Sound-absorbing material particle and preparation method thereof

Patent metadata

Field	Value
Publication number	US-2019062170-A1
Application number	US-201616073640-A
Country	US
Kind code	A1
Filing date	May 18, 2016
Priority date	Jan 28, 2016
Publication date	Feb 28, 2019
Grant date	—

Abstract

The invention discloses a sound-absorbing material particle and a preparation method thereof. The method for preparing the sound-absorbing material particle comprises: mixing a sound-absorbing raw material with a solvent to form a sound-absorbing slurry; filling the sound-absorbing slurry into a mechanical compression die, and performing compression molding on the sound-absorbing slurry to form a particle; performing a hydrothermal crystallization reaction on the particle to crystallize the sound-absorbing raw material in the particle; and drying the particle to produce the sound-absorbing material particle.

First claim

1 . A method for preparing a sound-absorbing material particle, comprising:
mixing a sound-absorbing raw material with a solvent to make a sound-absorbing slurry; filling the sound-absorbing slurry into a mechanical compression die, and performing compression molding on the sound-absorbing slurry to form a particle; performing a hydrothermal crystallization reaction on the particle to crystallize the sound-absorbing raw material in the particle; and drying the particle to produce the sound-absorbing material particle.

2 . The method according to claim 1 , wherein the mass ratio of the sound-absorbing raw material in the sound-absorbing slurry ranges from 35% to 75%.

3 . The method according to claim 1 , wherein the particle has a diameter in the range of 0.05-1.0 mm.

4 . The method according to claim 1 , wherein the hydrothermal crystallization reaction is performed in a hydrothermal device, wherein the hydrothermal device has a reactant, and the reactant comprises a template agent.

5 . The method according to claim 1 , wherein the purity of the template agent is greater than 95%, and the mass ratio of the template agent in the reactant ranges from 1% to 35%.

6 . The method according to claim 1 , wherein the drying process is performed at a temperature in the range of 40° C. to 150° C., and the atmosphere for the drying process includes nitrogen gas.

7 . The method according to claim 1 , wherein the sound-absorbing material particle or the particle is subjected to a roasting process, wherein the roasting process is performed at a temperature in the range of 120° C. to 850° C., the heating rate of the roasting ranges from 20° C./h to 120° C./h, and the time range for the roasting is 0.5-96 h.

8 . The method according to claim 1 , wherein the content of oxygen in the atmosphere of the furnace gas for a roasting process is 0.1%-21%.

9 . A sound-absorbing material particle, wherein the sound-absorbing material particle has a particle size in the range of 0.05-1.0 mm, a specific surface area in the range of 250-850 m 2 /g, a pore volume in the range of 0.2-2.0 ml/g, and a bulk density in the range of 0.25-0.95 g/ml.

10 . The sound-absorbing material particle according to claim 9 , wherein the volume of micropore pores having a pore size of 0.5 μm to 45 μm in the sound-absorbing material particle accounts for 10% to 85% of the total pore volume of the sound-absorbing material particle.

Assignees

• Goertek Inc

Inventors

• Cao Xiaodong

Classifications

• G10K11/162

  Selection of materials · CPC title

• C01P2006/12

  Surface area · CPC title

• C01B39/02 Primary

  Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof · CPC title

• C01P2006/11

  Powder tap density · CPC title

• B01J2/22

  by pressing in moulds or between rollers · CPC title