CN113292311A - Hand-pulled blank white porcelain crack-blasting thick-glaze porcelain and preparation method thereof - Google Patents
Hand-pulled blank white porcelain crack-blasting thick-glaze porcelain and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the field of ceramic products and processing methods thereof, in particular to a hand-pulled blank white porcelain crackle thick glaze porcelain, which comprises an inner blank body, an outer blank body, a ground glaze and a surface glaze, wherein crackles are arranged on the outer blank body. The fired porcelain forms crackles on the basis of the annular grains of the hand-pulled blank, and has obvious concave-convex hand feeling and unique ornamental value; the diatomite and the zeolite in the outer green body are used for increasing the porosity of the outer green body, so that the adsorption effect of the outer green body on the inner green body pug is improved, and the bonding degree of the inner green body and the outer green body and the bonding degree of the green glaze are improved, so that the green body can not crack inwards further due to crack explosion in the subsequent firing process of the ceramic; the water on the surface of the outer blank is quickly vaporized when the outer blank is baked at high temperature in the oven, so that the main body can be kept from cracking while the surface is cracked.
Description
Technical Field
The invention relates to the field of ceramic products and processing methods thereof, in particular to a hand-pulled blank white porcelain crackle thick glaze porcelain and a preparation method thereof.
Background
The crack glaze is formed by the principle that the expansion coefficient of glaze is greater than that of a blank, the traditional crack glaze only can generate fine cracks on the glaze surface, the cracks are easy to fall off when being too large, the crack glaze is not easy to be perceived by hands in touch, and the effect is not obvious enough, so that the invention patent application of application No. CN202010899909.0 discloses an open crack thick glaze white porcelain and a manufacturing process thereof, wherein the process for forming the cracks is as follows: covering the blank with the burst layer pug, continuously rotating the blank drawing machine to form a burst blank layer on the surface of the blank, rapidly baking the blank layer by using 1100-1200 flame until longitudinal cracks are formed on the surface of the blank layer, continuously rotating the blank drawing machine to form a blank, continuously expanding the blank to enable the burst blank layer to crack along the cracks to form burst lines, and manufacturing the blank. The high-temperature flame baking at 1100-1200 ℃ is carried out outside the cracked blank layer, as local high temperature is generated on the surface of the blank by the local flame, cracks are easy to directly penetrate through the whole blank from outside to outside, the yield is low, and the blank which is not preheated directly vaporizes instantly by the local high temperature generated under the flame baking, so that the surface of the blank is easy to foam, bubbles or pits are generated, the strength of the blank is reduced, the combination degree of the blank glaze after glazing is poor, and the surface of the glaze surface has pits, which cannot meet the product requirements of ideal crack ceramics.
Disclosure of Invention
An object of the present invention is to solve at least the above problems by a hand-pulled blank white porcelain crackle thick glaze porcelain and a method for preparing the same.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the hand-pulled blank white porcelain crackle thick glaze porcelain is characterized in that: the anti-explosion glaze comprises an inner blank body, an outer blank body, a ground glaze and a surface glaze, wherein the outer blank body is provided with an explosion crack, the ground glaze is applied to the inside of the explosion crack, the surface glaze is applied to the surface of the outer blank body, and the inner blank body comprises the following raw materials in parts by weight: 30-40 parts of silica sand, 20-30 parts of nepheline orthoclase, 5-10 parts of zinc white, 40-50 parts of kaolin, 10-15 parts of bentonite and 5-10 parts of potassium feldspar.
Preferably, the raw materials of the outer blank comprise the following components in parts by weight: 20-25 parts of potash feldspar, 5-10 parts of dolomite, 15-18 parts of calcium carbonate, 8-12 parts of kaolin, 15-20 parts of diatomite and 15-22 parts of zeolite.
Preferably, the inner blank body further comprises the following components in parts by weight: 5-8 parts of copper oxalate.
Preferably, the base coat comprises the following raw materials in parts by weight: 5-8 parts of lead disilicate, 8-10 parts of lithium carbonate, 5-8 parts of flint, 10-12 parts of bentonite, 5-6 parts of aluminum hydroxide, 5-6 parts of quartz and 10-12 parts of silicon dioxide.
Preferably, the overglaze comprises the following raw materials in parts by weight: 30-40 parts of transparent glaze, 20-22 parts of calcined spodumene powder, 15-20 parts of quartz, 20-25 parts of sylvite, 5-10 parts of kaolin, 5-10 parts of calcined talc, 1-5 parts of calcium silicate and 1-5 parts of barium carbonate.
The hand-pulled blank white porcelain crackle thick glaze porcelain is characterized by comprising the following steps:
step a, forming an outer blank body by hand pulling, forming annular grains on the surface of the outer blank body in the process of rotationally pulling the blank body, and then drying;
b, uniformly spraying water on the outer blank by a spraying method, standing for 5-6 minutes to enable water to permeate into the surface layer of the blank, and then placing the outer blank in a freezer for quick freezing to enable the inner blank to be bright to form an ice layer;
step c, the outer blank body is sent into a baking furnace and baked at the temperature of 600-;
d, performing rotary grouting in the outer blank body, pouring out residual slurry and drying the inner blank body;
e, drawing a base glaze in the cracks of the outer blank;
step f, applying a cover glaze on the whole external blank;
and step g, putting the blank body subjected to the surface glaze in a kiln for firing and forming, wherein the firing temperature is 1200-1260 ℃, and the firing atmosphere is an oxidizing atmosphere, so that the hand-pulled blank white porcelain cracking thick glaze porcelain is prepared.
Preferably, the water content of the inner blank in the step a is 1.5-2%.
Preferably, in the step b, the inner blank is placed in a tray and is placed on a rotating disc together with the tray, the rotating speed of the rotating disc is 30r/min, and the spraying time is 10-15 s.
Preferably, the baking in step c is performed by microwave heating.
Preferably, in the step d, the rotating speed is increased until the slurry climbs to the bottle mouth of the outer blank, the rotating speed is maintained for 5-6min, then the rotating and standing are stopped for 20-25min, the residual slurry is poured out, and the drying is carried out at the temperature of 150-.
As can be seen from the above description, the hand-pulled blank white porcelain crackle thick glaze porcelain provided by the invention has the following beneficial effects: the fired porcelain forms crackles on the basis of the circumferential lines of the hand-pulled blank, has obvious concave-convex hand feeling and unique ornamental value, and the bottom of the white overglaze presents light green crackle ground glaze; the diatomite and the zeolite in the outer green body are used for increasing the porosity of the outer green body, so that the adsorption effect of the outer green body on the inner green body pug is improved, and the bonding degree of the inner green body and the outer green body and the bonding degree of the green glaze are improved, so that the green body can not crack inwards further due to crack explosion in the subsequent firing process of the ceramic; the inner surface and the outer surface of the outer blank body form a water content gradient difference, and an ice layer on the surface of the outer blank body and water in the surface are quickly vaporized when the outer blank body is baked at high temperature in an oven, so that the main body can be kept from cracking while the surface forms cracks; according to the invention, after the inner green body forms the crack, the inner green body is injected and adsorbed to form a layer of inner green body, so that the overall strength of the green body is improved.
Detailed Description
The invention is further described below by means of specific embodiments.
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The hand-pulled blank white porcelain crack-blasting thick-glazed porcelain comprises an inner blank body, an outer blank body, a ground glaze and a surface glaze, wherein the outer blank body is provided with crack-blasting cracks, the ground glaze is applied to the inside of the crack-blasting cracks, the surface glaze is applied to the surface of the outer blank body, and the inner blank body comprises the following raw materials in parts by weight: 30-40 parts of silica sand, 20-30 parts of nepheline orthoclase, 5-10 parts of zinc white, 40-50 parts of kaolin, 10-15 parts of bentonite and 5-10 parts of potassium feldspar.
The outer blank comprises the following raw materials in parts by weight: 20-25 parts of potash feldspar, 5-10 parts of dolomite, 15-18 parts of calcium carbonate, 8-12 parts of kaolin, 15-20 parts of diatomite, 15-22 parts of zeolite, and the diatomite and the zeolite in the outer blank body are used for increasing the porosity of the outer blank body, so that the adsorption effect of the outer blank body on the mud of the inner blank body is improved, the combination degree of the inner blank body and the outer blank body and the combination degree of the blank glaze are improved, and the blank body cannot crack inwards further due to cracking in the subsequent firing process of the ceramic.
The inner blank body comprises the following raw materials in parts by weight: 5-8 parts of copper oxalate.
The ground glaze comprises the following raw materials in parts by weight: 5-8 parts of lead disilicate, 8-10 parts of lithium carbonate, 5-8 parts of flint, 10-12 parts of bentonite, 5-6 parts of aluminum hydroxide, 5-6 parts of quartz and 10-12 parts of silicon dioxide. In the firing process of the porcelain, in an oxidizing atmosphere, because the thickness of the crack explosion part of the outer blank body is thinner, copper ions contained in the inner blank body volatilize and permeate into the crack explosion through the inner blank body with high porosity and are mixed with lead oxide in the ground coat to be green, and the oxide mixture continuously permeates into the overglaze in the firing process, so that the crack explosion of the hand-pulled blank white porcelain crack explosion porcelain presents a light green ground color, and the porcelain has a unique ornamental value.
The overglaze comprises the following raw materials in parts by weight: 30-40 parts of transparent glaze, 20-22 parts of calcined spodumene powder, 15-20 parts of quartz, 20-25 parts of sylvite, 5-10 parts of kaolin, 5-10 parts of calcined talc, 1-5 parts of calcium silicate and 1-5 parts of barium carbonate. The thickness of the glaze surface is 0.3-0.4 mm.
The hand-pulled blank white porcelain crackle thick glaze porcelain is characterized by comprising the following steps:
step a, forming an outer blank body by hand pulling, forming annular grains on the surface of the outer blank body in the process of rotationally pulling the blank body, and then drying;
b, uniformly spraying water on the outer blank by a spraying method, standing for 5-6 minutes to enable water to permeate into the surface layer of the blank, and then placing the outer blank in a freezer for quick freezing to enable the inner blank to be bright to form an ice layer; the outer blank body is quick-frozen before being baked, the temperature difference before and after baking can be improved, the temperature required by baking of the outer blank body outside the rear surface is reduced, through-type broken lines caused by high temperature exceeding thousand degrees during baking are avoided, the whole water content of the outer blank body is lower than 2%, the inner side of the outer blank body is not easy to crack due to low water content, the water content of the surface of the outer blank body is 3.5-4% due to water permeation, an ice layer is formed on the surface of the outer blank body, the gradient difference of the water content is formed on the inner surface and the outer surface of the outer blank body, the ice layer on the surface of the outer blank body and the water in the surface are quickly vaporized during high-temperature baking, and the main body can be kept not to crack while cracks are formed on the surface.
Step c, the outer blank body is sent into a baking furnace and baked at the temperature of 600-;
d, performing rotary grouting in the outer blank body, pouring out residual slurry and drying the inner blank body; in the existing process of pulling a young blank and then covering a layer of burst layer, because the young blank and the burst layer are integrally baked by high-temperature flame, the local high temperature easily causes cracks to penetrate through the young blank and the burst layer, so the finished product rate is low; according to the invention, after the inner green body forms the crack, the inner green body is injected and adsorbed to form a layer of inner green body, so that the overall strength of the green body is improved, and meanwhile, the green body main body cannot crack inwards further due to crack explosion in the subsequent firing process of the ceramic.
E, drawing a base glaze in the cracks of the outer blank;
step f, applying a cover glaze on the whole external blank;
and step g, putting the blank body subjected to the surface glaze in a kiln for firing and forming, wherein the firing temperature is 1200-1260 ℃, and the firing atmosphere is an oxidizing atmosphere, so that the hand-pulled blank white porcelain cracking thick glaze porcelain is prepared. The fired porcelain forms crackles on the basis of the annular grains of the hand-pulled blank, the bottom of the white overglaze presents light green crackle underglaze, and the porcelain has obvious concave-convex hand feeling and unique ornamental value.
And c, the water content of the inner blank in the step a is 1.5-2%.
In the step b, the inner blank is placed in the tray and is placed on the rotary table together with the tray, the rotating speed of the rotary table is 30r/min, and the spraying time is 10-15 s.
And c, baking by using microwave heating. The wave heating can uniformly heat the whole external blank body, so that the explosive cracks are uniformly distributed.
And d, increasing the rotating speed until the slurry climbs to the bottle mouth of the outer blank, maintaining the rotating speed for 5-6min, stopping rotating and standing for 20-25min, pouring out the residual slurry, and drying at the temperature of 150-. The diatomite and the zeolite are used for increasing the porosity of the outer green body, so that the adsorption effect of the outer green body on the inner green body pug is improved, and the combination degree of the inner green body and the outer green body and the combination degree of the green glaze are improved, so that the green body main body can not crack to the inner side due to crack explosion in the subsequent firing process of the ceramic.
The above description is only a few specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by the design concept should fall within the scope of the present invention.
Claims (10)
1. The hand-pulled blank white porcelain crackle thick glaze porcelain is characterized in that: the anti-explosion glaze comprises an inner blank body, an outer blank body, a ground glaze and a surface glaze, wherein the outer blank body is provided with an explosion crack, the ground glaze is applied to the inside of the explosion crack, the surface glaze is applied to the surface of the outer blank body, and the inner blank body comprises the following raw materials in parts by weight: 30-40 parts of silica sand, 20-30 parts of nepheline orthoclase, 5-10 parts of zinc white, 40-50 parts of kaolin, 10-15 parts of bentonite and 5-10 parts of potassium feldspar.
2. The hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 1, wherein: the outer blank comprises the following raw materials in parts by weight: 20-25 parts of potash feldspar, 5-10 parts of dolomite, 15-18 parts of calcium carbonate, 8-12 parts of kaolin, 15-20 parts of diatomite and 15-22 parts of zeolite.
3. The hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 1, wherein: the inner blank body comprises the following raw materials in parts by weight: 5-8 parts of copper oxalate.
4. The hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 1, wherein: the ground glaze comprises the following raw materials in parts by weight: 5-8 parts of lead disilicate, 8-10 parts of lithium carbonate, 5-8 parts of flint, 10-12 parts of bentonite, 5-6 parts of aluminum hydroxide, 5-6 parts of quartz and 10-12 parts of silicon dioxide.
5. The hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 1, wherein: the overglaze comprises the following raw materials in parts by weight: 30-40 parts of transparent glaze, 20-22 parts of calcined spodumene powder, 15-20 parts of quartz, 20-25 parts of sylvite, 5-10 parts of kaolin, 5-10 parts of calcined talc, 1-5 parts of calcium silicate and 1-5 parts of barium carbonate.
6. The method for preparing the hand-pulled blank white crackle thick glaze porcelain according to any one of claims 1-5, which is characterized by comprising the following steps:
step a, forming an outer blank body by hand pulling, forming annular grains on the surface of the outer blank body in the process of rotationally pulling the blank body, and then drying;
b, uniformly spraying water on the outer blank by a spraying method, standing for 5-6 minutes to enable water to permeate into the surface layer of the blank, and then placing the outer blank in a freezer for quick freezing to enable the inner blank to be bright to form an ice layer;
step c, the outer blank body is sent into a baking furnace and baked at the temperature of 600-;
d, performing rotary grouting in the outer blank body, pouring out residual slurry and drying the inner blank body;
e, drawing a base glaze in the cracks of the outer blank;
step f, applying a cover glaze on the whole external blank;
and step g, putting the blank body subjected to the surface glaze in a kiln for firing and forming, wherein the firing temperature is 1200-1260 ℃, and the firing atmosphere is an oxidizing atmosphere, so that the hand-pulled blank white porcelain cracking thick glaze porcelain is prepared.
7. The method for preparing the hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 6, which is characterized in that: and c, the water content of the inner blank in the step a is 1.5-2%.
8. The method for preparing the hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 6, which is characterized in that: in the step b, the inner blank is placed in the tray and is placed on the rotary table together with the tray, the rotating speed of the rotary table is 30r/min, and the spraying time is 10-15 s.
9. The method for preparing the hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 6, which is characterized in that: and c, baking by using microwave heating.
10. The method for preparing the hand-pulled blank white porcelain crackle thick glaze porcelain according to claim 6, which is characterized in that: and d, increasing the rotating speed until the slurry climbs to the bottle mouth of the outer blank, maintaining the rotating speed for 5-6min, stopping rotating and standing for 20-25min, pouring out the residual slurry, and drying at the temperature of 150-.
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