KR20230167685A - Transparent ceramic glass for cooktop and cooktop comprising same - Google Patents

Abstract

Transparent ceramic glass for a cooktop according to an embodiment includes a glass material having an uneven layer formed on the upper surface; an upper printing layer formed on the uneven layer; and a lower printed layer formed below the glass material.

Description

Transparent ceramic glass for cooktop and cooktop comprising same {Transparent ceramic glass for cooktop and cooktop comprising same}

The present invention relates to transparent ceramic glass for cooktops and cooktops including the same.

An induction device (induction heating device) is used as a heat source to generate heat. In particular, a cooktop (or hob) is used as a cooking device to heat food using an induction device.

Generally, ceramic glass with excellent heat resistance is used on the top of the cooktop. Ceramic glass rarely experiences thermal shock fracture and has excellent mechanical strength and thermal conductivity.

Ceramic glass can be divided into white, black, and transparent ceramic glass depending on its color. Among these, transparent ceramic glass has the problem of high visibility of scratches, which reduces aesthetics. In addition, transparent ceramic glass has a problem in that color deformation occurs due to high temperature due to poor color heat resistance.

In the past, attempts were made to solve the problem by forming a separate coating layer on transparent ceramic glass. However, transparent ceramic glass with a coating layer incurred additional costs for forming the coating layer and had limitations in overcoming scratch visibility.

The purpose of the present invention to solve the above problems is to provide transparent ceramic glass for cooktops that controls surface roughness to reduce scratch visibility while realizing excellent cleaning properties, and a cooktop including the same.

Transparent ceramic glass for a cooktop according to an embodiment includes a glass material having an uneven layer formed on the upper surface; an upper printing layer formed on the uneven layer; and a lower printed layer formed below the glass material.

A method of manufacturing transparent ceramic glass for a cooktop according to an embodiment includes manufacturing a ceramic glass precursor (Precursor); generating crystals by heating the ceramic glass precursor; Cooling the ceramic glass in which the crystals have been formed; Etching and blasting the cooled ceramic glass; Polishing the etched and blasted ceramic glass; and printing the polished ceramic glass.

A cooktop according to one embodiment includes a cooktop body; and a first glass provided on the upper part of the cooktop main body. The first glass may include ceramic glass. The ceramic glass includes a glass material having an uneven layer on the upper surface; an upper printing layer formed on the uneven layer; and a lower printed layer formed below the glass material.

According to an example of the disclosed invention, transparent ceramic glass for cooktops, which achieves excellent cleanability while reducing scratch visibility by realizing optimal surface roughness through etching, blasting, and polishing processes, and a cooktop including the same can be provided. there is.

However, the effects that can be achieved by the transparent ceramic glass for cooktops according to the embodiments of the present invention and the cooktop to which the same is applied are not limited to those mentioned above, and other effects not mentioned can be obtained from the description below. It will be clearly understandable to those with ordinary knowledge in the relevant technical field.

Figure 1 is a schematic diagram of transparent ceramic glass for a cooktop according to an embodiment.
Figure 2 is a flowchart of a method for manufacturing transparent ceramic glass for a cooktop according to an embodiment.
Figure 3 is an image taken of the transparent ceramic glass surface after etching and blasting.
Figure 4 is a diagram illustrating a cooktop according to one embodiment.
Figure 5 is an exploded perspective view of a cooktop according to one embodiment.
Figure 6 is a schematic diagram showing the scratch resistance test method.
Figure 7 is an image of the scratch test results for Comparative Example 4.
Figure 8 is an image of the scratch test results for Example 2.
Figure 9 is an image of the fingerprint visibility test results for Comparative Example 4.
Figure 10 is an image of the results of the fingerprint visibility test for Example 2.
Figure 11 is an image measuring the contact angle of transparent ceramic glass for a cooktop according to an embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the idea of the present invention to those skilled in the art. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. In order to clarify the present invention, the drawings may omit illustrations of parts unrelated to the description and may slightly exaggerate the sizes of components to aid understanding.

Throughout the specification, when a part is said to “include” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary.

Singular expressions include plural expressions unless the context clearly makes an exception.

Transparent ceramic glass for a cooktop according to an embodiment includes a glass material having an uneven layer formed on the upper surface; an upper printing layer formed on the uneven layer; and a lower printed layer formed below the glass material.

In addition, it may further include an outermost coating layer provided on the upper printed layer.

Figure 1 is a schematic diagram of transparent ceramic glass for a cooktop according to an embodiment.

Referring to FIG. 1, the transparent ceramic glass for a cooktop according to an embodiment may include a glass material having an uneven layer on the upper surface, an upper printed layer, and a lower printed layer.

The glass material may include, in weight percent, Li ₂ O: 3 to 10%, Al ₂ O ₃ : 15 to 25%, the remainder SiO ₂ and impurities.

Li ₂ O plays a role in improving the hardness of ceramic glass. Therefore, when the Li ₂ O content is low, it may be difficult to sufficiently secure the hardness of the ceramic glass. However, if the Li ₂ O content is excessive, manufacturing costs may increase.

Al ₂ O ₃ plays a role in improving the corrosion resistance and durability of ceramic glass. Therefore, when the content of Al ₂ O ₃ is low, the corrosion resistance and durability of the ceramic glass may be inferior. However, if the Al ₂ O ₃ content is excessive, manufacturing costs may increase.

SiO ₂ serves as a crystal nucleation agent in ceramic glass. Accordingly, when the content of SiO ₂ is low, crystals in the ceramic glass are not sufficiently formed and the reflectance may decrease. However, if the SiO ₂ content is excessive, the hardness and durability of ceramic glass may decrease.

In addition, unintended impurities from raw materials or the surrounding environment may inevitably be introduced during the normal manufacturing process, so this cannot be ruled out. Since these impurities are known to anyone skilled in the ordinary manufacturing process, all of them are not specifically mentioned in this specification.

In the ceramic glass according to an embodiment of the present invention, the glass material may have a thickness of 3 to 5 mm. However, it is not limited to this, and the thickness of the glass material may vary depending on the purpose and shape.

The upper print layer may include at least one of a UX print layer and a UI print layer. The upper printed layer may be formed to mark the center of the cooking pot on the upper part of the glass material. The upper printed layer may be formed in a straight or cross shape to indicate the center of the cooking pot, but is not limited thereto.

The lower printed layer may include a high-saturation color layer and a heat-resistant shielding layer.

The disclosed invention relates to transparent ceramic glass, which, unlike black ceramic glass and white ceramic glass, can implement various high-saturation colors. Therefore, by providing the high-saturation color layer below the transparent ceramic glass, vivid high-saturation colors can be realized.

The heat-resistant shielding layer may serve to improve the high-temperature heat resistance of transparent ceramic glass. Therefore, the transparent ceramic glass including the heat-resistant shielding layer can maintain a high chroma color even when exposed to high temperatures for a long period of time.

The heat-resistant shielding layer may be an inorganic printed layer containing at least one of C, Si, Ti, Cr, Cu, and Al.

The outermost coating layer provided on the upper printing layer may include at least one of an antifouling coating, an oleophobic coating, and an anti-fingerprint coating. By forming the outermost coating layer, the transparent ceramic glass for cooktops can have a contact angle with water of 90 degrees or more. In other words, cleaning performance can be improved by increasing the contact angle through the outermost coating layer.

The transparent ceramic glass for cooktops may have a surface roughness Ra value of 3 to 5 μm through etching, blasting, and polishing processes described later.

If the surface roughness Ra value is less than 3㎛, the visibility of scratches on the ceramic glass increases, which may reduce aesthetics. However, when the surface roughness Ra value exceeds 5㎛, the cleanability of ceramic glass may be poor. That is, the disclosed invention can simultaneously control scratch visibility and cleanability, which are trade-offs, by optimizing surface roughness.

The transparent ceramic glass for cooktops can improve aesthetics by providing the high-saturation color layer at the bottom of the transparent ceramic glass. More specifically, the transparent ceramic glass including a black color layer may have a color difference L value of 25 to 30, and the transparent ceramic glass including a dark gray color layer may have a color difference L value of 30 to 35. , transparent ceramic glass including silver and pink color layers may have a color difference L value of 65 to 70, and transparent ceramic glass including a beige color layer may have a color difference L value of 70 to 75.

The transparent ceramic glass for cooktops may have a transmittance of 10 to 95%. Therefore, the ceramic glass for the cooktop can utilize high transmittance, use an LCD substrate at the bottom, and implement various colors. Preferably, the transmittance may be 30 to 80%, and more preferably, the transmittance may be 60 to 70%.

The transparent ceramic glass for cooktops may have a gloss of 2 to 10 GU at 60 degrees. Therefore, the transparent ceramic glass for cooktops can reduce scratch visibility by implementing low gloss.

Next, a method for manufacturing transparent ceramic glass for cooktops according to another aspect of the present invention will be described.

A method of manufacturing transparent ceramic glass for a cooktop according to an embodiment includes manufacturing a ceramic glass precursor (Precursor); generating crystals by heating the ceramic glass precursor; Cooling the ceramic glass in which the crystals have been formed; Etching and blasting the cooled ceramic glass; Polishing the etched ceramic glass; and printing the polished ceramic glass.

Figure 2 is a flowchart of a method for manufacturing transparent ceramic glass for a cooktop according to an embodiment.

Referring to FIG. 2, the method of manufacturing transparent ceramic glass for a cooktop according to an example of the disclosed invention includes a series of ceramic glass precursor manufacturing steps, crystal generation steps, cooling steps, etching and blasting steps, and polishing. It may include steps and printing steps.

In addition, the method of manufacturing transparent ceramic glass for cooktops may further include forming an outermost coating layer to further improve cleanability, if necessary.

First, prepare ceramic glass powder, melt it at 1400 to 1600°C, and then cool it to room temperature at a cooling rate of 40°C/min or less to prepare a ceramic glass precursor.

Next, a crystal generation step is performed to generate crystals in the ceramic glass. The crystal generation step may include a primary heating step maintained at 600 to 800°C for 10 to 20 minutes and a secondary heating step maintained at 800 to 1000°C for 20 to 30 minutes.

In the first heating step, nuclei for crystallization within the ceramic glass are created, and in the second heating step, crystallization can proceed based on the nuclei.

If the temperature in the crystal generation step is too low or the holding time is short, the crystals may not be sufficiently created and color clarity and reflectivity may decrease. However, if the temperature of the crystal generation step is too high or the holding time is long, productivity may decrease. Therefore, it is desirable to set the temperature and holding time of the crystal generation step at an appropriate level.

A cooling step may be performed to lower the temperature of the ceramic glass that has undergone the crystal generation step to room temperature.

Next, etching and blasting the surface of the cooled ceramic glass can be performed.

Figure 3 is an image taken of the transparent ceramic glass surface after etching and blasting.

In the etching and blasting steps, an uneven layer can be formed by etching the surface of the ceramic glass. The etched and blasted ceramic glass may have a surface roughness Ra of 5 to 15㎛.

Referring to Figure 3, it can be seen that a uniform uneven layer was formed on the etched and blasted transparent ceramic glass surface.

The etching may be chemical etching. The etching can be performed by precipitation treatment of ceramic glass in hydrofluoric acid. More specifically, the etching may be performed by spraying hydrofluoric acid on the surface of the transparent ceramic glass at room temperature and then precipitating the transparent ceramic glass in hydrofluoric acid for 60 to 180 minutes.

The blasting step can be performed using diamond or diamond + boron cabide.

Next, a step of polishing the etched and blasted ceramic glass may be performed. The polishing step may be performed for 5 to 10 minutes. The surface roughness Ra value of the ceramic glass that has undergone the polishing step may be 3 to 5 ㎛.

Thereafter, the polished ceramic glass may be subjected to printing to form upper and lower printed layers.

The upper print layer may include at least one of a UX print layer and a UI print layer. The lower printed layer may include a high-saturation color layer and a heat-resistant shielding layer.

In the outermost coating layer forming step, at least one of an antifouling coating, an oleophobic coating, and an anti-fingerprint coating may be formed.

Next, a cooktop according to another aspect of the disclosed invention will be described.

A cooktop according to one embodiment includes a cooktop body; and a first glass provided on an upper portion of the cooktop main body, wherein the first glass includes a ceramic glass; wherein the ceramic glass includes a glass material having an uneven layer formed on an upper surface; an upper printing layer formed on the uneven layer; and a lower printed layer formed below the glass material.

Additionally, the cooktop body includes a heater, and the cooktop includes a second glass disposed on the same line as the first glass; A coupling device provided to detachably couple the first glass and the second glass; a circuit board disposed below the second glass; and a coil seating plate disposed below the heater to seat the heater.

It may further include an outermost coating layer provided on top of the upper printed layer, and the lower printed layer may include a high-saturation color layer and a heat-resistant shielding layer, and the ceramic glass may have a surface roughness Ra value of 3. It may be 5 ㎛ to 5 ㎛, and the ceramic glass may have a transmittance of 10 to 95%.

The description of the glass material is as described above, and the cooktop will be described in more detail below.

A cooktop according to an embodiment of the present invention includes a cooktop body; and a first glass provided on an upper portion of the cooktop body, wherein the first glass may include ceramic glass.

Additionally, the cooktop body includes a heater, and the cooktop includes a second glass disposed on the same line as the first glass; A coupling device provided to detachably couple the first glass and the second glass; a circuit board disposed below the second glass; and a coil seating plate disposed below the heater to seat the heater.

FIG. 5 is a diagram illustrating a cooktop according to an example of the present invention, and FIG. 6 is an exploded perspective view of a cooktop according to an example of the present invention.

Referring to Figures 5 and 6, the cooktop 1 according to an example of the present invention may include a cooktop body 10 and a first glass 110 provided on the cooktop body 10. .

In addition, the cooktop 1 according to an example of the present invention includes a heater (hereinafter, induction heating coil 11), a second glass 120, a coupling device 200, a circuit board 12, and a coil mounting plate ( 15) may be included.

The main body 10 can form the exterior of the cooking appliance 1. The induction heating coil 11 is accommodated inside the main body 10 and can generate a magnetic field to induction heat the cooking vessel 2. The induction heating coil 11 may be electrically connected to a main board (not shown) provided inside the main body 10 through a wire 11a.

The glass 100 may include first glass 110 forming the first area 101 and second glass 120 forming the second area 102.

The circuit board 12 may be placed below the second glass 120 . The circuit board 12 may include a display unit 13 and a touch unit 14. The display unit 13 may be disposed below the display unit 102a formed in the second area 102. The display unit 13 can display whether the cooking vessel 2 is heated by the induction heating coil 11. Accordingly, the user can check whether the cooking vessel 2 is heated through the display unit 102a. The touch unit 14 may be disposed below the input unit 102b formed in the second area 102. The touch unit 14 can receive a touch signal from the input unit 102b. For example, the touch unit 14 may receive input using a capacitive touch method. However, it is not limited to this, and the touch unit 14 can also receive input through a pressure-sensitive touch method. The user can adjust the current flowing through the induction heating coil through the input unit 102b and determine the degree to which the cooking vessel 2 is heated.

The induction heating coil 11 may be seated on the coil seating plate 15. The coil seating plate 15 may be provided with a coil seating hole 15a for seating the induction heating coil 11. A plurality of coil seating holes 15a may be provided.

The main body 10 may further include a first frame 16 to support the glass 100. The first frame 16 may be provided to support the glass 100 at the top. The first frame 16 may be formed to extend upward from all four ends of the coil seating plate 15. The first frame 16 is provided so that the glass 100 can be seated and supported on the main body 10.

The first glass 110 includes an upper printed layer (heating area guide, 101a, 101b, 101c) and can support the cooking container 2. A cooking vessel 2 may be placed in the first area 101.

The second glass 120 includes a second area 102, and the second area 102 may include a display unit 102a and an input unit 102b. The display unit 102a may be formed in the second area 102 to display various information about the cooking appliance 1, and the input unit 102b may be formed in the second area 102 to receive control commands from the user. .

The first glass 110 and the second glass 120 are physically separated and can be separably coupled by the coupling device 200. The first glass 110 and the second glass 120 may be separably coupled to each other using a coupling device 200.

The first glass 110 forms a first area 101, and the cooking vessel 2 may be placed in the first area 101. The cooking vessel 2 placed on the first glass 110 may be inductively heated by a magnetic field generated by the induction heating coil 15.

The second glass 120 forms a second area 102 separated from the first area 101, and in the second area 102, the temperature of the cooking vessel 2 and the elapsed cooking time are displayed through the display unit 102a. and/or cooking information of the cooking appliance 1 including date/time may be displayed.

Additionally, the second area 102 may be provided with an input unit 102b that receives a control command from the user to turn on/off the cooking appliance 1 or control the temperature of the cooking vessel 2. The input unit 102b can receive input through the user's touch.

The second glass 120 may be tempered glass. The first glass 110 and the second glass 120 may be formed of different materials. For example, the first glass 110 may be made of ceramic glass with excellent heat resistance, and the second glass 120 may transmit a touch signal to the circuit board 12 provided below through touch. It can have characteristics.

The first glass 110 and the second glass 120 may be separably coupled to each other by the coupling device 200. Specifically, the second glass 120 can be detachably coupled to the first glass 110 by the coupling device 200. The second glass 120 may be coupled to the front of the first glass 110. The second glass 120 may cover one side of the first glass 110 when combined with the first glass 110.

In addition, in case of repair or breakdown of the circuit board 12 located in the second area 102, the second glass 120 corresponding to the second area 102 can be separated and replaced, thereby facilitating after-sales service. can do.

Below, examples and comparative examples are described to aid understanding of the present invention. However, the following description only corresponds to an example of the content and effects of the present invention, and the scope and effects of the present invention are not necessarily limited thereto.

{Example}

<Scratch resistance test>

Table 1 below shows the vertical force at the time of scratch occurrence in Comparative Examples and Examples.

Comparative Example 1 is transparent ceramic glass without a coating, Comparative Example 2 is transparent ceramic glass with an ALSiN coating layer, Comparative Example 3 is transparent ceramic glass with a DLC coating layer, and Example 1 has an uneven layer according to an embodiment. It is a transparent ceramic glass.

The scratch resistance test was performed as a variable load scratch test.

Figure 7 is a schematic diagram showing the scratch resistance test method.

Referring to Figure 7, the variable load scratch test as a scratch resistance test method was measured using Fischerscope-HM2000 equipment in accordance with ASTM c-1624-05 Scratch Testing. At this time, the vertical force applied to the specimen was constantly increased from 0.5N to 20N, and the scratch behavior was observed through an optical or electron microscope while moving the specimen at a speed of 240 mm/s.

division Vertical force at the time of scratch occurrence
(N) Comparative Example 1 11.5 Comparative example 2 12.2 Comparative example 3 13.0 Example 1 17.0

Referring to Table 1, it was confirmed that Comparative Examples 2 and 3 with a coating layer had better scratch resistance than Comparative Example 1 without a coating layer. However, it was found that Example 1 had the best scratch resistance by forming an uneven layer rather than a coating layer.

<Scratch visibility test>

Table 2 below shows the surface roughness Ra and scratch visibility of comparative examples and examples.

Comparative Example 4 is transparent ceramic glass without coating and the lower printed layer color is black, and Comparative Example 5 is transparent ceramic glass without coating and the lower printed layer color is pink. Example 2 is a transparent ceramic glass with an uneven layer and a black lower printed layer, and Example 3 is a transparent ceramic glass with an uneven layer and a pink lower printed layer.

Surface roughness Ra was measured by measuring the vertical movement of a stylus moving perpendicular to the specimen measurement surface using a surface roughness meter at room temperature (25°C).

In the scratch visibility test, the sandpaper was reciprocated at 100 rpm using an abrasion tester, and then the degree of scratches was observed using an optical microscope. At this time, if the scratch width exceeds 5mm, it is Lv.1, if the scratch width is between 2.5mm and 5mm or less, it is Lv.2, if the scratch width is between 1.0mm and 2.5mm, it is Lv.3, and the scratch width is 0.1mm. If the scratch width is less than 1.0mm, it is indicated as Lv.4, and if the scratch width is less than 0.1mm, it is indicated as Lv.5.

division Surface roughness Ra
(㎛) Number of sandpaper round trips
(episode) Test result Comparative example 4 0.05 One Lv.1 10 Lv.1 25 Lv.1 50 Lv.1 Comparative Example 5 0.01 One Lv.3 10 Lv.3 25 Lv.3 50 Lv.3 Example 2 4.85 One Lv.5 10 Lv.5 25 Lv.5 50 Lv.5 Example 3 4.73 One Lv.5 10 Lv.5 25 Lv.5 50 Lv.5

Referring to Table 2, when comparing Comparative Example 4 and Comparative Example 5, it was found that the transparent ceramic glass with a black lower printed layer had a high reflectivity and thus high scratch visibility. In other words, it was confirmed that the higher the reflectance, the higher the scratch visibility.

In addition, in Comparative Examples 4 and 5, the surface roughness was too low and the scratch visibility was high, but in Examples 2 and 3, the surface roughness was optimized by forming an uneven layer, thereby lowering the scratch visibility.

FIG. 8 is an image showing the scratch test results for Comparative Example 4, and FIG. 9 is an image showing the scratch test results for Example 2. Referring to Figures 8 and 9, it can be seen that the transparent ceramic glass according to one embodiment has significantly low scratch visibility by forming an uneven layer.

<Fingerprint visibility test>

Table 3 below shows the degree of gloss and fingerprint visibility of comparative examples and examples.

Glossiness, ASTM D523. Measurements were made according to D2457, at room temperature, at a measuring angle of 60°, using a gloss meter with model name BYK #4446.

The degree of fingerprint visibility was indicated by pressing the comparative example and example specimens with a finger for 10 seconds and then measuring the color difference value (△E) between the part pressed by the finger and the part not pressed.

The color difference value (△E) was measured using the L*a*b* color difference meter and Spectrophotometer CM-2600d.

division Glossiness
(GU) Color difference value Comparative example 4 92.3 1.5 Comparative Example 5 106 1.2 Example 2 4.2 0.1 Example 3 2.5 0.1

Referring to Table 3, Comparative Examples 4 and 5 showed very high gloss, and the color difference between the part pressed by the finger and the part not pressed was measured to be relatively large. That is, Comparative Examples 4 and 5 had high fingerprint visibility.

However, Examples 2 and 3 including the uneven layer showed low gloss, and the color difference value between the part pressed by the finger and the part not pressed was very low. That is, Examples 2 and 3 had low fingerprint visibility.

Figure 10 is an image of the fingerprint visibility test results for Comparative Example 4, and Figure 11 is an image of the fingerprint visibility test results for Example 2.

Referring to Figures 10 and 11, it can be seen that the transparent ceramic glass according to one embodiment has significantly low fingerprint visibility by forming an uneven layer.

<Cleanability evaluation>

The cleaning property was evaluated by applying cooking oil to a portion of the surface of the specimens of Example 2 and Comparative Example 6, heating them at 220°C for 30 minutes, and measuring the color difference value (ΔE) before and after heating.

Comparative Example 6 is a transparent ceramic glass with a surface roughness Ra value of 7 ㎛ because no polishing step was performed.

Example 2 showed a color difference value (△E) of 0.6, while Comparative Example 6 showed a color difference value (△E) of 1.5. In other words, it was confirmed that the transparent ceramic glass according to one embodiment has excellent cleanability by optimizing the surface roughness through a polishing process.

<Heat resistance evaluation>

Heat resistance evaluation was performed by heating the specimens (width 100 mm It was shown.

Example 3 had a heat-resistant shielding layer, so the color difference value (△E) was 0.4, whereas Comparative Example 5 did not have a heat-resistant shielding layer, so the color difference value (△E) was 1.35. That is, it was confirmed that the transparent ceramic glass according to one embodiment has excellent heat resistance as there is almost no color change even when exposed to high temperatures for a long time through the heat-resistant shielding layer.

<Contact angle measurement test>

The contact angle measurement test was measured by dropping 1.0 μl of water on the specimen at room temperature (25°C) using contact angle measuring equipment from KRUSS.

Figure 12 is an image measuring the contact angle of transparent ceramic glass for a cooktop according to an embodiment.

Referring to FIG. 12, the transparent ceramic glass for a cooktop according to one embodiment had a contact angle with water of 90 degrees or more by forming an outermost coating layer. That is, the transparent ceramic glass for cooktops according to one embodiment can further improve cleaning properties by increasing the contact angle.

1: Cooktop 10: Cooktop body
20: Ceramic glass

Claims (20)

A glass material in which an uneven layer is formed on the upper surface;
an upper printing layer formed on the uneven layer; and
A transparent ceramic glass for a cooktop, including a lower printed layer formed on the lower part of the glass material. According to paragraph 1,
Transparent ceramic glass for a cooktop, further comprising: an outermost coating layer provided on the upper printing layer. According to paragraph 1,
The glass material is,
Transparent ceramic glass for cooktops, with a thickness of 3 to 5 mm. According to paragraph 1,
The upper printed layer is,
Transparent ceramic glass for cooktops, including at least one of a UX printed layer and a UI printed layer. According to paragraph 1,
The lower printed layer is,
Transparent ceramic glass for cooktops, including a high-chroma color layer and a heat-resistant shielding layer. According to paragraph 4,
The heat-resistant shielding layer is,
Transparent ceramic glass for cooktops, which is an inorganic printing layer containing at least one of C, Si, Ti, Cr, Cu, and Al. According to paragraph 1,
Transparent ceramic glass for cooktops with a surface roughness Ra value of 3 to 5 ㎛. According to paragraph 1,
Transparent ceramic glass for cooktops with a transmittance of 10 to 95%. According to paragraph 1,
Transparent ceramic glass for cooktops with a 60-degree gloss of 2 to 10 GU. According to paragraph 2,
Transparent ceramic glass for cooktops with a contact angle with water of 90 degrees or more. Manufacturing a ceramic glass precursor (Precursor);
generating crystals by heating the ceramic glass precursor;
Cooling the ceramic glass in which the crystals have been formed;
Etching and blasting the cooled ceramic glass;
Polishing the etched and blasted ceramic glass; and
A method of manufacturing transparent ceramic glass for a cooktop, including the step of printing the polished ceramic glass. According to clause 11,
The etching step is,
A method of manufacturing transparent ceramic glass for a cooktop, performed by precipitation in hydrofluoric acid for 60 to 180 minutes. According to clause 11,
A method of manufacturing transparent ceramic glass for a cooktop, wherein the etched and blasted ceramic glass has a surface roughness Ra of 5 to 15 ㎛. Cooktop body; and
It includes a first glass provided on the upper part of the cooktop body,
The first glass includes ceramic glass,
The ceramic glass is,
A glass material in which an uneven layer is formed on the upper surface;
an upper printing layer formed on the uneven layer; and
A cooktop comprising: a lower printed layer formed on the lower part of the glass material. According to clause 14,
The cooktop body includes a heater,
The cooktop is,
a second glass disposed on the same line as the first glass;
A coupling device provided to detachably couple the first glass and the second glass;
a circuit board disposed below the second glass; and
A cooktop including; a coil seating plate disposed below the heater to seat the heater. According to clause 14,
A cooktop further comprising: an outermost coating layer provided on top of the upper printed layer. According to clause 14,
The lower printed layer is,
A cooktop containing a high-chroma color layer and a heat-resistant shielding layer. According to clause 17,
The heat-resistant shielding layer is,
A cooktop, which is an inorganic printed layer containing at least one of C, Si, Ti, Cr, Cu, and Al. According to clause 14,
The ceramic glass is,
A cooktop with a surface roughness Ra value of 3 to 5 μm. According to clause 14,
The ceramic glass is,
A cooktop with a transmittance of 10 to 95%.