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Ultra-light fully-closed-cell foamed ceramic with compact surface and low-temperature firing method of ultra-light fully-closed-cell foamed ceramic

A closed-cell foam ceramic, dense technology, applied in the field of materials, can solve the problems of low compressive strength, high thermal conductivity, high cost of mass production, achieve high overall strength and surface hardness, reduce the probability of damage, and improve reliability. Effect

Active Publication Date: 2021-07-16
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Summarizing the existing research reports on closed-cell foamed ceramics, the following problems generally exist in the prior art when preparing closed-celled foamed ceramics: (1) The sintering temperature is too high, above 1000°C, resulting in too high a mass production cost; (2) ) The total porosity is not high, resulting in high thermal conductivity and poor thermal insulation effect; (3) There are a small number of openings in some parts, resulting in poor waterproof performance; (4) Some parts have low compressive strength and poor bearing performance, Causes it to be easily damaged during transportation and use

Method used

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  • Ultra-light fully-closed-cell foamed ceramic with compact surface and low-temperature firing method of ultra-light fully-closed-cell foamed ceramic
  • Ultra-light fully-closed-cell foamed ceramic with compact surface and low-temperature firing method of ultra-light fully-closed-cell foamed ceramic
  • Ultra-light fully-closed-cell foamed ceramic with compact surface and low-temperature firing method of ultra-light fully-closed-cell foamed ceramic

Examples

Experimental program
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Embodiment 1

[0050] 1. Preparation of ultra-light fully closed-cell foam ceramics with dense surface:

[0051] The preparation process of the ultra-light fully closed-cell foam ceramics with dense surface in this embodiment is as follows: figure 1 Shown, preparation method comprises the steps:

[0052] (1) add 9g zinc oxide, 7g spodumene, 5g albite, 5g potassium feldspar in every 100g quartz sand, make compound I; Add 15g calcium carbonate, 35g borax in every 100g compound I, The mixture II is prepared; the mixture II is ball-milled by a planetary ball mill to obtain a mixed powder with an average particle size of less than 5 μm.

[0053] (2) Pour the mixed powder obtained in step (1) into a steel mold whose inner wall is covered with aluminum metasilicate felt with a thickness of 1mm; during specific operations, first spread the bottom and four walls of the mold with aluminum metasilicate Felt, then pour the mixed powder, control the filling volume of the mixed powder to account for 45%...

Embodiment 2

[0073] 1. Preparation of ultra-light fully closed-cell foam ceramics with dense surface:

[0074] The preparation process of the ultra-light fully closed-cell foam ceramics with dense surface in this embodiment is as follows: figure 1 Shown, preparation method comprises the steps:

[0075] (1) add 8g zinc oxide, 6g spodumene, 4g albite, 4g potassium feldspar in every 100g quartz sand, make mixture I; Add 20g calcium carbonate, 40g borax in every 100g mixture I, The mixture II is prepared; the mixture II is ball-milled by a planetary ball mill to obtain a mixed powder with an average particle size of less than 5 μm.

[0076] (2) Pour the mixed powder obtained in step (1) into a steel mold whose inner wall is covered with aluminum metasilicate felt with a thickness of 1mm; during specific operations, first spread the bottom and four walls of the mold with aluminum metasilicate Felt, then pour the mixed powder, control the filling volume of the mixed powder to account for 40% o...

Embodiment 3

[0082] 1. Preparation of ultra-light fully closed-cell foam ceramics with dense surface:

[0083] The preparation process of the ultra-light fully closed-cell foam ceramics with dense surface in this embodiment is as follows: figure 1 Shown, preparation method comprises the steps:

[0084] (1) add 10g zinc oxide, 8g spodumene, 6g albite, 6g potassium feldspar in every 100g quartz sand, make compound I; Add 10g calcium carbonate, 30g borax in every 100g compound I, The mixture II is prepared; the mixture II is ball-milled by a planetary ball mill to obtain a mixed powder with an average particle size of less than 5 μm.

[0085] (2) Pour the mixed powder obtained in step (1) into a steel mold whose inner wall is covered with aluminum metasilicate felt with a thickness of 2 mm; during specific operations, first spread the bottom and four walls of the mold with aluminum metasilicate Felt, then pour the mixed powder, control the filling volume of the mixed powder to account for 4...

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Abstract

The invention discloses ultralight fully-closed-cell foamed ceramic with a compact surface. According to the invention, quartz sand is taken as a main material, calcium carbonate is taken as a foaming agent, borax is taken as a fluxing agent and zinc oxide, albite, potassium feldspar and spodumene are taken as conditioning agents; and a sintering temperature is 740 to 800 DEG C. The invention further discloses a low-temperature firing method of the ultralight fully-closed-cell foamed ceramic. The preparation technology disclosed by the invention has the remarkable advantages of simple process, low sintering temperature, short sintering time and the like, so the manufacturing cost of the method is far lower than the manufacturing cost of existing preparation technology. Besides, different from foamed ceramic prepared in the prior art, the interior of the ultralight fully-closed-cell foamed ceramic with the compact surface is of a porous structure, pores are independent from one another and do not communicate with each other, the surface is continuous and compact and free of pores, the heat preservation and sound insulation effects of the foamed ceramic can be remarkably improved, the foamed ceramic has excellent waterproof and moisture-proof performance, and the reliability of a product is obviously improved.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to an ultra-light fully closed-cell foam ceramic with dense surface and a low-temperature firing method thereof. Background technique [0002] Ceramic foam is a ceramic material with high porosity, which is divided into two types: open cell type and closed cell type. The main preparation processes include direct foaming method, high temperature foaming method, adding pore-forming agent method, organic precursor impregnation method, gel injection molding method, self-propagating high-temperature synthesis method, etc. The characteristics of open-cell foam ceramics are that the internal pores are connected to each other, the surface pores are open to the outside, the preparation process is mature, the product performance is stable, and it is widely used. The characteristic of closed-cell foam ceramics is that the internal pores are independent and not connected to each other, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B38/00C04B35/14C04B35/622C04B35/63
CPCC04B38/02C04B38/0025C04B35/14C04B35/622C04B35/6303C04B2235/442C04B2235/3284C04B2235/3472C04B2235/3409
Inventor 李向明
Owner YANTAI UNIV
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