KR101848388B1 - METHOD FOR FABRICATING SiC FIBER FLATE HEATING ELEMENT - Google Patents

Abstract

The present invention is to provide a method for fabricating a SiC fiber surface heating element without an additional process during a SiC fiber manufacturing process, by 1) arranging PCS fiber in one direction or in multiple directions and the same direction, or 2) controlling molds to have desired thickness and shape, in order to insoluble PCS fiber having a thin flat surface after insolubilizing polymer PCS fiber in the SiC fiber manufacturing process. To this end, an embodiment of the present invention provides a method for fabricating a SiC fiber surface heating element, which includes a step of insolubilizing PCS fiber with iodine gas and a step of inserting the insoluble PCS into a thin, wind and flat mold.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method of manufacturing a SiC fiber surface heating element,

The present invention relates to a planar heating element having a thin flat flat surface for application as a heating element by utilizing SiC fibers exhibiting high strength without melting or burning at an extremely high temperature in the air and exhibiting stable durability. Is a method for producing a SiC fiber surface heating element without woven SiC fibers into a fabric, and relates to a manufacturing method of molding the surface heating element and heat-treating the surface heating element.

Since SiC fiber is manufactured in an inert atmosphere at 1300 ~ 2000 degree, it has excellent mechanical properties at a very high temperature. Therefore, it has recently been used in space aerospace engine, nuclear power plant internal structure material, thermal power plant turbine blade, sports car brake pad / It is widely used in various fields such as tooling. Another distinguishing feature of SiC fibers is the absorption of microwaves and the absorption of absorbed microwave energy into joules heat. The SiC material has been widely used as a joule heat generating element in an electric resistance method. In addition, it has been used as a heating element by irradiating microwaves. However, since it has a large volume and a large weight, it takes a long time to rise to a temperature for heating the object to be heated and it is relatively difficult to raise the temperature to the desired temperature accurately. On the other hand, the SiC fibers are very small in diameter of 10 to 15 μm, so that they are extremely small in volume and have a very small weight, so that microwaves irradiated from the outside are absorbed and converted into joule heat so that the temperature of the surface of the SiC fiber Is very fast. Accordingly, the thermal conversion response speed for microwaves is very fast, which is advantageous in that accurate temperature control is possible. Very thin SiC fibers have the advantage of rapid cooling and simultaneous rapid heating. However, in order to apply this method, a specific shape must be provided. In the conventional manufacturing method, there is a method of arranging conductive fibers in a line and forming a complicated flow path at the same time to induce surface heat generation by electric resistance heat generation. However, It is impossible to generate heat above 1000 ℃. As another manufacturing method, a conductive mixed solution is prepared by mixing conductive particles in the form of powder with an organic binder and then applied to perform a role as a surface heating element by heat generation of the battery resistance. In the method of mixing the organic binder and the conductive particle mixture The surface heating element manufactured by the method of the present invention has a high electric resistance and low heat efficiency and can not be used at temperatures higher than 300 DEG C at which the organic binder is decomposed. In addition, there is a method in which conductive fibers are woven to form a sheet and used as an electrical resistance heating element. However, since short-circuiting can occur due to contact between fibers having different weaving directions, the defective ratio is high and the thermal efficiency is lower than that of the conductive fibers used. .

In the present invention, the SiC fiber manufacturing process includes: 1) inducing the SiC fibers to be aligned in one direction; 2) inducing the SiC fibers to be shaped in various thicknesses and shapes, while increasing the heating efficiency by microwaves; A technique for easily manufacturing a heating element by a simple process is provided.

The present invention has been made to solve the problems of the prior art in that SiC fiber fabrication process is performed by inserting polymer PCS fibers and then insolubilizing PCS fibers into a thin and flat wide surface by arranging PCS fibers in one direction, (Mold) so as to have a desired thickness and shape so as to produce a SiC fiber surface heating element without any additional process during the SiC fiber manufacturing process.

According to an aspect of the present invention, there is provided a method of fabricating a semiconductor device, comprising: disassembling a PCS fiber with an iodine gas; And charging the infusibilized PCS fibers into a thin, wide, flat surface mold (mold). The present invention also provides a method of manufacturing a SiC fiber surface heating element.

In another aspect of the present invention, there is provided a method of manufacturing a SiC fiber surface heat emission element, which comprises a step of arranging unidirectional, multi-directional, and equidirectionally oriented PCS fibers, And a manufacturing method thereof.

According to another embodiment of the present invention, there is provided a method of manufacturing a fiber-reinforced thermosetting resin composition, comprising the steps of: preparing a plurality of molds (molds) A method of manufacturing a heating element is provided.

According to the present invention, the produced SiC fiber surface heating element exhibits a heating rate that is 100 times or more higher than that of a conventional SiC material (block) heating element and a temperature rise of about 1500 ° C., exhibits a highly efficient heating behavior, and is converted into a joule heat no CO ₂ gas is generated according As is very clean. The SiC fiber surface heating element manufactured according to the present invention can be said to be very useful in deriving various application fields.

In addition, according to the present invention, it is possible to easily arrange the PCS fibers that have not been infused during the SiC fiber manufacturing process so as to have a desired direction, shape, and thickness on the mold (mold), so that the SiC fiber surface heating element is added as a fabric It is possible to easily produce a simple process without any process, and also to control the desired arrangement, shape and thickness easily and in real time.

In addition, according to the present invention, it is possible to stack a plurality of molds (molds) used in the production of a SiC fiber surface heating element, and simultaneously produce a large amount of surface SiC fiber surface heating elements.

1 is a view illustrating a manufacturing process of a SiC fiber surface heating element according to an embodiment of the present invention.
2A and 2B are schematic diagrams and a mold (mold) for manufacturing a SiC fiber surface heating element according to an embodiment of the present invention.
FIG. 3 is a photograph of an imbricated PCS fiber mold (mold) and an SiC fiber surface heating element in accordance with an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the technical idea of the present invention. In the following description, numerous specific details are set forth, such as specific elements, which are provided to aid a more thorough understanding of the present invention, and it is to be understood that the present invention may be practiced without these specific details, It will be obvious to those who have. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a view illustrating a manufacturing process of a SiC fiber surface heating element according to an embodiment of the present invention. Figs. 2A and 2B are a schematic diagram and a mold (mold) for producing a surface SiC fiber surface heating element according to an embodiment of the present invention. FIG. 3 is a photograph of an imbricated PCS fiber mold (mold) and an SiC fiber surface heating element in accordance with an embodiment of the present invention.

1 to 3, a method of manufacturing a SiC fiber surface heating element according to an embodiment of the present invention includes the steps of infusing PCS fiber with iodine gas; And charging the infusibilized PCS fibers into a thin, wide flat flat mold. According to another aspect of the present invention, there is provided a method of manufacturing a SiC fiber facet heating element, which comprises disposing the PCS fiber unfused according to the above method in one direction, multiple direction, and backward direction so as to effectively absorb the microwave. According to another embodiment of the present invention, there is provided a method for manufacturing a SiC fiber surface heating element, comprising the steps of stacking a plurality of molds for charging PCS fiber, .

The method of producing the SiC fiber surface heating element according to the present invention will be described in more detail. First, the PCS fiber (molecular weight Mw = 3000-4000), which is a polymer, is melt-spun by a conventional method. The prepared PCS fibers are charged into a constant heating chamber to heat the fibers at 200 to 300 ° C in a nitrogen atmosphere. At this time, a certain amount of iodine in a solid state is put together, and the mixture is heated to about 200 to 300 DEG C in a nitrogen atmosphere. When the temperature is heated to about 200 to 300 ° C., the iodine gasifies and reacts with the PCS fiber to induce the insolubilization of the PCS fiber and remains doped in the SiC fiber after the heat treatment.

As shown in FIGS. 2A and 2B, the PCS fibers, which have not been infused after the above process, are placed in a mold having a predetermined shape and heat-treated at a temperature of at least 1000 ° C. in an inert atmosphere to convert the polymer PCS fibers into SiC fibers When the PCS fiber is loaded into a mold having a certain shape, the PCS fibers are arranged in one direction, multiple direction, and backward direction. At the same time, the orientation of the PCS fibers can be controlled while crossing the PCS fibers in multiple layers.

In order to control the height of the charged part of the mold so as to control the height of the infused PCS fiber charged in the mold, it is possible to control the height of the charged part of the mold by controlling the shape of the mold, So that the SiC fiber surface heating element having the shape can be controlled.

2A, the first frame 10a includes a base 11 on which an accommodating space for accommodating PCS fibers insoluble on the upper side is accommodated, and a base 11 defining a receiving space at the edge of the base 10, And the base 11 of the second frame 10b is seated on the edge of the first step 12 so as to be insolubilized (Or size, area) of the base 11 of the second frame 10b at the edge of the seating portion 14 is limited to the height of the PCS fiber And a second step 16 for minimizing the movement of the second frame 10b. The first frame 10a and the second frame 10b may have the same structure and the second frame 10b may comprise only the base 11 to control the height of the insoluble PCS fibers.

2A, the height of the insoluble PCS fiber can be made to a desired height according to the positions of the first step 12 and the seating part 14. The first frame 10a (mold) And the height of the unfused PCS fiber which is charged and accumulated in the accommodating space in the first step 12 thus controlled can be controlled.

Thereafter, the shape of the mold (mold) is controlled so as to mass-produce the SiC fiber surface heating element, thereby making it possible to easily manufacture the SiC fiber surface heating element. For example, as shown in FIG. 2B, unfused PCS fibers are charged into the first frame 10a and the second frame 10b, which is an upper frame, is placed in the seating portion 14 of the first frame 10a, And the third frame 10c which is an upper frame is fixed to the seating part 14 of the second frame 10b by adjusting the height of the PCS fiber and charging the infiltrated PCS fiber into the receiving space of the second frame 10b, So that the shape of the mold can be controlled so that a plurality of SiC fiber surface heat emission elements can be manufactured at the same time by adjusting the height of the plurality of insoluble PCS fibers.

The SiC fiber surface heating element manufactured as described above has a shape suitable for application as a heating element, and thus an SiC fiber surface heating element optimized for rapid heating, clean heating, and relatively wide applicability is manufactured.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Claims (5)

Infusing the PCS fiber with iodine gas;
Charging the infiltrated PCS fibers into a planar mold so as to have at least one of the desired orientation, shape and thickness; And
Heat-treating the frame loaded with the infusibilized PCS fibers in an inert atmosphere,
Wherein the height of the unfused PCS fiber is adjusted by controlling the height of the charging part in the mold in the step of charging the unfused PCS fiber into the frame, and controlling the height of the unfused PCS fiber, Way Infusing the PCS fiber with iodine gas;
Charging the infiltrated PCS fibers into a planar mold so as to have at least one of the desired orientation, shape and thickness; And
Heat-treating the frame loaded with the infusibilized PCS fibers in an inert atmosphere,
The step of charging the infusibilized PCS fibers into a planar mold may include arranging the infusibilized PCS fibers in at least one direction of one direction, multi-direction, and so on, and adjusting the orientation of the PCS fibers while crossing the multi- ,
Wherein the height of the unfused PCS fiber is adjusted by controlling the height of the charging part in the mold in the step of charging the unfused PCS fiber into the frame, and controlling the height of the unfused PCS fiber, Way. Infusing the PCS fiber with iodine gas;
Charging the infiltrated PCS fibers into a planar mold so as to have at least one of the desired orientation, shape and thickness; And
Heat-treating the frame loaded with the infusibilized PCS fibers in an inert atmosphere,
Characterized in that a plurality of SiC fiber surface heating elements are manufactured at the same time by loading the unfused PCS fiber into the frame and then closing the upper frame and stacking a frame in which another unfused PCS fiber is loaded on the frame, A method of manufacturing a heating element. Infusing the PCS fiber with iodine gas;
Charging the infiltrated PCS fibers into a planar mold so as to have at least one of the desired orientation, shape and thickness; And
Heat-treating the frame loaded with the infusibilized PCS fibers in an inert atmosphere,
The step of charging the infusibilized PCS fibers into a planar mold may include arranging the infusibilized PCS fibers in at least one direction of one direction, multi-direction, and so on, and adjusting the orientation of the PCS fibers while crossing the multi- ,
Characterized in that a plurality of SiC fiber surface heating elements are manufactured at the same time by loading the unfused PCS fiber into the frame and then closing the upper frame and stacking a frame in which another unfused PCS fiber is loaded on the frame, Manufacturing method of heating element 3. The method according to claim 1 or 2,
And adjusting the height of the in-plane stepped portion to adjust the height of the infusible PCS fiber charged into the frame.

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