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Method for preparing high-sound-absorptivity porous silicate material by molding and sintering inorganic salt

A technology of inorganic salts and silicates, which is used in the preparation of porous silicate materials with high sound absorption properties by inorganic salt mold sintering. Connectivity is not easy to achieve and other problems, to achieve the effect of good sound absorption performance

Inactive Publication Date: 2013-11-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current problems in the preparation of foam glass materials are that the foaming process is not easy to control, the porosity, pore size and shape of the pores are difficult to control, and the connection between pores is not easy to realize, that is, the structure of the porous glass material cannot be controlled, which limits its use in Applications in sound absorption

Method used

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  • Method for preparing high-sound-absorptivity porous silicate material by molding and sintering inorganic salt
  • Method for preparing high-sound-absorptivity porous silicate material by molding and sintering inorganic salt
  • Method for preparing high-sound-absorptivity porous silicate material by molding and sintering inorganic salt

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Embodiment 1

[0021] Example 1: Method for preparing porous silicate materials with a porosity of 53% and an average pore diameter of 0.3mm

[0022] Refer to figure 1 The porous glass material in this embodiment is made by sintering ordinary silicate glass powder; the material sample is a cylindrical sintered glass material with a diameter of 29 mm, a thickness of 20 mm, and a porosity of 53%. The average pore size and pore morphology of porous glass are formed by sodium sulfate particles.

[0023] The method for preparing the porous glass material in this embodiment is characterized in that it comprises the following steps:

[0024] Step 1: Select ordinary glass and grind it into powder. The average particle size of the glass powder is less than 200 mesh and the mass is 15.4g;

[0025] Step 2: Select an inorganic salt with a melting point higher than the softening point of the glass. In this embodiment, the average particle size is 0.3mm and the mass is 8.4g sodium sulfate particles;

[0026] Step ...

Embodiment 2

[0029] Example 2: Method for preparing porous silicate materials with a porosity of 76% and an average pore size of 0.4mm (change the corresponding parameters in this example)

[0030] Refer to figure 1 The porous glass material in this embodiment is sintered from ordinary silicate glass powder; the material sample is a cylindrical sintered glass material with a diameter of 29mm, a thickness of 20mm, and a porosity of 76%. The average pore size and pore morphology of porous glass are formed by sodium sulfate particles.

[0031] The method for preparing the porous glass material in this embodiment is characterized in that it comprises the following steps:

[0032] Step 1: Select ordinary glass and grind it into powder. The average particle size of the glass powder is less than 300 mesh and the mass is 7.9g;

[0033] Step 2: Select an inorganic salt with a melting point higher than the softening point of the glass. In this embodiment, the average particle size is 0.4mm and the mass is 1...

Embodiment 3

[0039] Example 3: Refer to figure 2 The porous glass material in this embodiment is made by sintering glass powder; the material is a diameter of 29mm and a thickness of 20mm. The porosity of part A is 52% and the porosity of part B is 75%. The whole is cylindrical. .

[0040] The method for preparing the porous glass material in this embodiment is characterized in that it comprises the following steps:

[0041] Step 1: Pre-forming of part A. Choose glass powder with an average particle size of less than 200 meshes and a mass of 6.3g and 0.1g boric acid; choose an average particle size of 0.3mm and a mass of 3.4g sodium sulfate particles, mix the above-mentioned selected materials uniformly, and load them with a diameter of 29mm In the mold, pre-pressed into a primary sample with a thickness of 8mm;

[0042] Step 2: Part B preparation of materials.

[0043] Choose glass powder with an average particle size of less than 200 mesh and a mass of 4.9g and 0.2g boric acid; choose an aver...

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Abstract

The invention discloses a method for preparing a high-sound-absorptivity porous silicate material by molding and sintering inorganic salt and belongs to the field of inorganic materials. According to the method, the porous glass material is prepared in such a manner that inorganic salt is mixed with glass power, the mixture is pressed and sintered, and the inorganic salt is dissolved out. The method is characterized in that porosity, pore sizes, pore forms and the connectivity among pores are controllable. The method has the benefits as follows: porosity, pore sizes, pore forms and connectivity among pores can be controlled as required; the porous glass material with excellent sound absorption property is obtained. The validity of the method is further validated through a number of examples.

Description

Technical field: [0001] The invention relates to a porous silicate method, in particular to a method for preparing a porous silicate material with high sound absorption performance by sintering with an inorganic salt mold method, and belongs to the field of inorganic materials. Background technique: [0002] Porous silicate materials generally refer to silicate materials with a large number of pores, such as commonly used foam glass and glass wool. It not only has the characteristics of flame retardancy, corrosion resistance, and aging resistance, but also has good sound absorption properties and is widely used. [0003] The typical preparation method of foam glass is to foam the mixture of glass powder, foaming agent and additives at high temperature to form a porous material filled with tiny pores; another typical method is to form a molten glass and then cool and solidify after being filled with gas. Of porous materials. The porous glass prepared by these methods accounts for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C11/00
Inventor 徐颖邹伟仁王常力罗璐
Owner NORTHWESTERN POLYTECHNICAL UNIV
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