CN114409416A - Production process of high-temperature-resistant ceramic - Google Patents

Production process of high-temperature-resistant ceramic Download PDF

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Publication number
CN114409416A
CN114409416A CN202111682400.1A CN202111682400A CN114409416A CN 114409416 A CN114409416 A CN 114409416A CN 202111682400 A CN202111682400 A CN 202111682400A CN 114409416 A CN114409416 A CN 114409416A
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sintering
temperature
biscuit
less
production process
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陈天龙
陈圣贤
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Zhejiang Cencera New Material Co ltd
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Zhejiang Cencera New Material Co ltd
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
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  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a production process of high-temperature-resistant ceramic, which is characterized by comprising the following steps: 1) preparing raw materials; 2) milling; 3) pulping; 4) pouring and forming; 5) drying; 6) sintering; 7) and (6) machining. The invention adopts specific raw materials and the proportion of the raw materials to manufacture the high-temperature resistant ceramic, the produced ceramic has the main characteristics of high thermal shock resistance, high-temperature resistance, high purity and no pollution to the nickel-based alloy, and can be manufactured into a crucible for smelting the nickel-based alloy.

Description

Production process of high-temperature-resistant ceramic
Technical Field
The invention relates to the technical field of ceramic production, in particular to a production process of high-temperature-resistant ceramic.
Background
The ceramic is a general term of pottery and porcelain, is also an industrial art in China, and is wild and simple ancient painted pottery and black pottery in China in the age of the stone novelties. Ceramics have different textures and properties. Pottery is made of clay with high viscosity and high plasticity as main material, and has opaque, fine pores and weak hydroscopicity. The porcelain is made of clay, feldspar and quartz, is semitransparent, does not absorb water, is corrosion resistant, has hard and compact matrix, and is crisp when being knocked. The traditional ceramic handicraft in China is high in quality, beautiful in shape, high in artistic value and famous in the world.
The application of the ceramic is very wide, for example, the ceramic is manufactured into a crucible for smelting nickel-based alloy, one of the main applications of the nickel-based alloy is an aircraft engine blade, the temperature for smelting the nickel-based alloy needs to reach 1500-1650 ℃, and the current crucible is difficult to bear the temperature, so that the nickel-based alloy is difficult to smelt, and therefore, a production process of high-temperature-resistant ceramic is provided for solving the problem.
Disclosure of Invention
The invention aims to provide a production process of high-temperature-resistant ceramics, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
the production process of the high-temperature resistant ceramic is characterized by comprising the following steps:
1) preparing raw materials: 29-35 wt% of silicon dioxide (SiO2), 64-71 wt% of aluminum oxide (Al2O3), 0.17-0.22 wt% of titanium dioxide (TiO2) or less, 0.12-0.23 wt% of sodium oxide (Na2O) or less, 0.02-0.12 wt% of ferric oxide (Fe2O3) or less, 0.01-0.14 wt% of magnesium oxide (MgO) or less, and 0.02-0.08 wt% of potassium oxide (K2O);
2) milling: the powder of the raw material in the step 1) has better particle morphology and bulk density through a powder grinding device;
3) pulping: the raw material pulverized in the step 2) has good forming performances such as fluidity, viscosity and the like through pulping equipment;
4) pouring and forming: pouring the slurry prepared in the step 3) into a mold, curing the slurry in the mold, and demolding to form a biscuit;
5) and (3) drying: fully drying the biscuit in the step 4) through a drying furnace to ensure that the biscuit has primary strength so as to prepare for sintering of the next procedure;
6) and (3) sintering: sintering the biscuit dried in the step 5) to form a ceramic product;
7) and (3) machining: and (3) processing the ceramic product sintered in the step 6) by using a grinding machine, a milling machine or a processing center to obtain the required finished product size.
The production process of the high-temperature resistant ceramic is characterized in that in the step 6), the sintering temperature is 1100-1260 ℃, and the sintering time is 2.5-36 hours.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts specific raw materials and the proportion of the raw materials to manufacture the high-temperature resistant ceramic, the produced ceramic has the main characteristics of high thermal shock resistance, high-temperature resistance, high purity and no pollution to the nickel-based alloy, and can be manufactured into a crucible for smelting the nickel-based alloy.
Detailed Description
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 only a part of the embodiments of the present invention, and not all embodiments.
A production process of high-temperature resistant ceramics comprises the following process steps:
1) preparing raw materials: 29-35 wt% of silicon dioxide (SiO2), 64-71 wt% of aluminum oxide (Al2O3), 0.17-0.22 wt% of titanium dioxide (TiO2) or less, 0.12-0.23 wt% of sodium oxide (Na2O) or less, 0.02-0.12 wt% of ferric oxide (Fe2O3) or less, 0.01-0.14 wt% of magnesium oxide (MgO) or less, and 0.02-0.08 wt% of potassium oxide (K2O);
2) milling: the powder of the raw material in the step 1) has better particle morphology and bulk density through a powder grinding device;
3) pulping: the raw material pulverized in the step 2) has good forming performances such as fluidity, viscosity and the like through pulping equipment;
4) pouring and forming: pouring the slurry prepared in the step 3) into a mold, curing the slurry in the mold, and demolding to form a biscuit;
5) and (3) drying: fully drying the biscuit in the step 4) through a drying furnace to ensure that the biscuit has primary strength so as to prepare for sintering of the next procedure;
6) and (3) sintering: sintering the biscuit dried in the step 5) to form a ceramic product, wherein the sintering temperature is 1100-1260 ℃, and the sintering time is 2.5-36 hours;
7) and (3) machining: and (3) processing the ceramic product sintered in the step 6) by using a grinding machine, a milling machine or a processing center to obtain the required finished product size.
The ceramic processed by the production process has the following functional characteristics: a breaking strength (room temperature) of 5.8 to 9.7N/mm2, an apparent porosity of 26.4 to 31.0%, a bulk density of 2.16 to 2.31g/cm3, and an apparent specific gravity of 3.06 to 3.22.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (2)

1. The production process of the high-temperature resistant ceramic is characterized by comprising the following steps:
1) preparing raw materials: 29-35 wt% of silicon dioxide (SiO2), 64-71 wt% of aluminum oxide (Al2O3), 0.17-0.22 wt% of titanium dioxide (TiO2) or less, 0.12-0.23 wt% of sodium oxide (Na2O) or less, 0.02-0.12 wt% of ferric oxide (Fe2O3) or less, 0.01-0.14 wt% of magnesium oxide (MgO) or less, and 0.02-0.08 wt% of potassium oxide (K2O);
2) milling: the powder of the raw material in the step 1) has better particle morphology and bulk density through a powder grinding device;
3) pulping: the raw material pulverized in the step 2) has good forming performances such as fluidity, viscosity and the like through pulping equipment;
4) pouring and forming: pouring the slurry prepared in the step 3) into a mold, curing the slurry in the mold, and demolding to form a biscuit;
5) and (3) drying: fully drying the biscuit in the step 4) through a drying furnace to ensure that the biscuit has primary strength so as to prepare for sintering of the next procedure;
6) and (3) sintering: sintering the biscuit dried in the step 5) to form a ceramic product;
7) and (3) machining: and (3) processing the ceramic product sintered in the step 6) by using a grinding machine, a milling machine or a processing center to obtain the required finished product size.
2. The production process of the high-temperature-resistant ceramic according to claim 1, wherein the sintering temperature in the step 6) is 1100-1260 ℃, and the sintering time is 2.5-36 h.
CN202111682400.1A 2021-12-30 2021-12-30 Production process of high-temperature-resistant ceramic Pending CN114409416A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02275753A (en) * 1985-01-18 1990-11-09 Ngk Insulators Ltd High strength feldspathic porcelain
CN1472164A (en) * 2003-07-09 2004-02-04 山东硅苑新材料科技股份有限公司 Low-temperature sintered complex phase abrasion resistant ceramic material
JP2006044981A (en) * 2004-08-04 2006-02-16 Sosenji Ceramic
CN1743293A (en) * 2004-09-01 2006-03-08 吕云南 Ceramic inspection well cover and its preparing method
CN105859328A (en) * 2016-03-31 2016-08-17 谢敬裕 Self-glazed ceramic-molded clay body blocking agent and method
CN109400137A (en) * 2018-12-12 2019-03-01 怀化学院 Anode material of lithium battery firing fire-clay crucible and preparation method thereof
CN112279636A (en) * 2020-11-16 2021-01-29 江西博鑫精陶环保科技有限公司 Preparation method of ceramic compact honeycomb ceramic heat accumulator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02275753A (en) * 1985-01-18 1990-11-09 Ngk Insulators Ltd High strength feldspathic porcelain
CN1472164A (en) * 2003-07-09 2004-02-04 山东硅苑新材料科技股份有限公司 Low-temperature sintered complex phase abrasion resistant ceramic material
JP2006044981A (en) * 2004-08-04 2006-02-16 Sosenji Ceramic
CN1743293A (en) * 2004-09-01 2006-03-08 吕云南 Ceramic inspection well cover and its preparing method
CN105859328A (en) * 2016-03-31 2016-08-17 谢敬裕 Self-glazed ceramic-molded clay body blocking agent and method
CN109400137A (en) * 2018-12-12 2019-03-01 怀化学院 Anode material of lithium battery firing fire-clay crucible and preparation method thereof
CN112279636A (en) * 2020-11-16 2021-01-29 江西博鑫精陶环保科技有限公司 Preparation method of ceramic compact honeycomb ceramic heat accumulator

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