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Three-dimensional reticulated spinel-cordierite porous ceramic with high porosity and preparation method thereof

A technology of three-dimensional network and porous ceramics, which is applied in the direction of ceramic products, ceramic material production, clay products, etc., can solve the problems of difficult control of porosity, low porosity, difficult to control shrinkage, etc., to increase porosity and reduce sintering temperature , the effect of improving the utilization rate

Active Publication Date: 2019-11-08
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, improving the porosity of porous ceramics mainly lies in the method of composite foaming. Patent CN106146023A uses biomass raw materials rice husk and straw as pore-forming agents, and adds ferric oxide, calcium carbonate, and carbon powder as foaming agents to prepare foams. Ceramic wall, but it adopts high temperature foaming method, which will inevitably lead to difficult control of porosity and low porosity
Patent CN109761592A uses organic foam impregnation method and composite foaming of one or more of rice husk, inorganic carbon, polystyrene, and starch to prepare foamed ceramics. Since the average particle size of the pore-forming agent is less than 10 μm, it is difficult to control during the sintering process. shrinkage

Method used

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  • Three-dimensional reticulated spinel-cordierite porous ceramic with high porosity and preparation method thereof
  • Three-dimensional reticulated spinel-cordierite porous ceramic with high porosity and preparation method thereof
  • Three-dimensional reticulated spinel-cordierite porous ceramic with high porosity and preparation method thereof

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Effect test

Embodiment 1

[0031] The high porosity three-dimensional reticular spinel-cordierite porous ceramic components, contents and functions of this embodiment are shown in Table 1 below, and the raw materials in the table are all calculated by weight percentage; wherein the particle size of nickel metallurgical waste slag is more than or equal to 200 mesh, nickel alloy MgSiO in waste residue 3 and Mg 2 SiO 4 The sum of the percentages by weight ≥ 85%; the fly ash is secondary fly ash with a fineness ≥ 350 mesh; the fineness of waste glass powder ≥ 350 mesh, and the Na in waste glass powder 2 The weight percentage of O is more than or equal to 20%.

[0032] Component, content and effect of table 1 embodiment 1 porous ceramics

[0033]

[0034]

[0035] The preparation method of the high-porosity three-dimensional network spinel-cordierite porous ceramic in this embodiment is divided into two parts: precursor preparation and ceramic green body sintering, including the following steps:

...

Embodiment 2

[0043]The high porosity three-dimensional reticulated spinel-cordierite porous ceramic components, contents and functions of this embodiment are shown in Table 2 below, and the raw materials in the table are all calculated by weight percentage; wherein, wherein the nickel metallurgical waste slag particle size is ≥ 200 mesh, MgSiO in nickel alloy waste slag 3 and Mg 2 SiO 4 The sum of the percentages by weight ≥ 85%; the fly ash is secondary fly ash with a fineness ≥ 350 mesh; the fineness of waste glass powder ≥ 350 mesh, and the Na in waste glass powder 2 The weight percentage of O is more than or equal to 20%.

[0044] Component, content and effect of table 2 embodiment 2 porous ceramics

[0045]

[0046]

[0047] The preparation method of the high-porosity three-dimensional network spinel-cordierite porous ceramic in this embodiment is divided into two parts: precursor preparation and ceramic green body sintering, including the following steps:

[0048] (1) Spong...

Embodiment 3

[0054] The high-porosity three-dimensional reticular spinel-cordierite porous ceramic components, contents and functions of this embodiment are shown in Table 3 below, and the raw materials in the table are all calculated by weight percentage; wherein, the nickel metallurgical waste slag has a particle size of ≥200 mesh, MgSiO in nickel alloy waste slag 3 and Mg 2 SiO 4 The sum of the percentages by weight ≥ 85%; the fly ash is secondary fly ash with a fineness ≥ 350 mesh; the fineness of waste glass powder ≥ 350 mesh, and the Na in waste glass powder 2 The weight percentage of O is more than or equal to 20%.

[0055] Component, content and effect of the porous ceramic of table 3 embodiment 3

[0056]

[0057] The preparation method of the high-porosity three-dimensional network spinel-cordierite porous ceramic in this embodiment is divided into two parts: precursor preparation and ceramic green body sintering, including the following steps:

[0058] (1) Sponge template...

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Abstract

The invention discloses three-dimensional reticulated spinel-cordierite porous ceramic with high porosity and a preparation method thereof. Raw materials comprise a polyurethane sponge template, a foam ceramic raw material and a foam body; and the foam ceramic raw material comprises the following components in percentage by weight: 10-20% of nickel metallurgical waste residues, 7-17% of fly ash, 5-10% of kaolin, 8-13% of alumina, 5-10% of waste glass powder, 0.5-2% of carboxymethyl cellulose, 0.5-2% of polyacrylic acid amine and 36-40% of water; and the foam body comprises the following components in percentage by weight: 1-2% of a foaming agent, 0.5-1% of a foam stabilizer and the balance of water. According to the invention, the three-dimensional reticulated spinel-cordierite porous ceramic with high porosity is prepared by a compound pore forming method by using the foaming agent and an organic foam impregnation method, so that compound pore forming is carried out on an existing three-dimensional reticulated structure by using the foaming agent to obtain a porous structure with small and uniform pore diameters, and porosity of the porous ceramic is improved.

Description

technical field [0001] The invention relates to high porosity ceramics and a preparation method thereof, in particular to a high porosity three-dimensional mesh spinel-cordierite porous ceramic and a preparation method thereof. Background technique [0002] Porous ceramic is a ceramic product with a three-dimensional network structure. It not only has the high temperature resistance and corrosion resistance of traditional ceramics, but also has the characteristics of low density, light weight, high porosity and small thermal conductivity due to its unique pore structure. . Due to their unique properties, porous ceramics have been widely used in architecture, biomedicine, electrochemistry, etc. [0003] There are many preparation techniques for porous ceramics, such as the foaming method. In general, the gas is generated during the sample preparation process through a chemical reaction to cause foaming. In addition, there are sol-gel methods, adding pore-forming agents, org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/135C04B33/138C04B33/132C04B33/32C04B38/06C04B38/10
CPCC04B33/13C04B33/1352C04B33/138C04B33/32C04B38/0615C04B38/10C04B2235/3206C04B2235/3217C04B2235/3222C04B2235/3481C04B2235/36C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607C04B38/0067C04B38/0074Y02P40/60
Inventor 吴其胜陈秋静黄子宸诸华军杨涛朱宝贵顾斌
Owner YANCHENG INST OF TECH
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