KR20170096246A - Composition including stone sludge used for manufacturing porous ceramic panel and porous ceramic panel manufactured using the same - Google Patents

Composition including stone sludge used for manufacturing porous ceramic panel and porous ceramic panel manufactured using the same Download PDF

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KR20170096246A
KR20170096246A KR1020160016948A KR20160016948A KR20170096246A KR 20170096246 A KR20170096246 A KR 20170096246A KR 1020160016948 A KR1020160016948 A KR 1020160016948A KR 20160016948 A KR20160016948 A KR 20160016948A KR 20170096246 A KR20170096246 A KR 20170096246A
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porous ceramic
ceramic panel
parts
clay
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KR101909079B1 (en
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박선민
오유근
박일주
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한국세라믹기술원
재단법인 거창화강석연구센터
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/04—Clay; Kaolin
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/13—Compounding ingredients
    • C04B33/131—Inorganic additives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/14—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements stone or stone-like materials, e.g. ceramics concrete; of glass or with an outer layer of stone or stone-like materials or glass
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/08—Flooring or floor layers composed of a number of similar elements only of stone or stone-like material, e.g. ceramics, concrete; of glass or with a top layer of stone or stone-like material, e.g. ceramics, concrete or glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/42—Pore formers

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  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The present invention relates to a resin composition for producing porous ceramic panels. More specifically, the present invention relates to a resin composition for producing porous ceramic panels, containing i) 30-60 parts by weight of clay; ii) 35-45 parts by weight of stone dust sludge; and iii) 5-20 parts by weight of a pore former.

Description

TECHNICAL FIELD The present invention relates to a porous ceramic panel and a porous ceramic panel using the porous ceramic panel.

The present invention relates to a porous ceramic panel and a porous ceramic panel using the porous ceramic panel, and more particularly, to a porous ceramic panel having a porous ceramic panel and a porous ceramic panel using the porous ceramic panel.

 Recently, the development of the stone and aggregate industry has been radically improved, but it is becoming a main cause of environmental pollution due to the generation of dust and stone dust sludge.

 About 30 ~ 60% of the stone is generated as waste in the quarrying and processing of stones in the quarries and processing enterprises, and the annual waste is 62,500M / T and the stone is 21,250M / T.

 Waste stone is recycled as aggregate without any special treatment, but there is no clear treatment for stone. The method of disposal of the waste of the stone is recycled as the embankment at the time of using the waste collection and processing company or the construction of the large-scale complex, and the cost for processing it is a big burden for the stone processing company.

 It has been reported in various research results that it can be used in fields such as farmland soil, brick, and modified concrete as the treatment plan so far.

 Unlike general recycling methods that have been promoted in the past, recycling of stone sludge that can meet the social demands of environment problem solving and recycling of resources has been used as a raw material for ceramic panels used in industry and recycled. High development is urgently required.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a paving composition which can be used for the production of porous ceramic panels containing stone dust sludge so as to satisfy environment problems and resource recycling at the same time, .

In order to accomplish the above object, the present invention provides a method for producing a clay comprising i) 30 to 60 parts by weight of clay; ii) 35 to 45 parts by weight of stone powder sludge; And iii) 5 to 20 parts by weight of a pore-forming agent.

In addition, the clay is SiO 2 55 ~ 65% by weight; 15 to 25 wt% of Al 2 O 3 ; 1 to 5% by weight of Na 2 O; 0.1 to 1% by weight of K 2 O; 0.1 to 1% by weight of CaO; 0.1 to 1% by weight of MgO; 1 to 3% by weight of Fe 2 O 3 ; And 0.1 to 0.5% by weight of Ti 2 O 2, based on the total weight of the porous ceramic panel.

Also, the abrasive contained in the abrasive sludge has the same mineral composition as the granodiorite, 65 to 75 wt% of SiO 2 ; 10 to 20% by weight of Al 2 O 3 ; 1 to 5% by weight of Na 2 O; 1 to 5% by weight of K 2 O; 1 to 3% by weight of CaO; 0.1 to 1% by weight of MgO; 1 to 3% by weight of Fe 2 O 3 ; And 0.1 to 1% by weight of Ti 2 O 2, based on the total weight of the porous ceramic panel.

The pore former may be selected from the group consisting of diatomaceous earth, polyacrylonitrile, PMMA (poly (methyl methacrylate)), glass hollow microsphere, hollow fly-ash, HAp (hydroxyapatite) hollow body, carbon black, starch ) And polystyrene. The present invention also provides a composition for forming a porous ceramic panel.

The present invention further provides a base composition for producing a porous ceramic panel, which further comprises a glass frit.

The present invention further provides a substrate composition for manufacturing a porous ceramic panel, which further comprises an antibacterial substance.

In another aspect of the present invention, there is provided a method for producing a cement composition, comprising: (a) i) 30 to 60 parts by weight of clay; ii) 35 to 45 parts by weight of stone powder sludge; And iii) 5 to 20 parts by weight of a pore-forming agent; obtaining a slurry for preparing a porous ceramic panel; (b) forming a formed body at a molding pressure of 30 to 200 kg / cm 2 using the slurry for producing a porous ceramic panel obtained in the step (a); (c) drying the molded body obtained in the step (b); And (d) firing the molded body dried in the step (c).

According to another aspect of the present invention, there is provided a porous ceramic panel manufactured using the substrate composition for manufacturing the porous ceramic panel.

The present inventive composition for recycling the recycled stone sludge, which has been classified as waste and has a problem in terms of disposal cost, for manufacturing a porous ceramic panel, can increase utilization of exhausted resources, And can be usefully used for manufacturing porous ceramic panels which can be used for interior tiles having excellent mechanical properties, high absorption rate, far infrared ray emissivity, and various colors.

Figs. 1 (a) to 1 (c) are the result of particle size analysis of the starting materials for preparing the base composition, ie, geosynthetic stone, loamy earth and diatomaceous earth (FA).
Figs. 2 (a) to 2 (c) are XRD analysis results for the starting materials for preparing the base composition, ie, geosynthetic stone, loamy earth and diatomaceous earth (FA).
FIG. 3 is a photograph showing a firing specimen of the starting material by temperature.
Figs. 4 (a) and 4 (b) are graphs of plastic shrinkage ratios by firing temperature of raw organs and graphs of absorption rates at firing temperatures, respectively.
Fig. 5 is a photograph showing the firing specimen of the starting material according to the temperature.
Fig. 6 (a) and Fig. 6 (b) are graphs of the plasticity shrinkage ratio graphs of the starting materials by sintering temperature, respectively.
Fig. 7 is a photograph showing fired specimens according to firing temperatures obtained using the respective substrate compositions.
Figs. 8 (a) and 8 (c) are graphs showing the plastic shrinkage ratio, the absorptivity and the bending strength according to the firing temperature of the fired test piece produced using the base composition, respectively.
9 is a flow chart illustrating the steps of manufacturing a porous ceramic panel by firing temperature used in this embodiment.
10 is a curve showing the profile of the firing process in the production of a porous ceramic panel in this embodiment.
11 is a photograph showing a porous ceramic panel according to the calcination temperature manufactured in this embodiment.

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.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It should be understood, however, that the embodiments according to the concepts of the present invention are not intended to be limited to any particular mode of disclosure, but rather all variations, equivalents, and alternatives falling within the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Hereinafter, the present invention will be described in detail.

A base composition for producing a porous ceramic panel according to the present invention comprises i) 30 to 60 parts by weight of clay; ii) 35 to 45 parts by weight of stone powder sludge; And iii) 5 to 20 parts by weight of a pore-forming agent.

The clay is SiO 2 55 ~ 65% by weight; 15 to 25 wt% of Al 2 O 3 ; 1 to 5% by weight of Na 2 O; 0.1 to 1% by weight of K 2 O; 0.1 to 1% by weight of CaO; 0.1 to 1% by weight of MgO; 1 to 3% by weight of Fe 2 O 3 ; And 0.1 to 0.5% by weight of Ti 2 O 2 .

In addition, the substrate composition for producing a porous ceramic panel according to the present invention may contain white clay or loess other than the clay as a base material, and may also include a material used as a base material for forming a porous ceramic panel.

The abrasive contained in the abrasive sludge has the same mineral composition as the granodiorite, 65 to 75% by weight of SiO 2 ; 10 to 20% by weight of Al 2 O 3 ; 1 to 5% by weight of Na 2 O; 1 to 5% by weight of K 2 O; 1 to 3% by weight of CaO; 0.1 to 1% by weight of MgO; 1 to 3% by weight of Fe 2 O 3 ; And 0.1 to 1% by weight of Ti 2 O 2 .

 For reference, the stone produced by granite processing in Geochang area, Gyeongsangnam-do, has a mineral composition of typical granodiorite of geomangite granite, and it has an off-white to dark-colored main mineral including quartz, plagioclase, alkali feldspar and biotite, It is not necessary to crush the ore, and there is no harmful substance. Therefore, it can be said that it is a very useful resource economically in terms of recycling.

The pore former may be selected from the group consisting of diatomaceous earth, polyacrylonitrile, PMMA (poly (methyl methacrylate)), glass hollow microsphere, hollow fly-ash, HAp (hydroxyapatite) hollow body, carbon black, starch ), And polystyrene.

In particular, the diatomaceous earth has a porosity rich in absorbency, which is preferable as a pore former raw material and can further improve the hygroscopic function of the porous ceramic panel.

If the content of the pore-forming agent is less than 5 parts by weight, porosity and weight reduction as much as expected can not be achieved, and when the content of the pore-forming agent is less than 20 parts by weight The excess pore formation causes a problem that the plasticity of the substrate is lowered and the strength after firing is lowered.

Furthermore, the substrate composition for producing a porous ceramic panel according to the present invention may further comprise glass frit.

Glass frit starts to melt at a temperature of about 700 ° C, which is lower than the firing temperature of a general ceramic panel as a low-melting glass, facilitates the movement between particles during the firing process of the panel, and enhances the strength of the porous ceramic panel by acting as an adhesive, It plays a role.

However, if excessive amount of glass frit is contained, it is preferable to add the glass frit in an amount of 10 parts by weight or less, since it will block the pores exhibiting the moisture absorptive and desorptive property on the surface of the porous ceramic panel.

In addition, the substrate composition for producing a porous ceramic panel according to the present invention may further comprise an antimicrobial substance having an antimicrobial activity.

When a porous ceramic panel including an antimicrobial substance is formed, it is possible to impart antimicrobial properties to the porous ceramic panel through the modified antimicrobial active material through the manufacturing process of the porous ceramic panel. When the porous ceramic panel is used at room temperature, moisture can be absorbed through the pores included in the porous ceramic panel, and moisture can be brought into contact with the antibacterial substance uniformly distributed on the porous ceramic panel. Chemical changes may occur in the antimicrobial substance modified through contact with moisture, thereby imparting alkalinity to the pore surface of the porous ceramic panel, thereby exhibiting antibacterial performance. The bacterial and fungal growth can be suppressed by the antimicrobial properties of the porous ceramic panel and the generation of airborne microorganisms in the indoor air can be reduced and a pleasant environment of the room can be maintained.

At this time, the antimicrobial substance may be a metal carbonate such as calcium carbonate, potassium carbonate, barium carbonate, magnesium carbonate, sodium carbonate and the like.

Porous ceramic panel fabrication using the above-described composition can be accomplished through the following manufacturing process.

(A) i) 30 to 60 parts by weight of clay; ii) 35 to 45 parts by weight of stone powder sludge; And iii) 5 to 20 parts by weight of a pore-forming agent; obtaining a slurry for preparing a porous ceramic panel; (b) forming a formed body using the slurry for preparing a porous ceramic panel obtained in the step (a); (c) drying the molded body obtained in the step (b); And (d) firing the molded body that has been dried in the step (c) to produce a porous ceramic panel.

In the step (a), the slurry may be uniformly mixed with the clay, the stone dust sludge and the pore-forming agent to form the slurry. However, the method of performing the slurry is not particularly limited. For example, i ) 30 to 60 parts by weight of clay; ii) 35 to 45 parts by weight of stone powder sludge; And iii) 5 to 20 parts by weight of a pore-forming agent are added to the mixture, followed by uniformly mixing through a milling process to obtain a slurry. At this time, this step can be performed by a known milling method such as a ball mill, a planetary mill, and an attrition mill.

The step (b) is a step of producing a molded body having a panel shape to be finally produced by using the slurry obtained in the step (a).

The step (c) is a step of drying the molded body manufactured in the step (b) according to a method known in the art.

The step (d) is a step of firing the molded article dried in the step (c), and the firing in the step (d) is preferably performed at a temperature of 1000 to 1200 ° C for 10 minutes to 24 hours under air atmosphere.

The above-described substrate composition for manufacturing a porous ceramic panel according to the present invention can recycle the stone sludge, which is classified as waste and has a problem of a lot of processing cost, for the production of a porous ceramic panel, It can contribute to the activation of related industries.

Since the fine grains contained in the stone sludge are very fine in size, they do not need to be ground again when used as a ceramic building material. When used as a substitute for feldspar, they have excellent physical properties and are used in applications such as built- Which can be used as a porous ceramic panel.

Hereinafter, the present invention will be described in detail based on examples. The presented embodiments are illustrative and are not intended to limit the scope of the invention.

<Examples>

In this Example, a base composition for producing porous ceramic panels was prepared by using geosane, loam, and diatomaceous earth as starting materials for preparing a composition for producing a porous ceramic panel, respectively, as a stone dust sludge, a clay and a pore forming agent, Porous ceramic panels were fabricated.

1. Evaluation and selection of starting materials

(1) Starting material

In this experiment, we used a large amount of waste stone as a main raw material in the geosynthetic stone complex, and used a raw clay as a molding agent and a porous ceramic panel using diatomaceous earth FA as a starting material as a pore forming agent. Respectively.

(2) Raw material treatment

The raw materials for the development of the composition were weighed in accordance with the desired composition of the raw materials of the starting materials: stone, clay and diatomite, and homogeneously mixed for 3 hours in a 3L pot mill at the ratio of raw material: corner: water = 1: 1: 1 And treated with a 200Mesh standard netting with a residual rate of 0.5% or less. The following mixed samples were thoroughly dried at 100 ± 5 ° C for 3 hours in a drier and passed through a 60 mesh sieve of standard netting. Then, 8% of water was added and aged for 24 hours. Then, the mixture was further processed into a 14-Mesh sieve to prepare granular powder for molding.

(3) Evaluation of raw material properties of starting materials

The chemical components, particle size and X-ray diffraction of the starting materials to be used in this Example were measured and the results are shown in Tables 1 to 3.

As shown in the chemical analysis results of each raw material in Table 1, the main component was silica, and the alumina component (Na 2 O + K 2 O) was 8.10%, which was higher than that of the other raw materials. Thus, And the clay loam is expected to be able to be used as plasticity and coloring agent raw material as a raw siliceous material with an Ig loss of 6.98% and Fe 2 O 3 of 6.85%. Diatomaceous earth can be used as a pore forming material containing micropores of 91.9% of SiO 2 .

[Table 1] Chemical composition analysis results for starting materials

Figure pat00001

The particle size of the starting material was analyzed. As a result of analyzing each raw material, it was found that most of the gypsum powder passed through 325 mesh was 92.03%, and the amount of particles remaining in the 100mesh sieve was 7.39%, and diatomaceous earth FA was 0.72% left. And 200 / 325mesh remaining in 325mesh with 200mesh was the most with 10.40%. Samples passed through a 325 mesh sieve for each raw material were measured with a laser particle size analyzer. As a result, the average grain size was the largest at 16.76 ㎛ for diatomite particles, and 6.26 ㎛ for the loamy soil.

[Table 2] Particle size analysis results of starting materials

Figure pat00002

   X-ray diffraction analysis was performed to confirm the crystalline phase of the starting material. The major claystone was identified as α-Quartz, Albite as silica and feldspar system, and the crushed stone as muscovite. The primary clay loam was montmorillonite, which is a secondary sedimentary clay. Muscovite and kaolinite Crystalline phase. Diatomaceous earth (FA) was identified only in the main crystalline phase of α-Cristobalite.

 [Table 3] X-ray diffraction (XRD) results

Figure pat00003

(4) Evaluation of plasticity of starting materials

1) Characterization of high-temperature plasticity (for porcelain-floor panels) of starting materials

Dried granite and gypsum samples were fabricated and sintered at elevated temperatures of 1140 ℃, 1170 ℃ and 1200 ℃, respectively, at 30 ℃ intervals to evaluate the sintering condition and physical properties. As a result of this analysis, In order to meet the firing conditions of the porous ceramic plate by the secondary firing test, dried zeolite, fine clay lozenges and diatomaceous earth FA molded specimens were fired at firing temperatures of 1000 ° C., 1050 ° C. and 1100 ° C. At this time, And the temperature was increased from 2 ℃ / min to 100 ℃ and the maximum temperature firing temperature was fired at a rate of 5 ℃ / min. Then, after 1 hour at the maximum firing temperature, it was cooled to room temperature.

The firing specimens of the fired starting materials according to the temperature are shown in Fig. In addition, the physical properties of each starting material were measured by temperature, that is, the plastic shrinkage ratio and the plastic absorption rate were measured and shown in Tables 4, 4 (a) and 4 (b).

As shown in Table 4, the firing shrinkage was the highest at 1540% at 1140 ℃, and the shrinkage increased as the temperature increased. The clay was 7.88%, which caused shrinkage of about 50%, and the plastic shrinkage increased with increasing temperature. After firing at each temperature, the absorption rate of the specimens was less than 1% and the clay content was 4.88% at 1140 ℃ and less than 1% at 1200 ℃. Therefore, it can be seen that at high temperature calcination, the stone acts as a flux and the clay acts as a molding binder.

[Table 4] Firing shrinkage and absorption rate results of starting materials

Figure pat00004

2) Characterization of low-temperature plasticity of starting materials

The starting materials were calcined at 1000 ° C, 1050 ° C and 1100 ° C, respectively, to confirm the low-temperature calcination (porcelain quality - for a built-in panel). The calcined specimens were shown in Fig. Table 5 shows the results of the plastic shrinkage and the absorptance for each temperature at low temperature firing, and the graphs thereof are shown in Figs. 6 (a) and 6 (b). As can be seen from the tables and graphs, the plastic shrinkage ratio of the larch and loamy clay was increased as the firing temperature was increased. In the case of diatomaceous earth, the shrinkage rate was not significantly changed. In addition, the absorption rate of clay and ash was less as the temperature increased, and the absorption rate of diatomite was very high. Therefore, it can be seen that the role of porosity formation is diatomaceous earth, the role of strength and flux is in the form of geosane, and clay is in strength and molding binder. Therefore, we tried to develop a ceramic ceramic panel by combining these three raw materials with proper composition.

[Table 5] Firing Absorption Rate and Shrinkage Result of Starting Material

Figure pat00005

2. Preparation and evaluation of substrate composition

(1) Possession combinations

  In order to increase the porosity in the porous ceramic panel, the combination and evaluation were carried out. The composition was changed to 40 wt.% To 40 wt.%, And to 40 wt.% To 55 wt.%, And the diatomite FA was increased to 5 wt.% To 20 wt.%. Respectively. The chemical analysis values obtained by converting the chemical composition of the raw materials to the combined composition ratio are shown in Table 7.

[Table 6] Possible combination cost per raw material

Figure pat00006

[Table 7] Chemical Composition of Combination Base Paper

Figure pat00007

(2) Evaluation of plasticity characteristics

1) Manufacture of combined substrate plasticity specimen

 The combined powders of the four kinds of raw materials were made to have a moisture content of 8%, and were molded at a molding pressure of 150 kg / cm 2 using a 2-inch mold at 1025 ° C., 1050 ° C. and 1075 ° C., respectively. .

2) Evaluation of physical properties of fired specimen

Physical properties were evaluated using a specimen fired at 1050 ° C and 1075 ° C at a firing temperature of 1025 ° C, and the results are shown in Tables 8 to 10 and 8 (a) to 8 (c).

As the amount of clay increases (F1 → F4), a lot of shrinkage occurs and it is better to induce less plastic shrinkage by putting as few clay as possible. It can be seen that the plastic shrinkage ratio according to the firing temperature change is higher as the firing temperature is higher. However, as the diatomite content increased, the shrinkage rate decreased. Physical properties at firing at 1025 ° C in Table 8 As a result of F-1, F-2 and F-3 compositions, the plastic shrinkage, absorption and bending strength satisfy the target, while the bending strength of F-4 is below the target value . It was found that the absorption rate increased with increasing diatomite content, but the strength decreased. Physical properties at firing at 1050 ℃ in Table 3.14 satisfied the target values for F-1, F-2, F-3 and F-4. Therefore, in the case of four compositions, the firing temperature of 1050 ° C can be determined as the most suitable product production temperature. Physical properties at 1075 캜 firing in Table 10 As a result of F-2, F-3 and F-4, the plastic shrinkage, the water absorption and the bending strength satisfy the target and the F-1 water absorption rate is below the target value . This shows that the amount of diatomaceous earth is insufficient and the water absorption rate decreases as the amount of clay increases. On the other hand, the strength is the largest.

 Therefore, among the four compositions, satisfactory results are obtained at all firing temperatures of the firing temperatures of 1025 ° C., 1050 ° C. and 1075 ° C., and the F-3 composition can be determined as the most optimal composition.

[Table 8] Physical properties at firing at 1025 ° C

Figure pat00008

[Table 9] Physical properties at 1050 ° C baking

Figure pat00009

[Table 10] Physical properties at 1075 ° C baking

Figure pat00010

Table 11 shows the chromaticity according to the composition of each calcination temperature and the color change according to the composition is shown in Table 11 as chromaticity, brightness and chroma. The color of the surface is beige system, and the iron contained in the clay is a natural coloring agent. The higher the firing temperature, the darker the color is from beige to brown. Therefore, it was possible to change the color by controlling the combination ratio and the firing temperature.

[Table 11] Color change according to composition according to each firing temperature

Figure pat00011

3. Fabrication and Evaluation of Porous Ceramic Panel Prototype

(1) Establishment of prototype manufacturing condition process

The optimum composition ratio and firing temperature for the production of the porous ceramic panel are established as described above, and the process is shown in FIG.

(2) Production of prototype

1) Manufacture of substrate

 The most favorable F-3 composition in the combination test was wet-mixed and milled in a ball mill for 3 hours, and the residue was excluded to 0.5% in a 200-mesh standard, dried in a spray dryer, and then molded into a powder.

2) Mold mold design and prototype molding

As shown in Figure 3.22, a mold with a size of 150 mm × 150 mm was designed and fabricated, and 300 g of powder was weighed in the mold, and the square ceramic panel was pressed at a pressure of 150 kg / cm 2 using a press.

3) Plasticity

Using an electric furnace, a prototype was manufactured by keeping the temperature at 1025 ° C., 1050 ° C., and 1075 ° C. for 1 hour at a temperature raising rate of 5 ° C./min, as shown in the plasticity curve of FIG. 10, .

(3) Evaluation of the physical properties of the prototype

The prototype manufactured in (2) above was subjected to physical property evaluation and the results are shown in Tables 12 and 13.

In Table 12, as a result of checking the firing characteristics, the absorptivity was more than 24%, satisfying the target value of 16% or more, and the bending strength satisfied the target value of 50 kg / cm 2 at 1050 캜 and 1075 캜. That is, even though the same composition and the same firing temperature, the intensity value changes depending on the molding pressure. Therefore, the strength value is changed when the forming condition, that is, the forming pressure, is changed even under the optimum process conditions of the composition and the firing temperature. It is expected that a higher strength value can be expected by forming using an automatic high-pressure forming press in the field where productivity is required.

Table 13 shows the far infrared ray measurement results of F-1 and F-3 compositions at 40 占 폚. The far-infrared radiation energy and emissivity were higher in F-1 with a larger amount of clay, and the higher the amount of iron (F-1 4.6%, F-3 4.04%), the higher the far-infrared emissivity.

[Table 12] Evaluation results of physical properties of prototype using temperature of F-3

Figure pat00012

[Table 13] Far infrared ray measurement results of compositions F-1 and F-3 at 40 ° C

Figure pat00013

Claims (8)

i) 30 to 60 parts by weight of clay;
ii) 35 to 45 parts by weight of stone powder sludge; And
iii) 5 to 20 parts by weight of a pore-forming agent. The method according to claim 1,
The clay is SiO 2 55 ~ 65% by weight; 15 to 25 wt% of Al 2 O 3 ; 1 to 5% by weight of Na 2 O; 0.1 to 1% by weight of K 2 O; 0.1 to 1% by weight of CaO; 0.1 to 1% by weight of MgO; 1 to 3% by weight of Fe 2 O 3 ; And 0.1 to 0.5% by weight of Ti 2 O 2, based on the total weight of the porous ceramic panel. The method according to claim 1,
The abrasive contained in the abrasive sludge has the same mineral composition as the granodiorite, 65 to 75% by weight of SiO 2 ; 10 to 20% by weight of Al 2 O 3 ; 1 to 5% by weight of Na 2 O; 1 to 5% by weight of K 2 O; 1 to 3% by weight of CaO; 0.1 to 1% by weight of MgO; 1 to 3% by weight of Fe 2 O 3 ; And 0.1 to 1% by weight of Ti 2 O 2, based on the total weight of the porous ceramic panel. The method according to claim 1,
The pore former may be selected from the group consisting of diatomaceous earth, polyacrylonitrile, poly (methyl methacrylate), glass hollow microsphere, hollow fly-ash, HAp (hydroxyapatite) hollow body, carbon black, starch, Wherein the porous ceramic panel has at least one member selected from the group consisting of polystyrene, polystyrene, and polystyrene. The method according to claim 1,
Wherein the porous ceramic panel further comprises a glass frit. The method according to claim 1,
Wherein the porous ceramic panel further comprises an antimicrobial substance. (a) i) 30 to 60 parts by weight of clay; ii) 35 to 45 parts by weight of stone powder sludge; And iii) 5 to 20 parts by weight of a pore-forming agent; obtaining a slurry for preparing a porous ceramic panel;
(b) forming a formed body at a molding pressure of 30 to 200 kg / cm 2 using the slurry for preparing a porous ceramic panel obtained in the step (a);
(c) drying the molded body obtained in the step (b); And
(d) firing the molded body dried in the step (c). A porous ceramic panel made using the substrate composition for producing a porous ceramic panel according to any one of claims 1 to 6.
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KR101529561B1 (en) * 2014-11-25 2015-06-18 유영성 Thermotherapy board panel using basalt and manufacturing method thereof
KR101546240B1 (en) * 2012-10-30 2015-08-27 (주)엘지하우시스 Antimicrobial porous ceramic tile and method of manufacturing the same

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KR101529561B1 (en) * 2014-11-25 2015-06-18 유영성 Thermotherapy board panel using basalt and manufacturing method thereof

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* Cited by examiner, † Cited by third party
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