High-hardness and high-toughness bent rock plate and preparation method thereof

Abstract

The high-hardness and high-toughness bent rock plate is prepared from the following raw materials in parts by weight: 15 to 20 parts of kaolin, 15 to 20 parts of selected ball clay, 10 to 15 parts of ultra-white sand, 10 to 15 parts of potassium feldspar, 6 to 10 parts of diopside modifier, 5 to 8 parts of calcined talc, 4 to 7 parts of bentonite blended tremolite agent, 0.3 to 0.4 part of sodium tripolyphosphate dispergator and 2 to 5 parts of performance additive. According to the rock plate, the kaolin, the selected ball clay, the ultra-white sand and other raw materials are matched with the diopside modifier and the bentonite to blend the tremolite agent, the two materials are coordinated, blended and jointly synergized, and the obtained product is excellent in toughness, bending performance and hardness performance coordination effect and remarkable in acid corrosion resistance and cold resistance stability effect.

Description

Technical Field

[0001] The present invention relates to the technical field of curved rock slabs, and in particular to a high-hardness and high-toughness curved rock slab and a preparation method thereof. Background Art

[0002] Slate is mainly used in the field of home furnishing and kitchen panels. As a new species in the field of home furnishing, slate home furnishing has the characteristics of large specifications, strong plasticity, diverse colors, high temperature resistance, abrasion resistance, anti-penetration, acid and alkali resistance, zero formaldehyde, environmental protection and health compared with other home furnishing products.

[0003] The impact toughness and bending strength properties of existing rock slabs are difficult to coordinate. At the same time, the product's hardness performance is poor, and the product's acid corrosion resistance and cold stability are poor, which limits the product's use efficiency. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a high-hardness and high-toughness curved rock plate and a preparation method thereof to solve the problems raised in the above-mentioned background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution: The present invention provides a high-hardness and high-toughness curved rock plate, comprising the following raw materials in parts by weight: 15-20 parts of kaolin, 15-20 parts of selected ball clay, 10-15 parts of super white sand, 10-15 parts of potassium feldspar, 6-10 parts of diopside modifier, 5-8 parts of calcined talc, 4-7 parts of bentonite and tremolite agent, 0.3-0.4 parts of sodium tripolyphosphate dissolving agent, 2-5 parts of modification auxiliary agent; The modified auxiliary agent is prepared by fully mixing 5 parts of cordierite, 5 parts of calcium feldspar, 5 parts of mullite, 5 parts of montmorillonite and 5 parts of kaolinite.

[0006] Preferably, the rock board comprises the following raw materials in parts by weight: 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of super white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of burned talc, 5.5 parts of bentonite and tremolite agent, 0.35 parts of sodium tripolyphosphate dissolving agent, and 3.5 parts of modification aid.

[0007] Preferably, the preparation method of the diopside modifier is: S1: Stir and mix diopside in a sodium citrate solution that is 3-4 times the total amount of diopside, then add a silane coupling agent that is 10-15% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent; S2: adding 2-5 parts of lanthanum chloride solution and 1-3 parts of wollastonite to 6-8 parts of sodium dodecylbenzene sulfonate solution, and then adding 2-4 parts of calcined zinc oxide, stirring thoroughly to obtain a lanthanum solution; S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1000-1500r / min, the ball milling is for 1h, after the ball milling is completed, washing, filtering and drying to obtain the diopside modifier.

[0008] Preferably, the mass fraction of the sodium citrate solution is 2-5%; and the silane coupling agent is silane coupling agent KH560.

[0009] Preferably, the mass fraction of the lanthanum chloride solution is 2-4%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%.

[0010] Preferably, the preparation method of the calcined zinc oxide is: The zinc oxide is calcined at 210-220°C for 10-15 minutes, then reduced to 55-60°C at a rate of 2-5°C / min, kept warm for 5-10 minutes, then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

[0011] Preferably, the mass fraction of the cobalt nitrate solution is 2-5%.

[0012] Preferably, the immersion power for full immersion is 350-400W, and the immersion time is 20-30min.

[0013] Preferably, the preparation method of the bentonite-tremolite agent is: S11: irradiating the bentonite in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated bentonite after the irradiation is completed; S12: 5-8 parts of irradiated bentonite, 2-3 parts of 2-5% by mass sodium silicate solution, 1-3 parts of 4% by mass dopamine hydrochloride solution and 2-4 parts of tremolite are mixed and ball-milled at a ball-milling speed of 1000-1500 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain bentonite-tremolite agent.

[0014] The present invention also provides a method for preparing a high-hardness and high-toughness curved rock plate, comprising the following steps: The raw materials were weighed according to their weight, and wet-milled at a speed of 1000 r / min for 2 h. They were then pressed in a mold at a pressure of 10 MPa for 20 min. Finally, they were sintered at 1350°C for 1 h. After sintering, they were cooled to room temperature to obtain a rock slab.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The rock board of the present invention adopts kaolin, selected ball clay and super white sand as raw materials, and is combined with diopside modifier, bentonite and tremolite agent. The two are coordinated and coordinated to enhance the synergy, so that the product has excellent coordination effect in toughness, bending performance and hardness performance, and the product has remarkable acid corrosion resistance and cold stability. The diopside modifier adopts diopside combined with sodium citrate solution and silane coupling agent to optimize the dispersibility and interface of diopside. At the same time, the lanthanum liquid is added for blending and ball milling to optimize the performance effect of the system. The lanthanum liquid adopts lanthanum chloride solution combined with wollastonite, and at the same time, dodecylbenzene is used to treat the diopside modifier. Sodium sulfonate solution and calcined zinc oxide are used to strengthen the performance of the system through the coordination and matching of the raw materials. At the same time, the calcined zinc oxide is subjected to segmented heat treatment and then immersed in ultrasonic treatment with cobalt nitrate solution to better coordinate the performance of the system. Bentonite is irradiated in a proton irradiation box to stimulate the activity of the bentonite. At the same time, sodium silicate solution, 4% by mass dopamine hydrochloride solution and tremolite are blended and ball-milled. The diopside modifier is reinforced through the coordination and matching of the raw materials, so that the performance of the product is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of differential thermal analysis of the present invention. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] A high-hardness and high-toughness curved rock plate of this embodiment includes the following raw materials in parts by weight: 15-20 parts of kaolin, 15-20 parts of selected ball clay, 10-15 parts of super white sand, 10-15 parts of potassium feldspar, 6-10 parts of diopside modifier, 5-8 parts of calcined talc, 4-7 parts of bentonite and tremolite agent, 0.3-0.4 parts of sodium tripolyphosphate debonding agent, 2-5 parts of modification aid. The modification aid is made by fully blending 5 parts of cordierite, 5 parts of calcium feldspar, 5 parts of mullite, 5 parts of montmorillonite and 5 parts of kaolinite.

[0019] The rock plate of this embodiment includes the following raw materials in parts by weight: 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of super white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of burned talc, 5.5 parts of bentonite and tremolite agent, 0.35 parts of sodium tripolyphosphate dissolving agent, and 3.5 parts of modification aid.

[0020] The preparation method of the diopside modifier of this embodiment is: S1: Stir and mix diopside in a sodium citrate solution that is 3-4 times the total amount of diopside, then add a silane coupling agent that is 10-15% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent; S2: adding 2-5 parts of lanthanum chloride solution and 1-3 parts of wollastonite to 6-8 parts of sodium dodecylbenzene sulfonate solution, and then adding 2-4 parts of calcined zinc oxide, stirring thoroughly to obtain a lanthanum solution; S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1000-1500r / min, the ball milling is for 1h, after the ball milling is completed, washing, filtering and drying to obtain the diopside modifier.

[0021] The mass fraction of the sodium citrate solution in this embodiment is 2-5%; the silane coupling agent is silane coupling agent KH560.

[0022] The mass fraction of the lanthanum chloride solution in this embodiment is 2-4%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%.

[0023] The preparation method of calcined zinc oxide in this embodiment is: The zinc oxide is calcined at 210-220°C for 10-15 minutes, then reduced to 55-60°C at a rate of 2-5°C / min, kept warm for 5-10 minutes, then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

[0024] The mass fraction of the cobalt nitrate solution in this embodiment is 2-5%.

[0025] The immersion power for full immersion in this embodiment is 350-400W, and the immersion time is 20-30min.

[0026] The preparation method of bentonite and tremolite agent of the present embodiment is: S11: irradiating the bentonite in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated bentonite after the irradiation is completed; S12: 5-8 parts of irradiated bentonite, 2-3 parts of 2-5% by mass sodium silicate solution, 1-3 parts of 4% by mass dopamine hydrochloride solution and 2-4 parts of tremolite are mixed and ball-milled at a ball-milling speed of 1000-1500 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain bentonite-tremolite agent.

[0027] A method for preparing a high-hardness and high-toughness curved rock plate in this embodiment includes the following steps: The raw materials were weighed according to their weight, and wet-milled at a speed of 1000 r / min for 2 h. They were then pressed in a mold at a pressure of 10 MPa for 20 min. Finally, they were sintered at 1350°C for 1 h. After sintering, they were cooled to room temperature to obtain a rock slab.

[0028] Example 1. A high-hardness and high-toughness curved rock plate of this embodiment includes the following raw materials in parts by weight: 15 parts of kaolin, 15 parts of selected ball clay, 10 parts of super white sand, 10 parts of potassium feldspar, 6 parts of diopside modifier, 5 parts of burned talc, 4 parts of bentonite and tremolite agent, 0.3 parts of sodium tripolyphosphate degumming agent, and 2 parts of modification aid.

[0029] The preparation method of the diopside modifier of this embodiment is: S1: Stir and mix diopside in a sodium citrate solution 3 times the total amount of diopside, then add a silane coupling agent 10% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent; S2: Add 2 parts of lanthanum chloride solution and 1 part of wollastonite to 6 parts of sodium dodecylbenzene sulfonate solution, then add 2 parts of calcined zinc oxide, and stir thoroughly to obtain a lanthanum solution; S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1000r / min, the ball milling is for 1h, and after the ball milling is completed, washing, filtering and drying are performed to obtain the diopside modifier.

[0030] The mass fraction of the sodium citrate solution in this embodiment is 2%; the silane coupling agent is silane coupling agent KH560.

[0031] The mass fraction of the lanthanum chloride solution in this embodiment is 2%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 5%.

[0032] The preparation method of calcined zinc oxide in this embodiment is: The zinc oxide was calcined at 210°C for 10 min, then the temperature was reduced to 55°C at a rate of 2°C / min, kept warm for 5 min, and then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

[0033] The mass fraction of the cobalt nitrate solution in this embodiment is 2%.

[0034] The immersion power for full immersion in this embodiment is 350W, and the immersion time is 20 minutes.

[0035] The preparation method of bentonite and tremolite agent of the present embodiment is: S11: irradiating the bentonite in a proton irradiation box for 10 minutes at an irradiation power of 350 W, and obtaining irradiated bentonite after the irradiation is completed; S12: 5 parts of irradiated bentonite, 2 parts of 2% by mass sodium silicate solution, 1 part of 4% by mass dopamine hydrochloride solution and 2 parts of tremolite are blended and ball-milled at a ball-milling speed of 1000 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain bentonite-tremolite agent.

[0036] A method for preparing a high-hardness and high-toughness curved rock plate in this embodiment includes the following steps: The raw materials were weighed according to their weight, and wet-milled at a speed of 1000 r / min for 2 h. They were then pressed in a mold at a pressure of 10 MPa for 20 min. Finally, they were sintered at 1350°C for 1 h. After sintering, they were cooled to room temperature to obtain a rock slab.

[0037] Example 2. A high-hardness and high-toughness curved rock plate of this embodiment includes the following raw materials in parts by weight: 20 parts of kaolin, 20 parts of selected ball clay, 15 parts of super white sand, 15 parts of potassium feldspar, 10 parts of diopside modifier, 8 parts of burned talc, 7 parts of bentonite and tremolite agent, 0.3 parts of sodium tripolyphosphate degumming agent, and 2 parts of modification aid.

[0038] The preparation method of the diopside modifier of this embodiment is: S1: Stir and mix diopside in a sodium citrate solution of 4 times the total amount of diopside, then add a silane coupling agent of 15% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent; S2: Add 5 parts of lanthanum chloride solution and 3 parts of wollastonite to 8 parts of sodium dodecylbenzene sulfonate solution, then add 4 parts of calcined zinc oxide, and stir thoroughly to obtain a lanthanum solution; S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1500r / min, the ball milling is for 1h, and after the ball milling is completed, washing, filtering and drying are performed to obtain the diopside modifier.

[0039] The mass fraction of the sodium citrate solution in this embodiment is 5%; the silane coupling agent is silane coupling agent KH560.

[0040] The mass fraction of the lanthanum chloride solution in this embodiment is 4%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 8%.

[0041] The preparation method of calcined zinc oxide in this embodiment is: The zinc oxide was calcined at 220°C for 15 minutes, then the temperature was reduced to 60°C at a rate of 5°C / min, kept warm for 10 minutes, and then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

[0042] The mass fraction of the cobalt nitrate solution in the present embodiment is 5%.

[0043] The immersion power for full immersion in this embodiment is 400 W, and the immersion time is 30 min.

[0044] The preparation method of bentonite and tremolite agent of the present embodiment is: S11: irradiating the bentonite in a proton irradiation box for 15 minutes at an irradiation power of 400 W, and obtaining irradiated bentonite after the irradiation is completed; S12: 8 parts of irradiated bentonite, 3 parts of 5% by mass sodium silicate solution, 3 parts of 4% by mass dopamine hydrochloride solution and 4 parts of tremolite are blended and ball-milled at a speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain bentonite-tremolite agent.

[0045] A method for preparing a high-hardness and high-toughness curved rock plate in this embodiment includes the following steps: The raw materials were weighed according to their weight, and wet-milled at a speed of 1000 r / min for 2 h. They were then pressed in a mold at a pressure of 10 MPa for 20 min. Finally, they were sintered at 1350°C for 1 h. After sintering, they were cooled to room temperature to obtain a rock slab.

[0046] Example 3. A high-hardness and high-toughness curved rock plate of this embodiment includes the following raw materials in parts by weight: 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of super white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of burned talc, 5.5 parts of bentonite and tremolite agent, 0.3 parts of sodium tripolyphosphate dissolving agent, and 2 parts of modification aid.

[0047] The preparation method of the diopside modifier of this embodiment is: S1: Stir and mix diopside in a sodium citrate solution of 3.5 times the total amount of diopside, then add a silane coupling agent of 12.5% ​​of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent; S2: adding 3.5 parts of lanthanum chloride solution and 2 parts of wollastonite to 7 parts of sodium dodecylbenzene sulfonate solution, and then adding 3 parts of calcined zinc oxide, stirring thoroughly to obtain a lanthanum solution; S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1250r / min, the ball milling is for 1h, and after the ball milling is completed, washing, filtering and drying are performed to obtain the diopside modifier.

[0048] The mass fraction of the sodium citrate solution in this embodiment is 3.5%; the silane coupling agent is silane coupling agent KH560.

[0049] The mass fraction of the lanthanum chloride solution in this embodiment is 3%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 6.5%.

[0050] The preparation method of calcined zinc oxide in this embodiment is: The zinc oxide was calcined at 215°C for 12.5 min, then the temperature was reduced to 57°C at a rate of 3.5°C / min, kept warm for 7.5 min, and then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

[0051] The mass fraction of the cobalt nitrate solution in this embodiment is 3.5%.

[0052] The immersion power for full immersion in this embodiment is 375W, and the immersion time is 25 minutes.

[0053] The preparation method of bentonite and tremolite agent of the present embodiment is: S11: irradiating the bentonite in a proton irradiation box for 12.5 minutes at an irradiation power of 375 W, and obtaining irradiated bentonite after the irradiation is completed; S12: 6.5 parts of irradiated bentonite, 2.5 parts of 3.5% by mass sodium silicate solution, 2 parts of 4% by mass dopamine hydrochloride solution and 3 parts of tremolite are blended and ball-milled at a speed of 1250 r / min for 1 h. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain bentonite-tremolite agent.

[0054] A method for preparing a high-hardness and high-toughness curved rock plate in this embodiment includes the following steps: The raw materials were weighed according to their weight, and wet-milled at a speed of 1000 r / min for 2 h. They were then pressed in a mold at a pressure of 10 MPa for 20 min. Finally, they were sintered at 1350°C for 1 h. After sintering, they were cooled to room temperature to obtain a rock slab.

[0055] Comparative Example 1. The difference from Example 3 is that no diopside modifier is added.

[0056] Comparative Example 2. The difference from Example 3 is that no lanthanum liquid is added in the preparation of the diopside modifier.

[0057] Comparative Example 3. The difference from Example 3 is that calcined zinc oxide is not added in the preparation of the lanthanum liquid.

[0058] Comparative Example 4. The difference from Example 3 is that the calcined zinc oxide is directly replaced by the zinc oxide raw material.

[0059] Comparative Example 5. The difference from Example 3 is that no lanthanum chloride solution or wollastonite is added to the lanthanum liquid.

[0060] Comparative Example 6. The difference from Example 3 is that the diopside agent is replaced by diopside.

[0061] Comparative Example 7. The difference from Example 3 is that no bentonite or tremolite agent is added.

[0062] Comparative Example 8. The difference from Example 3 is that step S12 is not used in the preparation of bentonite and tremolite agent.

[0063] The products of Examples 1-3 and Comparative Examples 1-8 were subjected to performance tests. The products were placed at -5°C for 12 hours, and then placed under 2% hydrochloric acid mist for 24 hours to test the cold resistance and acid corrosion resistance of the products.

[0064] It can be seen from comparative examples 1-8 and examples 1-3 that the product of example 3 has excellent impact toughness, bending strength and hardness performance, and the product has significant cold resistance and acid corrosion resistance stability effects; The present invention does not add one of the diopside modifier and the bentonite modifier, and the performance of the product deteriorates significantly. The two are used in combination to achieve synergistic effects, and the product performance effect is significant. The performance of the products tended to deteriorate when no lanthanum liquid was added to the preparation of the diopside modifier, no calcined zinc oxide was added to the preparation of the lanthanum liquid, the calcined zinc oxide was directly replaced by zinc oxide raw material, no lanthanum chloride solution was added to the lanthanum liquid, and wollastonite and diopside agents were replaced by diopside. Only the diopside modifier obtained by treating the lanthanum liquid and diopside agent of the present invention had a significant effect on improving the performance of the product. At the same time, the S12 step was not used in the treatment of bentonite and tremolite agent, and the performance of the product also tended to deteriorate. By adopting the specific process of the present invention, the impact toughness, bending strength and hardness of the prepared product are improved in a coordinated manner, and the cold resistance and acid corrosion resistance of the product are significantly improved. The effects of the present invention cannot be achieved by adopting other methods instead.

[0065] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-hardness and high-toughness curved rock plate, characterized in that: It includes the following raw materials in parts by weight: 15-20 parts of kaolin, 15-20 parts of selected ball clay, 10-15 parts of super white sand, 10-15 parts of potassium feldspar, 6-10 parts of diopside modifier, 5-8 parts of burned talc, 4-7 parts of bentonite and tremolite agent, 0.3-0.4 parts of sodium tripolyphosphate degumming agent, and 2-5 parts of modification aid.

2. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The rock plate includes the following raw materials in parts by weight: 17.5 parts of kaolin, 17.5 parts of selected ball clay, 12.5 parts of super white sand, 12.5 parts of potassium feldspar, 8 parts of diopside modifier, 6.5 parts of burned talc, 5.5 parts of bentonite and tremolite agent, 0.35 parts of sodium tripolyphosphate dissolving agent, and 3.5 parts of modification aid.

3. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The preparation method of the diopside modifier is: S1: Stir and mix diopside in a sodium citrate solution that is 3-4 times the total amount of diopside, then add a silane coupling agent that is 10-15% of the total amount of diopside to the diopside, and continue stirring to obtain a diopside agent; S2: adding 2-5 parts of lanthanum chloride solution and 1-3 parts of wollastonite to 6-8 parts of sodium dodecylbenzene sulfonate solution, and then adding 2-4 parts of calcined zinc oxide, stirring thoroughly to obtain a lanthanum solution; S3: adding the lanthanum liquid to the diopside agent at a weight ratio of 2:5, blending and ball milling, the ball milling speed is 1000-1500r / min, the ball milling is for 1h, after the ball milling is completed, washing, filtering and drying to obtain the diopside modifier.

4. The high-hardness and high-toughness curved rock plate according to claim 3, characterized in that: The mass fraction of the sodium citrate solution is 2-5%; the silane coupling agent is silane coupling agent KH560.

5. The high-hardness and high-toughness curved rock plate according to claim 3, characterized in that: The mass fraction of the lanthanum chloride solution is 2-4%; the mass fraction of the sodium dodecylbenzene sulfonate solution is 5-8%.

6. The high-hardness and high-toughness curved rock plate according to claim 3, characterized in that: The preparation method of the calcined zinc oxide is: The zinc oxide is calcined at 210-220°C for 10-15 minutes, then reduced to 55-60°C at a rate of 2-5°C / min, kept warm for 5-10 minutes, then immersed in a sufficient amount of cobalt nitrate solution, then filtered and dried to obtain calcined zinc oxide.

7. The high-hardness and high-toughness curved rock plate according to claim 6, characterized in that: The mass fraction of the cobalt nitrate solution is 2-5%.

8. The high-hardness and high-toughness curved rock plate according to claim 6, characterized in that: The immersion power for full immersion is 350-400W, and the immersion time is 20-30min.

9. The high-hardness and high-toughness curved rock plate according to claim 1, characterized in that: The preparation method of the bentonite-tremolite agent is as follows: S11: irradiating the bentonite in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated bentonite after the irradiation is completed; S12: 5-8 parts of irradiated bentonite, 2-3 parts of 2-5% by mass sodium silicate solution, 1-3 parts of 4% by mass dopamine hydrochloride solution and 2-4 parts of tremolite are mixed and ball-milled at a ball-milling speed of 1000-1500 r / min for 1 hour. After the ball-milling is completed, the mixture is washed with water, filtered and dried to obtain bentonite-tremolite agent.

10. A method for preparing a high-hardness and high-toughness curved rock plate as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: The raw materials were weighed according to their weight, and wet-milled at a speed of 1000 r / min for 2 h. They were then pressed in a mold at a pressure of 10 MPa for 20 min. Finally, they were sintered at 1350°C for 1 h. After sintering, they were cooled to room temperature to obtain a rock slab.

Images