Sound-absorbing material particle and preparation method thereof

Patent metadata

Field	Value
Publication number	US-10633295-B2
Application number	US-201615781268-A
Country	US
Kind code	B2
Filing date	May 18, 2016
Priority date	Dec 3, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

The invention discloses a sound-absorbing material particle and a preparation method thereof. The preparation method comprises the following steps: step 1, mixing a sound-absorbing raw material with a templating agent and water to prepare a sound-absorbing slurry, filling a reaction kettle with a porous ceramic substrate and the sound-absorbing slurry that are mixed together; step 2, performing hydrothermal crystallization in the reaction kettle to ensure that the sound-absorbing raw material is crystallized on the porous ceramic substrate and constitutes the sound-absorbing material particle together with the porous ceramic substrate; step 3, performing solid-liquid separation on the materials in the reaction kettle; and step 4, drying and roasting the sound-absorbing material particle.

First claim

What is claimed is:

1. A preparation method of a sound-absorbing material particle, comprising:
mixing a sound-absorbing raw material with an organic templating agent and water to prepare a sound-absorbing slurry, the organic templating agent being an organic impurity relative to the sound-absorbing raw material;
filling a reaction kettle with a porous ceramic substrate and the sound-absorbing slurry that are mixed together;
performing hydrothermal crystallization in the reaction kettle to ensure that the sound-absorbing raw material is crystallized on the porous ceramic substrate and constitutes the sound-absorbing material particle together with the porous ceramic substrate;
performing solid-liquid separation on materials in the reaction kettle; and
drying and roasting the sound-absorbing material particle.

2. The preparation method according to claim 1 , wherein the porous ceramic substrate is a honeycomb ceramic particle or a porous ceramic microsphere, of which a particle size is 0.05-1.0 mm.

3. The preparation method according to claim 1 , wherein a purity of a material that makes up the organic templating agent is more than 95%, and an addition of the organic templating agent accounts for 1-20% of a total mass of the sound-absorbing slurry.

4. The preparation method according to claim 1 , wherein a roasting temperature is 120-850° C., and a roasting time is 0.5-96 h.

5. The preparation method according to claim 4 , wherein a temperature rise rate of roasting is 20-120° C./h.

6. The preparation method according to claim 1 , wherein a content of oxygen in a furnace gas atmosphere during roasting is 0.1-21%.

7. The preparation method according to claim 1 , wherein the reaction kettle is made of 316L stainless steel.

Assignees

• Goertek Inc

Inventors

• Cao Xiaodong

Classifications

• G10K11/162

  Selection of materials · CPC title

• C04B41/009

  characterised by the material treated · CPC title

• C04B41/85

  with inorganic materials · CPC title

• C04B38/0012 Primary

  characterised by the material used for sealing or plugging (some of) the channels of the honeycombs · CPC title

• C04B2111/52

  Sound-insulating materials · CPC title