CN111978078B - Non-brittle rock plate and preparation method thereof - Google Patents

Non-brittle rock plate and preparation method thereof Download PDF

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CN111978078B
CN111978078B CN202010864905.9A CN202010864905A CN111978078B CN 111978078 B CN111978078 B CN 111978078B CN 202010864905 A CN202010864905 A CN 202010864905A CN 111978078 B CN111978078 B CN 111978078B
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parts
silicon carbide
rock plate
rock
raw materials
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CN111978078A (en
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麦文英
汪加武
叶建明
王礼
石献忠
熊红炎
卢佩玉
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Guangdong Oubrunei Ceramics Co ltd
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Guangdong Oubrunei Ceramics Co ltd
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Abstract

The invention discloses a non-brittle cracked rock and a preparation method thereof, wherein the non-brittle cracked rock is prepared from the following raw materials in parts by weight: 40-55 parts of wollastonite, 25-40 parts of mullite, 15-20 parts of potassium feldspar, 10-20 parts of flint clay, 6-12 parts of calcined talc, 5-10 parts of high alumina, 4-8 parts of modified silicon carbide, 2-6 parts of dolomite, 2-5 parts of magnesium oxide, 2-5 parts of strontium carbonate, 0.8-1.8 parts of far infrared ceramic powder and 10-25 parts of reinforcing agent. The rock plate has excellent modulus of rupture and extremely high breaking strength, so that the rock plate is not easy to crack; the modulus of rupture and the breaking strength are obviously improved by adding the modified silicon carbide and the reinforcing agent into the formula of the rock plate.

Description

Non-brittle rock plate and preparation method thereof
Technical Field
The invention relates to the technical field of rock plates, in particular to a rock plate not easy to crack and a preparation method thereof.
Background
The ceramic rock plate is made of natural raw materials through a special process, pressing by a press, combining with an advanced production technology and firing at a high temperature of more than 1100 ℃, and can withstand the processing processes of cutting, drilling, polishing and the like.
The ceramic rock plate is mainly used in the field of household and kitchen plates. The existing rock plates are easily damaged in the using process, the transporting process and the installing process, so that the modulus of rupture and the breaking strength of the rock plates need to be improved, and the rock plates are not easy to break.
Disclosure of Invention
The invention provides a non-breakable rock plate and a preparation method thereof.
The invention adopts the following technical scheme for solving the technical problems:
a non-brittle rock plate is prepared from the following raw materials in parts by weight: 40-55 parts of wollastonite, 25-40 parts of mullite, 15-20 parts of potassium feldspar, 10-20 parts of flint clay, 6-12 parts of calcined talc, 5-10 parts of high alumina, 4-8 parts of modified silicon carbide, 2-6 parts of dolomite, 2-5 parts of magnesium oxide, 2-5 parts of strontium carbonate, 0.8-1.8 parts of far infrared ceramic powder and 10-25 parts of reinforcing agent.
The applicant of the invention finds in a large number of rock plate researches that a rock plate formula using wollastonite and potash feldspar as main raw materials can form a multi-element crystal phase by introducing calcium element, particularly an anorthite crystal phase, stress between the crystal phases can be released to a certain extent, and stress between crystal lattices is improved, so that the rock plate is not easy to crack.
As a preferable scheme, the non-breakable rock plate is prepared from the following raw materials in parts by weight: 40-50 parts of wollastonite, 25-35 parts of mullite, 15-18 parts of potassium feldspar, 10-15 parts of flint clay, 6-10 parts of calcined talc, 6-10 parts of bauxite, 4-7 parts of wollastonite, 2-5 parts of dolomite, 2-4 parts of modified silicon carbide, 2-4 parts of strontium carbonate, 0.8-1.5 parts of far infrared ceramic powder and 15-25 parts of reinforcing agent.
As a most preferable scheme, the non-breakable rock plate is prepared from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of flint clay, 8 parts of calcined talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far infrared ceramic powder and 20 parts of reinforcing agent.
As a preferable scheme, the reinforcing agent is composed of the following raw materials in parts by weight: 20-30 parts of zirconium dioxide, 15-25 parts of aluminum oxide, 10-20 parts of scandium oxide, 6-12 parts of ammonium fluoride and 5-10 parts of sodium hydroxymethyl cellulose.
The applicant of the invention finds in a great deal of research that the modulus of rupture and the breaking strength of the rock plate can be remarkably improved by adding the reinforcing agent, wherein the ammonium fluoride and the rock plate raw material (such as mullite) can form a skeleton porous structure and have uniform and continuous pore walls, so that the modulus of rupture and the breaking strength can be improved, and the effect of difficult fragmentation is achieved; scandium oxide has high melting point, high strength, better toughness and mechanical property with good elastic modulus, and zirconium dioxide and rock plate raw materials can also form a porous skeleton structure, so that the fracture modulus and the breaking strength can be improved, and the effect of difficult fragmentation is achieved.
In addition, aluminum oxide and zirconium dioxide can generate metal agglomeration, and the addition of the carbon nano tube can reduce the metal agglomeration.
As a preferable scheme, the reinforcing agent is composed of the following raw materials in parts by weight: 20-28 parts of zirconium dioxide, 15-22 parts of aluminum oxide, 10-15 parts of scandium oxide, 8-12 parts of ammonium fluoride and 5-8 parts of sodium hydroxymethyl cellulose.
As a most preferred scheme, the reinforcing agent consists of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride and 6 parts of sodium hydroxymethyl cellulose.
As a preferable scheme, the preparation method of the modified silicon carbide comprises the following steps:
s1: adding 2-6 parts of silicon carbide into 10-20 parts of 6-10 wt% ammonia water solution, stirring at the rotating speed of 100-200 rpm for 1-2 hours, filtering, and drying to obtain pretreated silicon carbide;
s2: and (3) adding the pretreated silicon carbide obtained in the step (S1) into 10-20 parts of 50-70% ethanol solution, adding 1-4 parts of carbon nano tube and 0.4-0.8 part of coupling agent, stirring at the rotating speed of 100-200 rpm for 1-2 hours, filtering, and drying to obtain the modified silicon carbide.
As a preferred embodiment, the coupling agent is KH-590.
The silicon carbide has the advantages of high hardness and high strength, is widely applied to the field of ceramic rock plates, can achieve the effects of complementation between quality and disadvantage and mutual promotion by compounding the modified silicon carbide and the carbon nano tubes, and can further obviously improve the fracture modulus and the breaking strength of the rock plates.
The invention also provides a preparation method of the rock plate which is not easy to crack, comprising the following steps:
s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;
s12: the non-brittle fractured rock slab powder is pressed and formed after being distributed by a press, and is dried by a drying kiln to obtain a non-brittle fractured rock slab green body;
s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1200-1300 ℃ for 100-150 min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.
Preferably, the sintering temperature is 1250 ℃ and the sintering time is 150 min.
The extension of the firing time can reduce the problem of sintering bubble generation to a certain extent, and can improve the modulus of rupture and the breaking strength of the rock plate to a certain extent.
The invention has the beneficial effects that: (1) the rock plate has excellent modulus of rupture and extremely high breaking strength, so that the rock plate is not easy to crack; (2) according to the invention, through the formula of the rock plate taking wollastonite and potassium feldspar as main raw materials, calcium element is introduced, a multi-element crystal phase can be formed, specifically, an anorthite crystal phase is formed, stress between the crystal phases can be released to a certain extent, and stress between crystal lattices is improved, so that the rock plate is not easy to crack, and the fracture modulus and the breaking strength are obviously improved by adding modified silicon carbide and a reinforcing agent into the formula of the rock plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless otherwise stated, "parts" in the present invention are parts by weight.
Example 1
A non-brittle rock plate is prepared from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of flint clay, 8 parts of calcined talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far infrared ceramic powder and 20 parts of reinforcing agent.
The reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride and 6 parts of sodium hydroxymethyl cellulose.
The preparation method of the modified silicon carbide comprises the following steps:
s1: adding 4 parts of silicon carbide into 12 parts of 8wt% ammonia water solution, stirring at the rotating speed of 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;
s2: and (3) adding the pretreated silicon carbide obtained in the step (S1) into 15 parts of 60% ethanol solution, adding 2 parts of carbon nano tube and 0.5 part of coupling agent, stirring at the rotating speed of 150rpm for 1.5h, filtering, and drying to obtain the modified silicon carbide.
The coupling agent is KH-590.
The preparation method of the non-breakable rock plate comprises the following steps:
s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;
s12: the non-brittle fractured rock slab powder is pressed and formed after being distributed by a press, and is dried by a drying kiln to obtain a non-brittle fractured rock slab green body;
s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1250 ℃ for 150min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.
Example 2
A non-brittle rock plate is prepared from the following raw materials in parts by weight: 40 parts of wollastonite, 25 parts of mullite, 15 parts of potassium feldspar, 10 parts of flint clay, 6 parts of calcined talc, 5 parts of high alumina, 4 parts of modified silicon carbide, 2 parts of dolomite, 2 parts of magnesium oxide, 2 parts of strontium carbonate, 0.8 part of far infrared ceramic powder and 10 parts of reinforcing agent.
The reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride and 6 parts of sodium hydroxymethyl cellulose.
The preparation method of the modified silicon carbide comprises the following steps:
s1: adding 4 parts of silicon carbide into 12 parts of 8wt% ammonia water solution, stirring at the rotating speed of 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;
s2: and (3) adding the pretreated silicon carbide obtained in the step (S1) into 15 parts of 60% ethanol solution, adding 2 parts of carbon nano tube and 0.5 part of coupling agent, stirring at the rotating speed of 150rpm for 1.5h, filtering and drying to obtain the modified silicon carbide.
The coupling agent is KH-590.
The preparation method of the non-breakable rock plate comprises the following steps:
s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;
s12: the non-brittle fractured rock slab powder is pressed and formed after being distributed by a press, and is dried by a drying kiln to obtain a non-brittle fractured rock slab green body;
s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1250 ℃ for 150min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.
Example 3
A non-brittle rock plate is prepared from the following raw materials in parts by weight: 55 parts of wollastonite, 40 parts of mullite, 20 parts of potassium feldspar, 20 parts of flint clay, 12 parts of calcined talc, 10 parts of high alumina, 8 parts of modified silicon carbide, 6 parts of dolomite, 5 parts of magnesium oxide, 5 parts of strontium carbonate, 1.8 parts of far infrared ceramic powder and 25 parts of reinforcing agent.
The reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride and 6 parts of sodium hydroxymethyl cellulose.
The preparation method of the modified silicon carbide comprises the following steps:
s1: adding 4 parts of silicon carbide into 12 parts of 8wt% ammonia water solution, stirring at the rotating speed of 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;
s2: and (3) adding the pretreated silicon carbide obtained in the step (S1) into 15 parts of 60% ethanol solution, adding 2 parts of carbon nano tube and 0.5 part of coupling agent, stirring at the rotating speed of 150rpm for 1.5h, filtering, and drying to obtain the modified silicon carbide.
The coupling agent is KH-590.
The preparation method of the non-breakable rock plate comprises the following steps:
s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;
s12: the non-brittle fractured rock slab powder is pressed and formed after being distributed by a press, and is dried by a drying kiln to obtain a non-brittle fractured rock slab green body;
s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1250 ℃ for 150min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.
Example 4
A non-brittle rock plate is prepared from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of flint clay, 8 parts of calcined talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far infrared ceramic powder and 20 parts of reinforcing agent.
The reinforcing agent is composed of the following raw materials in parts by weight: 20 parts of zirconium dioxide, 15 parts of aluminum oxide, 10 parts of scandium oxide, 6 parts of ammonium fluoride and 5 parts of sodium hydroxymethyl cellulose.
The preparation method of the modified silicon carbide comprises the following steps:
s1: adding 4 parts of silicon carbide into 12 parts of 8wt% ammonia water solution, stirring at the rotating speed of 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;
s2: and (3) adding the pretreated silicon carbide obtained in the step (S1) into 15 parts of 60% ethanol solution, adding 2 parts of carbon nano tube and 0.5 part of coupling agent, stirring at the rotating speed of 150rpm for 1.5h, filtering, and drying to obtain the modified silicon carbide.
The coupling agent is KH-590.
The preparation method of the non-breakable rock plate comprises the following steps:
s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;
s12: the non-brittle fractured rock slab powder is pressed and formed after being distributed by a press, and is dried by a drying kiln to obtain a non-brittle fractured rock slab green body;
s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1250 ℃ for 150min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.
Example 5
A non-brittle rock plate is prepared from the following raw materials in parts by weight: 42 parts of wollastonite, 30 parts of mullite, 16 parts of potassium feldspar, 12 parts of flint clay, 8 parts of calcined talc, 7 parts of high alumina, 5 parts of wollastonite, 4 parts of dolomite, 3 parts of modified silicon carbide, 2.5 parts of strontium carbonate, 1 part of far infrared ceramic powder and 20 parts of reinforcing agent.
The reinforcing agent is composed of the following raw materials in parts by weight: 30 parts of zirconium dioxide, 25 parts of aluminum oxide, 20 parts of scandium oxide, 12 parts of ammonium fluoride and 10 parts of sodium hydroxymethyl cellulose.
The preparation method of the modified silicon carbide comprises the following steps:
s1: adding 4 parts of silicon carbide into 12 parts of 8wt% ammonia water solution, stirring at the rotating speed of 150rpm for 1.2h, filtering, and drying to obtain pretreated silicon carbide;
s2: and (3) adding the pretreated silicon carbide obtained in the step (S1) into 15 parts of 60% ethanol solution, adding 2 parts of carbon nano tube and 0.5 part of coupling agent, stirring at the rotating speed of 150rpm for 1.5h, filtering, and drying to obtain the modified silicon carbide.
The coupling agent is KH-590.
The preparation method of the non-breakable rock plate comprises the following steps:
s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;
s12: the non-brittle fractured rock slab powder is pressed and formed after being distributed by a press, and is dried by a drying kiln to obtain a non-brittle fractured rock slab green body;
s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1250 ℃ for 150min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.
Comparative example 1
Comparative example 1 differs from example 1 in that comparative example 1 does not contain modified silicon carbide, and the other is the same.
Comparative example 2
Comparative example 2 differs from example 1 in that comparative example 2 replaces the modified silicon carbide with silicon carbide, all other things being equal.
Comparative example 3
Comparative example 3 is different from example 1 in that carbon fiber is used instead of carbon nanotubes in the preparation method of modified silicon carbide described in comparative example 3, and the rest is the same.
Comparative example 4
Comparative example 4 differs from example 1 in that comparative example 4 does not contain a reinforcing agent, and the other is the same.
Comparative example 5
Comparative example 5 differs from example 1 in that the reinforcing agent of comparative example 5 does not contain ammonium fluoride, and the other things are the same.
Comparative example 6
Comparative example 6 differs from example 1 in that the reinforcing agent of comparative example 5 does not contain zirconium dioxide, and the other things are the same.
Comparative example 7
Comparative example 7 differs from example 1 in that the enhancer of comparative example 5 does not contain scandia, and the other things are the same.
Comparative example 8
Comparative example 8 differs from example 1 in that the reinforcing agent of comparative example 5 does not contain alumina, and the other things are the same.
To further demonstrate the effect of the present invention, the following test methods were provided:
1. the SKZ-10000A-600 digital display ceramic tile fracture modulus and failure strength tester is used for testing the fracture modulus and failure strength, and the test is shown in table 1.
TABLE 1 test results
Figure DEST_PATH_IMAGE001
As can be seen from table 1, the rock panels according to the invention have an excellent modulus of rupture and an extremely high breaking strength, so that they are not easily broken; compared with the examples 1-3, the proportion of different rock plates can influence the modulus of rupture and the breaking strength, wherein the example 1 is the optimal proportion; comparing examples 1, 4 and 5, it can be seen that the ratio of different reinforcing agents can affect the modulus of rupture and the breaking strength, wherein example 1 is the best reinforcing agent ratio; as can be seen from the comparison of example 1 and comparative examples 1 to 3, the modified silicon carbide of the present invention can significantly improve the modulus of rupture and the breaking strength; as can be seen from comparison of example 1 and comparative examples 4 to 8, the reinforcing agent of the present invention can significantly improve the modulus of rupture and the breaking strength.
In light of the foregoing description of preferred embodiments according to the invention, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims (6)

1. The rock plate not easy to crack is characterized by being prepared from the following raw materials in parts by weight: 40-55 parts of wollastonite, 25-40 parts of mullite, 15-20 parts of potassium feldspar, 10-20 parts of flint clay, 6-12 parts of calcined talc, 5-10 parts of high alumina, 4-8 parts of modified silicon carbide, 2-6 parts of dolomite, 2-5 parts of magnesium oxide, 2-5 parts of strontium carbonate, 0.8-1.8 parts of far infrared ceramic powder and 10-25 parts of reinforcing agent;
the preparation method of the modified silicon carbide comprises the following steps:
s1: adding 2-6 parts of silicon carbide into 10-20 parts of 6-10 wt% ammonia water solution, stirring at the rotating speed of 100-200 rpm for 1-2 hours, filtering, and drying to obtain pretreated silicon carbide;
s2: adding the pretreated silicon carbide obtained in the step S1 into 10-20 parts of 50-70% ethanol solution, adding 1-4 parts of carbon nano tube and 0.4-0.8 part of coupling agent, stirring at the rotating speed of 100-200 rpm for 1-2 hours, filtering, and drying to obtain the modified silicon carbide;
the reinforcing agent is composed of the following raw materials in parts by weight: 20-30 parts of zirconium dioxide, 15-25 parts of aluminum oxide, 10-20 parts of scandium oxide, 6-12 parts of ammonium fluoride and 5-10 parts of sodium hydroxymethyl cellulose.
2. The non-breakable rock plate according to claim 1, wherein the reinforcing agent is composed of the following raw materials in parts by weight: 20-28 parts of zirconium dioxide, 15-22 parts of aluminum oxide, 10-15 parts of scandium oxide, 8-12 parts of ammonium fluoride and 5-8 parts of sodium hydroxymethyl cellulose.
3. The non-breakable rock plate according to claim 1, wherein the reinforcing agent is composed of the following raw materials in parts by weight: 24 parts of zirconium dioxide, 18 parts of aluminum oxide, 12 parts of scandium oxide, 10 parts of ammonium fluoride and 6 parts of sodium hydroxymethyl cellulose.
4. The non-friable rock panel of claim 1, wherein the coupling agent is KH-590.
5. The method for preparing a non-breakable rock plate according to any one of claims 1 to 4, comprising the steps of:
s11: weighing the raw materials according to the weight percentage, adding the raw materials into a ball mill, uniformly mixing to obtain mixed slurry, and obtaining the non-breakable rock slab powder through sieving, ageing, iron removal and ink-jet drying;
s12: distributing the non-brittle fractured rock slab powder by a press, then performing compression molding, and drying by a drying kiln to obtain a non-brittle fractured rock slab green body;
s13: conveying the rock plate green body which is not easy to crack by a belt, carrying out ink-jet decoration, firing the rock plate green body in a roller kiln at a high temperature of 1200-1300 ℃ for 100-150 min, cooling, edging and packaging to obtain the rock plate which is not easy to crack.
6. The method for preparing a non-breakable rock plate according to claim 5, wherein the firing temperature is 1250 ℃ and the firing time is 150 min.
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