container, in the case of the heat processing of the processed material by a microwave, it generate | occur | produces from a processed material by heat processing Excess oils and fats can be collected in the recesses, and the processed product can be heat-treated satisfactorily.

  According to the invention described in claim 7, since the ceramic container has a gripping part in which a coating layer is formed only on the base material layer or on the surface of the base material layer, during the heat treatment of the processed object by the microwave, Since the holding portion does not generate heat, the ceramic container after the heat treatment can be easily held, and the usability of the ceramic container can be improved.

  According to the invention described in claim 8, since the ceramic container is composed of a container main body and a lid, a ceramic container container for accommodating a processed object during the heat treatment of the processed object by microwaves. Heat can be accumulated and the processed material can be heat-treated in a shorter time without unevenness.

It is sectional drawing explaining the laminated structure of the ceramic container of an example of this invention. FIG. 2 is a cross-sectional view of the heating element layer having a multilayer structure in FIG. 1. (A) is a perspective view of a ceramic container of an example of the present invention, (b) is a front view of the ceramic container of (a), and (c) is a cross-sectional view of the ceramic container of (b). It is a perspective view of the ceramic container of another example of this invention. (A) is a perspective view of the ceramic container of another example of this invention, (b) is sectional drawing of the state which closed the cover of the ceramic container of (a).

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. In this example, a ceramic container as an example of the present invention that can be used for cooking when a processed food by microwaves is used as a food will be described. FIG. 1 is a cross-sectional view illustrating a laminated structure of a ceramic container according to an example of the present invention, FIG. 2 is a cross-sectional view of the heating element layer having a multilayer structure in FIG. 1, and FIG. 3 (a) is a ceramic according to an example of the present invention. 3 (b) is a front view of the ceramic container of FIG. 3 (a), FIG. 3 (c) is a sectional view of the ceramic container of FIG. 3 (b), and FIG. FIG. 5 (a) is a perspective view of a ceramic container according to another example of the present invention, and FIG. 5 (b) is a perspective view of the ceramic container according to FIG. 5 (a). It is sectional drawing of a closed state.

  In the ceramic container 1 of the present invention, for example, as shown in FIGS. 1 and 2, the heating element layer 3 is formed on the surface of the base material layer 2, and the covering layer 4 is formed on the surface of the heating element layer 3. The surface of the coating layer 4 is in contact with the object to be cooked. In the present invention, other layers may be included in addition to the above constituent layers, and such other layers include a surface treatment layer such as a printing layer and a blast treatment. Further, as shown in FIG. 2, the heating element layer 3 may have a multilayer structure including different heating elements 5, 5 '.

  In this invention, the base material layer 2 will not be specifically limited if it forms ceramics, such as earthenware, stoneware, ceramics, and porcelain, For example, glass, a ceramic, etc. can be used.

  Further, the heating element 5 that is a material of the heating element layer 3 is not particularly limited as long as it absorbs microwaves and generates heat, and preferably does not contain zinc or the like that affects the human body in terms of food hygiene. For example, mullite, a mixture of alumina and titanium oxide, chromium oxide, zirconia, alumina zirconia, titanium oxide, olivine sand, iron oxide, magnesia, spinel, alumina, natural ore powder composed of oxides, other metal oxides It is preferable to use it.

  Moreover, the material of the coating layer 4 will not be specifically limited if it is a mold release ceramic coating material, For example, a silica, a silicon | silicone, etc. can be used.

  Next, the manufacturing method of the ceramic container 1 of the present invention will be described. First, the container which consists of the base material layer 2 is shape | molded by manufacturing methods, such as a well-known ceramics. That is, water is added to the ceramic powder and uniformly kneaded, the container shape is formed using this raw material, dried, and then fired.

  Next, the heating element layer 3 is formed by spraying the heating element 5 on the surface of the container made of the fired base material layer 2. Therefore, unlike the case where the heating element 5 is dispersed in a solvent such as glaze and then applied to the surface of the container made of the base material layer 2, the heating element layer 3 can be formed only by the heating element 5, The heating element layer 3 can be formed uniformly. And by forming the heat generating body layer 3 only with the heat generating body 5, the heat generation amount of the heat generating body layer 3 is increased and the heat generation efficiency is increased when cooking the food to be cooked by microwaves. Accordingly, the object to be cooked is directly heated by the microwave and also heated by the surface of the ceramic container 1 on which the heating element layer 3 is formed, and the surface of the object to be cooked is baked and heated evenly. At the same time, the heating time can be shortened, and the object to be cooked can be cooked well. In addition, since the heating element layer 3 can be formed uniformly, the ceramic container 1 generates heat uniformly when irradiated with microwaves, and local thermal expansion does not occur in the ceramic container 1. Breakage of the container 1 can be prevented. The heating element layer 3 does not need to be formed on the entire surface of the ceramic container 1, and may be formed on at least a cooking object placing surface where the cooking object and the coating layer 4 are in contact with each other, and is formed at an arbitrary position. can do. The thickness of the heating element layer 3 is not particularly limited, but is appropriately selected depending on the amount of heat generation, productivity, etc., and is preferably about 50 to 200 μm. This is because a sufficient amount of heat generation can be secured when irradiated with microwaves within the above range.

  Here, as a method of spraying the heating element 5 on the surface of the container, a powdered thermal spray material is put into an oxygen-acetylene flame and melted in a flame, and at the same time, accelerated by a combustion gas flow, A high-temperature, high-speed plasma jet is formed in a thermal spray gun by a powder flame spraying method in which a film is formed by colliding with a base material or a high-current direct current arc discharge in a gas such as argon. There is a plasma spraying method in which a film is formed by melting and accelerating by introducing.

  Next, after a releasable ceramic coating is attached to the surface of the heating element layer 3 by a known method such as spraying, the coating layer 4 is uniformly formed by heat treatment and baking. Therefore, the surface of the ceramic container 1 is smoothly finished, has good releasability, can be easily cleaned after use, and prevents the heating element layer 3 from being damaged or peeled off due to external force, or corrosion due to acid or alkali. it can. The covering layer 4 does not have to be formed on the entire surface of the ceramic container 1 and may be formed so as to cover at least the entire surface of the heating element layer 3 and can be formed at an arbitrary position. More preferably, it is formed on the entire surface where the object comes into contact. That is, when the ceramic container 1 is dish-shaped, it is preferable to form the coating layer 4 at least on the entire surface on the front side in contact with the object to be cooked. Moreover, the thickness of the coating layer 4 is not particularly limited, but is appropriately selected depending on strength, productivity, and the like, and is preferably about 30 to 100 μm. This is because the above range can ensure sufficient strength for releasability and protection of the heating element layer 3.

  Here, the shape of the ceramic container 1 may be a dish shape or a bowl shape, and is not particularly limited, and may be various shapes. For example, as shown in FIG. 3, in the ceramic container 1, a concavo-convex shape may be formed on the to-be-cooked object mounting surface that is the front side surface with which the object to be cooked comes into contact. By forming this uneven shape, when cooking the food to be cooked by microwaves, excess oil generated from the food to be cooked by heating can be collected in the recess 7 and the food to be cooked can be heated well. Can be cooked. Moreover, since the site | part which the baking color of a to-be-cooked object attaches can be limited to a contact part with the convex part 6, the to-be-cooked object is changed by changing arrangement | positioning of the uneven | corrugated shape when the ceramic container 1 is seen from a front view. A pattern with a baked color can be made into a specific shape. For example, the ceramic container 1 in FIG. 3 can be given a striped baked color. Although not shown, when the ceramic container 1 is viewed from the front, the arrangement of the concavo-convex shape becomes a mesh pattern, and the grilled color of the mesh pattern can be applied to the object to be cooked. In addition, arrangement | positioning of this uneven | corrugated shape is not specifically limited, It can provide arbitrarily.

  The ceramic container 1 may have a shape having a gripping portion 8 as shown in FIG. Further, by adopting a configuration in which the heating element layer 3 is not provided in the gripping portion 8, the gripping portion 8 does not generate heat when irradiated with microwaves. Therefore, since the ceramic container 1 can be handled with the grip portion 8 which is a low temperature part after cooking the food to be cooked by microwaves, the usability of the ceramic container 1 can be improved.

  Moreover, the ceramic container 1 may be comprised from the container main body 9 and the cover body 10, as shown in FIG. 5, and the container main body 9 is the lamination | stacking which consists of the base material layer 2, the heat generating body layer 3, and the coating layer 4. As shown in FIG. The lid 10 is a laminated body composed of the base material layer 2 and the coating layer 4. The object to be cooked is hermetically sealed by the lid 10 in the accommodating portion 11 that accommodates the object to be cooked, so that when the object to be cooked is heated by microwaves, it is directly heated by the microwave that passes through the lid 10. Also, the surface of the container body 9 on which the heating element layer 3 is formed is heated, and the surface of the object to be cooked is baked. It can be cooked without unevenness. Further, the heating element layer 3 may be provided on the lid body 10, and the cooking object is heated by the heat generation of the container body 9 and the lid body 10 when cooking the cooking object by microwave. Cooked food can be cooked in a steamed state.

Next, the present invention will be specifically described with reference to examples, but these examples do not limit the present invention.
(Examples 1-7)
A ceramic plate made of the base material layer 2 was formed using a low thermal expansion clay made of petalite and plastic clay. The firing temperature in the formation of the porcelain plate is about 1230 ° C., and the firing time is about 12 hours. The ceramic plate has an oval shape of 210 × 150 × 35 mm and a thickness of about 4 mm. Subsequently, the heat generating body 5 shown in Table 1 was laminated | stacked by spraying on the one surface of the ceramic board which consists of the base material layer 2 by uniform thickness, and the heat generating body layer 3 was formed. The thickness of the heating element layer 3 is about 100 μm. Next, a ceramic release container 1 was formed by laminating the release ceramic coating on the surface of the heating element layer 3 with a uniform thickness by spraying to form a coating layer 4. The thickness of the coating layer 4 is about 40 μm.

(Example 8)
A ceramic plate made of the base material layer 2 was formed using a low thermal expansion clay made of petalite and plastic clay. The firing temperature in the formation of the porcelain plate is about 1230 ° C., and the firing time is about 12 hours. The ceramic plate has an oval shape of 210 × 150 × 35 mm and a thickness of about 4 mm. Next, titanium oxide is laminated on one surface of the ceramic plate made of the base material layer 2 to a uniform thickness by thermal spraying, and further, iron oxide is laminated on the surface of the titanium oxide to a uniform thickness by thermal spraying to form a heating element layer. 3 was formed. The thickness of the heating element layer 3 is about 100 μm. Next, a ceramic release container 1 was formed by laminating the release ceramic coating on the surface of the heating element layer 3 with a uniform thickness by spraying to form a coating layer 4. The thickness of the coating layer 4 is about 40 μm.

  Next, the ceramic container 1 of Examples 1 to 8 was put in a commercially available household microwave oven (output 500 W), irradiated with microwaves having an oscillation frequency of 2450 MHz for 3 minutes, and then the ceramic container 1 was taken out from the microwave oven. The exothermic temperature of the surface of the ceramic container 1 was measured. The results are shown in Table 2.

  In addition, frozen pizza dough cut into quarters without seasoning liquid such as oil, soy sauce, sauce, etc. (sliced salami, cheese, vegetables etc. as topping materials are on the dough) And this to-be-cooked object was arrange | positioned to the ceramic-made containers 1 of Examples 1-8, it put into the household microwave oven (output 500W), and the microwave of the oscillation frequency 2450MHz was irradiated for 3 minutes. The state of the baked color of the cooking object after microwave irradiation was observed. The results are shown in Table 2.

  As is clear from the results shown in Table 2, it can be seen that the exothermic temperature of the surface of the ceramic container 1 of Examples 1 to 8 is high, and in particular, Example 8 is even higher. Further, in Examples 1 to 8, it is understood that seasoning liquids such as oil, soy sauce and sauce are not applied to the food to be cooked, and the food to be cooked can be colored by cooking using a microwave oven with an output of 500 W. . Therefore, Examples 1-8 have the favorable heat_generation | fever characteristic by a microwave, and can cook a to-be-cooked item favorably.

  As described in detail above, the ceramic container 1 of the present invention is a ceramic made of a laminate in which the heating element layer 3 is formed on the surface of the base material layer 2 and the covering layer 4 is formed on the surface of the heating element layer 3. In the container, the heating element layer 3 is obtained by spraying a heating element 5 that generates heat by microwaves on at least a part of the surface of the base material layer 2.

  The packaging container of the present invention is useful for heat treatment using microwaves, for example, processed foods such as fish, meat, dumplings, pizza, frozen food, rice, water, and other foods and medicines. is there.

DESCRIPTION OF SYMBOLS 1 Ceramic container 2 Base material layer 3 Heat generating body layer 4 Covering layer 5, 5 'Heat generating body 6 Convex part 7 Concave part 8 Grasping part 9 Container main body 10 Cover body 11 Storage part

Claims (8)

In a ceramic container formed of a laminate in which a heating element layer is formed on the surface of the base material layer and a coating layer is formed on the surface of the heating element layer,
The ceramic heating container is characterized in that a heating element that generates heat by microwaves is sprayed on at least a part of the surface of the base material layer.   The ceramic container according to claim 1, wherein the heating element layer has a multilayer structure.   The heating element includes mullite, a mixture of alumina and titanium oxide, chromium oxide, zirconia, alumina zirconia, titanium oxide, olivine sand, iron oxide, magnesia, spinel, alumina, and oxide. The ceramic container according to claim 1, wherein the ceramic container is made of any one of natural ore powders made of   3. The ceramic container according to claim 2, wherein the heating element layer is formed by laminating titanium oxide and iron oxide in order from the base material layer toward the coating layer side.   The ceramic container according to any one of claims 1 to 4, wherein the coating layer is made of a releasable ceramic paint.   The ceramic container according to any one of claims 1 to 5, wherein an uneven shape is formed on a treated product placement surface of the ceramic container.   The ceramic container according to any one of claims 1 to 6, wherein the ceramic container includes a base material layer alone or a grip portion in which a coating layer is formed on a surface of the base material layer.   The said ceramic container is comprised from a container main body and a cover body, The ceramic container of any one of Claims 1-7 characterized by the above-mentioned.

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