Single-fired partially-glazed relief ceramic article and method of making same

Abstract

The present application relates to the field of ceramic and its preparation method, in particular to a kind of once-fired local glaze relief ceramic product and its preparation method, the surface of body is provided with recessed groove, recessed groove is filled with foamed cosmetic clay and crystal glaze from bottom to top in sequence, crystal glaze protrudes from the surface of body and forms crystal relief, body and crystal glaze are covered with ground glaze, face glaze and invisible pattern drawn by invisible glaze from bottom to top in sequence.In the glaze firing process, foamed cosmetic clay releases a large amount of gas, drives crystal glaze to move towards the surface of body and protrude from glaze surface, crystal glaze contains a large amount of high-melting-point calcined clinker, its fluidity is smaller than that of ground glaze and face glaze, so the surface of ground glaze and face glaze becomes thinner during the protruding process of crystal glaze, so that the color of crystal glaze is more prominent;Crystal relief and invisible pattern on the glaze surface have micro convex feeling and can only be observed by side view, respectively, and the whole has unique artistic beauty.

Description

Technical Field

[0001] The invention relates to the field of ceramics and preparation methods thereof, in particular to a one-time fired partial glaze relief ceramic product and a preparation method thereof. Background Art

[0002] Traditional relief glazes include overglaze and underglaze. Overglaze relief is achieved by first applying color to the pottery's surface before embossing. Overglaze reliefs are characterized by vibrant colors, crystal clearness, and a rich three-dimensional effect. This decorative technique developed significantly during the Ming and Qing dynasties and remains a traditional ceramic decorative technique. Underglaze relief involves first applying color to the base, then embossing the decorative pattern onto the vessel. This process is then glazed and fired. Its characteristics include clear images, soft colors, and a lustrous finish. Underglaze pottery has a long history of decorative decoration, and underglaze techniques, exemplified by cloisonné, are a representative example of traditional Chinese crafts. The main difference between overglaze and underglaze lies in the placement and sequence of the glaze layers. Overglaze relief involves applying color first and then embossing, while underglaze relief involves embossing first and then glazing. Compared to underglaze enamel, overglaze enamel features richer, more three-dimensional patterns, and a translucent, luminous quality. Underglaze enamel reliefs, on the other hand, are known for their cool, delicate, and precise lines, soft colors, and lustrous finish. However, both traditional overglaze and underglaze enamel reliefs employ a stacking technique, protruding prominently from the glaze surface. This resulted in a seemingly overly contrived and overtly pronounced relief after firing, leading to the creation of this project. Summary of the Invention

[0003] An object of the present invention is to solve at least the above-mentioned problems by a single-fired partial glaze relief ceramic product and a method for preparing the same.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a partially glazed relief ceramic product fired once, including a green body, the surface of the green body is provided with groove patterns, the groove patterns are filled with foamed makeup soil and crystal glaze from bottom to top, the crystal glaze protrudes from the surface of the green body to form a crystal relief, the green body and crystal glaze are covered with base glaze, surface glaze and invisible patterns drawn by invisible glaze from bottom to top.

[0005] Preferably, the raw materials of the foaming cosmetic soil include the following components in parts by weight: 50-60 parts of clay, 10-12 parts of quartz sand, 12-15 parts of gypsum, 10-14 parts of waste ceramics, 4-5 parts of fly ash, 5-6 parts of calcium carbonate, and 5-6 parts of sodium phosphate dodecahydrate.

[0006] Preferably, the raw materials of the crystal glaze include the following components in parts by weight: 50-60 parts of calcined clinker, 10-12 parts of feldspar, 3-4 parts of colorant, and 3-4 parts of sodium carboxymethyl cellulose glue; the raw materials of the calcined clinker include the following components in parts by weight: 30-40 parts of quartz sand, 15-16 parts of potassium feldspar, 10-12 parts of spodumene, 6-8 parts of calcium carbonate, 4-6 parts of talc, 2-3 parts of boric acid, 2-3 parts of borax, 1-2 parts of potassium nitrate, and 1-2 parts of barium carbonate; the raw materials of the colorant include the following components in parts by weight: 10-12 parts of cobalt carbonate and 6-8 parts of light rutile.

[0007] Preferably, the raw materials of the base glaze include the following components in parts by weight: 30-35 parts of nepheline orthoclase, 15-18 parts of quartz, 10-12 parts of borate, 5-7 parts of soda ash, 15-20 parts of calcium carbonate, 2-3 parts of zinc oxide, 5-6 parts of ball clay, 3-4 parts of copper carbonate, and 2-3 parts of bentonite.

[0008] Preferably, the raw materials of the glaze include the following components in parts by weight: 20-25 parts of quartz, 20-25 parts of kaolin, 30-35 parts of potassium feldspar, 10-15 parts of talc, and 10-15 parts of chalk.

[0009] Preferably, the raw materials of the invisible glaze include the following components in parts by weight: 80-90 parts of basic glaze, 10-12 parts of ethylene glycol, 8-10 parts of sodium carboxymethyl cellulose glue, 10-12 parts of glycerin, 5-8 parts of vegetable oil, 10-12 parts of water, 5-6 parts of zinc oxide, 2-3 parts of strontium carbonate, 2-3 parts of zirconium silicate, and 2-3 parts of tin oxide; the raw materials of the basic glaze include the following components in parts by weight: 30-35 parts of nepheline orthoclase, 18-20 parts of quartz, 8-12 parts of borate, 6-8 parts of ball clay, 10-12 parts of kaolin, 10-12 parts of soda ash, and 5-8 parts of spodumene.

[0010] The method for preparing the above-mentioned single-fired partial glaze relief ceramic product comprises the following steps:

[0011] Step a, forming and drying the green body;

[0012] Step b, carving grooves on the outer surface of the blank;

[0013] Step c: placing the green body into a kiln for biscuit firing;

[0014] Step d, filling the grooves of the body with foaming clay and drying, and then filling with crystal glaze and drying;

[0015] Step e: applying a base glaze on the surface of the green body and drying it;

[0016] Step f, applying top glaze on the base glaze and drying;

[0017] Step g, drawing invisible patterns on the top glaze with invisible glaze and drying;

[0018] Step f: placing the ceramic into a kiln for glaze firing to obtain a ceramic product.

[0019] Preferably, in the step d, the foaming makeup soil is dipped into the brush and filled into the grooves and lines, and after drying, the excess foaming soil is scraped off with a carving knife, and then the crystal glaze is dipped into the brush and filled into the grooves and lines.

[0020] Preferably, in step b, the groove pattern depth is 2-3 mm, the carving knife includes a T-shaped limiting blade located at the end, the T-shaped limiting blade includes a blade portion and a limiting portion, and the depth of the blade portion is 1-1.5 mm.

[0021] Preferably, the calcined clinker in the crystal glaze is prepared by the following method: preparing raw materials, uniformly mixing, melting and firing at 1300-1350 degrees Celsius, water quenching, drying, crushing, and sieving through 100-120 meshes to obtain the calcined clinker;

[0022] In the step f, a layer of decal paper is covered on the blank, the decal paper is engraved with hollow lines for forming invisible patterns, invisible glaze is applied on the surface of the decal paper, then the decal paper is peeled off, the invisible pattern is printed on the base glaze, and finally dried to set the shape.

[0023] From the above description, it can be seen that the one-time fired partial glaze relief ceramic product and the preparation method thereof provided by the present invention have the following beneficial effects: the groove pattern is filled with foaming makeup soil and crystal glaze in sequence from bottom to top. During the glaze firing process, the foaming makeup soil releases a large amount of gas, thereby causing the foaming soil to expand. After firing, a substance with a void structure is formed, which drives the crystal glaze to move toward the surface of the body and protrude from the glaze surface. The crystal glaze contains a large amount of high-melting point calcined clinker, and its fluidity is lower than that of the bottom glaze and the top glaze. Therefore, during the protrusion of the crystal glaze, the bottom glaze and the top glaze on its surface become thinner, making the color of the crystal glaze more prominent; when observed from the front, the invisible pattern formed by the invisible glaze is integrated with the bottom glaze and the top glaze, and the invisible pattern is not obvious and not easy to be observed. When observed from the side, due to the difference in refractive index, the existence of the invisible pattern can be observed, so that the glaze surface has the effect of invisible relief; the glaze surface has both a partial crystal glaze relief with a slightly convex texture and a partial invisible pattern that can only be observed when viewed from the side, and the overall artistic beauty is unique. DETAILED DESCRIPTION

[0024] The present invention is further described below through specific embodiments.

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] The present invention presents a single-fired, partially glazed relief ceramic product comprising a body with grooves formed on its surface. The grooves are sequentially filled with foamed makeup clay and crystal glaze from bottom to top, with the crystal glaze protruding from the body surface to form a crystal relief. The body and crystal glaze are sequentially covered with a base glaze, a top glaze, and an invisible pattern drawn with invisible glaze from bottom to top. The glaze surface features both a slightly convex crystal relief and an invisible pattern visible only from the side, creating a unique artistic aesthetic.

[0027] The raw materials of the foaming cosmetic soil include the following components in parts by weight: 50-60 parts of clay, 10-12 parts of quartz sand, 12-15 parts of gypsum, 10-14 parts of waste ceramics, 4-5 parts of fly ash, 5-6 parts of calcium carbonate, and 5-6 parts of sodium phosphate dodecahydrate. The basic materials of the foaming clay are inorganic non-metallic materials such as clay, quartz sand, gypsum, and fly ash. Calcium carbonate serves as a foaming agent. During the glaze firing process, a large amount of gas is released, thereby causing the foamed clay to expand, forming a material with a void structure after firing. Since the groove pattern limits the expansion direction of the foamed clay, the foamed clay drives the crystal glaze to move toward the surface of the body and protrude from the glaze surface during the expansion process. The crystal glaze contains a large amount of high-melting-point calcined clinker, and its fluidity is lower than that of the bottom glaze and the top glaze. Therefore, during the protrusion of the crystal glaze, the bottom glaze and the top glaze on its surface become thinner, making the color of the crystal glaze more prominent. The foaming agent can be an inorganic material or an organic material. Since the foaming agent of the organic material has a low foaming capacity but releases harmful gases, the present invention preferably uses an inorganic foaming agent such as calcium carbonate, which has a lower foaming capacity than the organic foaming agent. Therefore, sodium phosphate dodecahydrate is used as a foam stabilizer to extend the foaming stability period, thereby ensuring the formation of the void structure of the foamed clay.

[0028] The raw materials of the crystal glaze include the following components in parts by weight: 50-60 parts of calcined clinker, 10-12 parts of feldspar, 3-4 parts of colorant, and 3-4 parts of sodium carboxymethyl cellulose glue; the raw materials of the calcined clinker include the following components in parts by weight: 30-40 parts of quartz sand, 15-16 parts of potassium feldspar, 10-12 parts of spodumene, 6-8 parts of calcium carbonate, 4-6 parts of talc, 2-3 parts of boric acid, 2-3 parts of borax, 1-2 parts of potassium nitrate, and 1-2 parts of barium carbonate; the raw materials of the colorant include the following components in parts by weight: 10-12 parts of cobalt carbonate and 6-8 parts of light rutile. The crystal glaze with cobalt carbonate and light rutile as colorants presents a crystal dark green color after firing. The crystal glaze contains a large amount of calcined clinker, so its melting point is high and its fluidity is weaker than the base glaze and the surface glaze. When the glaze is fired, the base glaze and the surface glaze on the surface of the crystal glaze become thinner due to flow, thereby highlighting the color of the crystal glaze. Due to the limited thickness of the foaming makeup soil, the extent to which it causes the crystal glaze to float is limited, which is ultimately reflected in the glaze effect. The crystal relief protrudes slightly from the glaze surface, and there is a slight relief touch when touching the glaze surface with your hand. It is not as prominent and deliberate as the relief decoration on the traditional relief glaze.

[0029] The base glaze's raw materials, measured by weight, include the following: 30-35 parts nepheline orthoclase, 15-18 parts quartz, 10-12 parts borate, 5-7 parts soda ash, 15-20 parts calcium carbonate, 2-3 parts zinc oxide, 5-6 parts ball clay, 3-4 parts copper carbonate, and 2-3 parts bentonite. After firing, the base glaze exhibits a light bluish-green hue, serving as the base color for the entire glaze, a lighter shade than the dark green of the crystal glaze.

[0030] The raw materials of the top glaze include the following components in parts by weight: 20-25 parts of quartz, 20-25 parts of kaolin, 30-35 parts of potassium feldspar, 10-15 parts of talc, and 10-15 parts of chalk. The top glaze becomes a transparent glaze after firing.

[0031] The raw materials of the invisible glaze include the following components in parts by weight: 80-90 parts of basic glaze, 10-12 parts of ethylene glycol, 8-10 parts of sodium carboxymethyl cellulose glue, 10-12 parts of glycerin, 5-8 parts of vegetable oil, 10-12 parts of water, 5-6 parts of zinc oxide, 2-3 parts of strontium carbonate, 2-3 parts of zirconium silicate, and 2-3 parts of tin oxide; the raw materials of the basic glaze include the following components in parts by weight: 30-35 parts of nepheline orthoclase, 18-20 parts of quartz, 8-12 parts of borate, 6-8 parts of ball clay, 10-12 parts of kaolin, 10-12 parts of soda ash, and 5-8 parts of spodumene. After firing, invisible glaze becomes a highly transparent glaze. The printing thickness of invisible glaze is small and it has a high melting ability at high temperature, so it can be melted into the surface glaze. When observed from the front, the invisible pattern formed by the invisible glaze is integrated with the base glaze and the surface glaze. The invisible pattern is not obvious and not easy to be observed. The glossiness of invisible glaze is higher than that of surface glaze, and the invisible relief effect is caused by light reflection and refraction. The surface glaze mainly undergoes reflection. Since invisible glaze has a stronger refractive index than the surface glaze, under the observation of oblique incident light, the oblique light enters the invisible glaze and undergoes secondary refraction at the interface. The secondary refraction is parallel to the primary refracted light, thereby increasing its radiation intensity. The invisible glaze protrudes from the base glaze and the surface glaze and is observed by the human eye. Therefore, when observed from the side, due to the difference in refractive index, the existence of the invisible pattern can be observed, giving the glaze surface an invisible relief effect.

[0032] A method for preparing a partially glazed relief ceramic product fired once comprises the following steps:

[0033] Step a, forming and drying the green body;

[0034] Step b, carving grooves on the outer surface of the blank;

[0035] Step c: placing the green body into a kiln for biscuit firing;

[0036] Step d, filling the grooves of the body with foaming clay and drying, and then filling with crystal glaze and drying;

[0037] Step e: applying a base glaze on the surface of the green body and drying it;

[0038] Step f, applying top glaze on the base glaze and drying;

[0039] Step g, drawing invisible patterns on the top glaze with invisible glaze and drying;

[0040] Step f: placing the ceramic into a kiln for glaze firing to obtain a ceramic product.

[0041] In step d, use a brush to dip in foaming makeup soil and fill it into the grooves. After drying, use a carving knife to slowly scrape off the excess foaming soil so that the foaming soil retains a certain thickness. Then use a brush to dip in crystal glaze and fill it into the grooves. After the crystal glaze is dried, use fine sandpaper to gently polish the crystal glaze so that the crystal glaze is flush with the surface of the blank.

[0042] In step b, the groove depth is 2-3 mm. The carving knife includes a T-shaped limiting blade at the end. The T-shaped limiting blade includes a blade portion and a limiting portion. The blade portion has a depth of 1-1.5 mm. The blade portion and the limiting portion form a T-shape. The T-shaped limiting blade is used to scrape away excess foamed soil in the grooves filled with foamed makeup soil. When the carving knife is working, the blade portion extends into the grooves, and the limiting portion abuts the surface of the blank to limit the depth of the blade portion extending into the grooves. Ultimately, the thickness of the foamed soil retained in the grooves is less than 1.5 mm. The crystal glaze is then filled into the remaining grooves.

[0043] The preparation method of the calcined clinker in the crystal glaze is as follows: the calcined clinker is obtained through raw material batching, uniform mixing, melting and firing at 1300-1350 degrees Celsius, water quenching, drying, crushing, and 100-120 mesh screening; the clinker obtained by high-temperature calcination has high transparency and high melting point, which makes the crystal glaze not highly integrated with the base glaze and the surface glaze. When the glaze is fired at high temperature, the base glaze and the surface glaze flow faster than the crystal glaze, causing the glaze surface to become thinner, thereby highlighting the relief formed by the crystal glaze.

[0044] In step f, the base is covered with a layer of decal paper, which is engraved with hollowed-out patterns for forming invisible patterns. Invisible glaze is then applied to the decal paper. The decal paper is then removed, and the invisible pattern is printed on the base glaze. Finally, the base glaze is dried to set the pattern. The invisible glaze is then partially printed using a printing screen. During firing, the invisible glaze blends into the top glaze, forming the invisible pattern.

[0045] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A ceramic product with partial glaze relief, fired once, characterized by: The invention comprises a body, wherein the surface of the body is provided with grooves, wherein the grooves are filled with foaming makeup soil and crystal glaze in sequence from bottom to top, wherein the crystal glaze protrudes from the surface of the body to form a crystal relief, and wherein the body and the crystal glaze are covered with a base glaze, a top glaze and an invisible pattern drawn with invisible glaze in sequence from bottom to top; The raw materials of the foaming makeup soil include the following components in parts by weight: 50-60 parts of clay, 10-12 parts of quartz sand, 12-15 parts of gypsum, 10-14 parts of waste ceramics, 4-5 parts of fly ash, 5-6 parts of calcium carbonate, and 5-6 parts of sodium phosphate dodecahydrate; The raw materials of the crystal glaze include the following components in parts by weight: 50-60 parts of calcined clinker, 10-12 parts of feldspar, 3-4 parts of colorant, and 3-4 parts of sodium carboxymethyl cellulose glue; The raw materials of the calcined clinker include the following components in parts by weight: 30-40 parts of quartz sand, 15-16 parts of potassium feldspar, 10-12 parts of spodumene, 6-8 parts of calcium carbonate, 4-6 parts of talc, 2-3 parts of boric acid, 2-3 parts of borax, 1-2 parts of potassium nitrate, and 1-2 parts of barium carbonate; The raw materials of the invisible glaze include the following components in parts by weight: 80-90 parts of base glaze, 10-12 parts of ethylene glycol, 8-10 parts of sodium carboxymethyl cellulose glue, 10-12 parts of glycerin, 5-8 parts of vegetable oil, 10-12 parts of water, 5-6 parts of zinc oxide, 2-3 parts of strontium carbonate, 2-3 parts of zirconium silicate, and 2-3 parts of tin oxide; The raw materials of the basic glaze include the following components in parts by weight: 30-35 parts of nepheline orthoclase, 18-20 parts of quartz, 8-12 parts of borate, 6-8 parts of ball clay, 10-12 parts of kaolin, 10-12 parts of soda ash, and 5-8 parts of spodumene.

2. The single-fired partial glaze relief ceramic product according to claim 1, characterized in that: The raw materials of the colorant include the following components in parts by weight: 10-12 parts of cobalt carbonate and 6-8 parts of light rutile.

3. The ceramic product with partial glaze relief fired once according to claim 1, characterized in that: The raw materials of the base glaze include the following components in parts by weight: 30-35 parts of nepheline orthoclase, 15-18 parts of quartz, 10-12 parts of borate, 5-7 parts of soda ash, 15-20 parts of calcium carbonate, 2-3 parts of zinc oxide, 5-6 parts of ball clay, 3-4 parts of copper carbonate, and 2-3 parts of bentonite.

4. The ceramic product with partial glaze relief fired once according to claim 1, characterized in that: The raw materials of the glaze include the following components in parts by weight: 20-25 parts of quartz, 20-25 parts of kaolin, 30-35 parts of potassium feldspar, 10-15 parts of talc, and 10-15 parts of chalk.

5. The method for preparing a single-fired partial glaze relief ceramic product according to any one of claims 1 to 4, characterized in that: The steps include: Step a, forming and drying the green body; Step b, carving grooves on the outer surface of the blank; Step c: placing the green body into a kiln for biscuit firing; Step d, filling the grooves of the body with foaming clay and drying, and then filling with crystal glaze and drying; Step e: applying a base glaze on the surface of the green body and drying it; Step f, applying top glaze on the base glaze and drying; Step g, drawing invisible patterns on the top glaze with invisible glaze and drying; Step h: putting the glaze into the kiln for firing to obtain a ceramic product.

6. The method for preparing a single-fired partial glaze relief ceramic product according to claim 5, characterized in that: In the step d, the foaming makeup soil is dipped into the brush and filled into the grooves and lines, and after drying, the excess foaming makeup soil is scraped off with a carving knife, and then the crystal glaze is dipped into the brush and filled into the grooves and lines.

7. The method for preparing a single-fired partial glaze relief ceramic product according to claim 6, characterized in that: The groove pattern depth is 2-3mm; the carving knife includes a T-shaped limiting blade located at the end, the T-shaped limiting blade includes a blade portion and a limiting portion, and the depth of the blade portion is 1-1.5mm.

8. The method for preparing a single-fired partial glaze relief ceramic product according to claim 5, characterized in that: The preparation method of the calcined clinker in the crystal glaze is as follows: the calcined clinker is obtained by batching raw materials, uniformly mixing, melting and firing at 1300-1350 degrees Celsius, water quenching, drying, crushing, and screening through 100-120 meshes; In step g, a layer of decal paper is covered on the blank, the decal paper is engraved with hollow lines for forming invisible patterns, invisible glaze is applied on the surface of the decal paper, then the decal paper is peeled off, the invisible pattern is printed on the base glaze, and finally dried to set the shape.