Rust fancy glaze based on purple soil and preparation method thereof

Abstract

The invention discloses purple soil-based rust fancy glaze and a preparation method thereof, and relates to the technical field of ceramic manufacturing. The method has the advantages of raw materials, the natural purple soil is used as the main raw material, the raw materials are wide in source and low in cost, dependence on traditional chemical raw materials is reduced, and good economical efficiency and environmental friendliness are achieved; the glaze surface is unique, a product with a unique caramel blue glaze surface effect can be fired through a specific process and formula, the glaze surface is unique in color and excellent in texture, has high artistic value and ornamental value and can be applied to multiple fields such as decoration and handicrafts, and the market competitiveness of the product is improved; the process is simple, the preparation process is relatively simple to operate, easy to control and implement and suitable for industrial production, the production efficiency can be effectively improved, and the production cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of ceramic manufacturing technology, specifically to a method for preparing rust-colored glazed products based on purple clay. Background Technology

[0002] Rust-patterned glaze, with its unique rust-like texture, stands out in the field of ceramic decoration. Its mottled texture and natural color variations possess significant artistic value. However, the preparation of traditional rust-patterned glaze faces two major technical bottlenecks: First, its formula relies on conventional minerals, but the key minerals are not only limited in origin but also relatively expensive, making it uneconomical; second, the process requires very strict control over the firing temperature of 1200-1300℃ and the oxidation-reduction parameters within the kiln, as even slight fluctuations can easily cause glaze defects, thus increasing production difficulty and cost.

[0003] Currently, finding natural, environmentally friendly raw materials and preparation processes that can achieve unique artistic effects has become a key research focus in the industry. Purple clay, a widely available natural resource, is rich in silicate minerals and natural iron oxides, meeting the requirements of rust-patterned glazes. However, purple clay is rarely used in the preparation of glazed products, and mature technologies for transforming it into glazed products with unique appearances have not yet been developed.

[0004] Therefore, there is an urgent need to propose new solutions to the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a rust-colored glaze based on purple clay and its preparation method. By utilizing natural purple clay and through specific processes and formulas, production costs are reduced and dependence on specific mineral raw materials is decreased. At the same time, a new approach to ceramic product preparation is provided to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing rust-colored glaze based on purple clay, comprising at least the following steps:

[0007] S1: Process raw materials and select suitable raw materials for preparation;

[0008] S2: The glaze slurry is prepared by mixing the raw material additives selected in S1 with water.

[0009] S3: Apply the glaze slurry obtained from S2 to the surface of the body, dry it, and then fire it in a kiln. After firing, the porcelain body with iron rust glaze decoration is obtained.

[0010] Furthermore, S1 includes at least the following steps:

[0011] Purple soil was selected as the base material and crushed into powder.

[0012] Then, the powder is screened using a sieve, and purple soil powder with a particle size of 100 mesh is selected for later use.

[0013] Furthermore, S2 includes at least the following steps:

[0014] Add potassium carbonate, calcium carbonate and water to the 100-mesh purple soil powder obtained by screening;

[0015] The amount of potassium carbonate added is 5% to 10% of the mass of purple soil powder, the amount of calcium carbonate added is 8% to 12% of the mass of purple soil powder, and the amount of water added is 80% to 120% of the mass of purple soil powder.

[0016] The purple clay powder is thoroughly mixed with potassium carbonate, calcium carbonate, and water to obtain a glaze slurry.

[0017] Furthermore, the firing conditions in S3 are as follows:

[0018] Firing in an oxidizing atmosphere, the temperature is increased from room temperature to 500℃ at a rate of 3℃ / min, and held at 500℃ for 60min;

[0019] Then, the temperature was increased from 500°C to 580°C at a rate of 3°C / min, and held at 580°C for 50 minutes.

[0020] Then, the temperature was increased from 500℃ to 1300℃ at a rate of 2℃ / min, and held at 1300℃ for 1 hour.

[0021] Finally, cool to room temperature.

[0022] The rust-colored glaze based on purple clay was prepared using the aforementioned method for preparing rust-colored glaze based on purple clay.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This invention has the advantage of raw materials, using natural purple soil as the main raw material. The raw materials are widely available and inexpensive, reducing the dependence on traditional chemical raw materials and having good economic and environmental benefits.

[0025] 2. The glaze of this invention is unique. Through specific processes and formulas, it is possible to fire a rust-colored glaze with a unique brownish-blue glaze effect. This glaze has a unique color and excellent texture, and has high artistic and ornamental value. It can be applied to multiple fields such as decoration and handicrafts, thereby enhancing the market competitiveness of the product.

[0026] 3. The process of the present invention is simple, the preparation process is relatively simple to operate, easy to control and implement, suitable for industrial production, and can effectively improve production efficiency and reduce production costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the preparation in Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the preparation in Embodiment 2 of the present invention;

[0030] Figure 3 This is a schematic diagram of the preparation in Embodiment 3 of the present invention. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example 1:

[0033] Purple soil was selected and crushed into powder using a crusher. The powder was then sieved through a 100-mesh sieve to obtain 1000g of 100-mesh purple soil powder.

[0034] Add 50g of potassium carbonate (5% of the mass of purple clay powder), 80g of calcium carbonate (8% of the mass of purple clay powder), and 1000g of water (100% of the mass of purple clay powder) to 1000g of purple clay powder. Mix thoroughly with a mixer for 30 minutes to ensure uniform mixing and obtain a glaze slurry.

[0035] The glaze is applied to the unglazed ceramic body, and after air drying, it is placed in a muffle furnace and fired at a temperature of 1310℃. After cooling, a teacup with a brown rust-colored glaze with blue spots is obtained.

[0036] Example 2:

[0037] The purple soil was crushed and screened to obtain 1000g of 100-mesh purple soil powder.

[0038] Add 100g of potassium carbonate (10% of the mass of purple clay powder), 50g of calcium carbonate (5% of the mass of purple clay powder), and 1000g of water (100% of the mass of purple clay powder) to the mixture. Stir and mix for 30 minutes to ensure the materials are evenly mixed and obtain the glaze slurry.

[0039] The glaze is applied to the unglazed ceramic body and fired in a kiln at 1310℃ to obtain a teacup with a brown rust-colored glaze with blue spots.

[0040] Example 3:

[0041] Prepare 1000g of 100-mesh purple clay powder.

[0042] Add 90g of potassium carbonate (7.5% of the mass of purple clay powder), 120g of calcium carbonate (10% of the mass of purple clay powder), and 1000g of water (100% of the mass of purple clay powder). Stir and mix for 30 minutes to ensure the materials are evenly mixed and obtain the glaze slurry.

[0043] The glaze is applied to the unglazed ceramic body and fired in a kiln at 1310℃ to obtain a teacup with a blue glaze and a brownish-red rust-like glaze.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method for preparing rust-colored glaze based on purple clay, characterized in that: At least the following steps are included: S1: Process raw materials and select suitable raw materials for preparation; S2: The glaze slurry is prepared by mixing the raw material additives selected in S1 with water. S3: Apply the glaze slurry obtained from S2 to the surface of the body, dry it, and then fire it in a kiln. After firing, the porcelain body with iron rust glaze decoration is obtained.

2. The method for preparing rust-colored glaze based on purple clay according to claim 1, characterized in that: S1 includes at least the following steps: Purple soil was selected as the base material and crushed into powder. Then, the powder is screened using a sieve, and purple soil powder with a particle size of 100 mesh is selected for later use.

3. The method for preparing rust-colored glaze based on purple clay according to claim 1, characterized in that: S2 includes at least the following steps: Add potassium carbonate, calcium carbonate and water to the 100-mesh purple soil powder obtained by screening; The amount of potassium carbonate added is 5% to 10% of the mass of purple soil powder, the amount of calcium carbonate added is 8% to 12% of the mass of purple soil powder, and the amount of water added is 80% to 120% of the mass of purple soil powder. The purple clay powder is thoroughly mixed with potassium carbonate, calcium carbonate, and water to obtain a glaze slurry.

4. The method for preparing rust-colored glaze based on purple clay according to claim 1, characterized in that: The firing conditions in S3 are as follows: Firing in an oxidizing atmosphere, the temperature is increased from room temperature to 500℃ at a rate of 3℃ / min, and held at 500℃ for 60min; Then, the temperature was increased from 500°C to 580°C at a rate of 3°C / min, and held at 580°C for 50 minutes. Then, the temperature was increased from 500℃ to 1300℃ at a rate of 2℃ / min, and held at 1300℃ for 1 hour. Finally, cool to room temperature.

5. A rust-colored glaze based on purple clay, characterized by: The rust-colored glaze based on purple clay was prepared using the preparation method described in any one of claims 1-3.

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