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Vibrating film and its preparation method and application

A vibrating membrane and metal technology, applied in the field of loudspeakers, can solve the problems of narrow frequency response range, affecting the pronunciation effect, lack of high-frequency vibrating membrane, etc.

Active Publication Date: 2017-12-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional titanium vibrating membrane has a narrow frequency response range and low sensitivity, and it is prone to split vibration at high frequencies, which seriously affects its pronunciation effect
[0004] In summary, in the prior art, there is still a lack of satisfactory high-frequency vibrating membranes with wide frequency response range and high sensitivity. Therefore, there is an urgent need in this field to develop high-frequency vibrating membranes that can meet the requirements of treble and high frequencies.

Method used

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  • Vibrating film and its preparation method and application
  • Vibrating film and its preparation method and application
  • Vibrating film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0087] Preparation method of vibrating membrane

[0088] The invention also provides a preparation method of the vibrating film of the invention. Typically, this method includes:

[0089] Provide metal substrate;

[0090] Generating a metal oxide layer on at least one main surface of the metal substrate to obtain the vibrating film, specifically, a preferred method for preparing the vibrating film, comprising the following steps:

[0091] Carry out surface pretreatment on the metal substrate, successively carry out degreasing and derusting activation treatment in alkaline washing solution and pickling solution, then use ultrasonic cleaning in acetone solution, take it out and air dry;

[0092] An aqueous electrolyte solution containing fluoride ions is configured for anodic oxidation treatment;

[0093] In the aqueous electrolyte solution containing fluoride ions, the metal substrate is used as an anode, and the metal substrate is subjected to anodic oxidation treatment, th...

Embodiment 1

[0111] Diaphragm No.1

[0112] Next, the vibrating membrane is prepared with pure titanium as the metal substrate, including the following steps:

[0113] (1) Perform surface pretreatment on the pure titanium metal base material, successively wash in 5-20wt.% sodium hydroxide aqueous solution for 2-10 minutes, and the temperature of the sodium hydroxide washing solution is 40-150°C. After cleaning the metal substrate with clean water, put it into the pickling solution for cleaning for 2-10 minutes. The proportion of the pickling solution is hydrofluoric acid (10ml) + nitric acid (40ml) + deionized water (300ml). The acid-washed vibrating membrane was then ultrasonically cleaned in acetone solution, removed and air-dried.

[0114] (2) Prepare a 3wt.% phosphoric acid electrolyte aqueous solution for electrochemical anodic oxidation.

[0115] (3) Perform anodic oxidation treatment on the pure titanium metal substrate in an aqueous electrolyte solution, and the counter electrode...

Embodiment 2

[0119] Diaphragm No.2

[0120] Next, the vibrating membrane is prepared with pure titanium as the metal substrate, including the following steps:

[0121] (1) Perform surface pretreatment on the pure titanium metal base material, first wash in 5-20wt.% sodium hydroxide aqueous solution for 2-10 minutes, and the temperature of the alkaline washing solution is 40-150°C. After washing with water, put it into the pickling solution for 2-10 minutes. The proportion of the pickling solution is hydrofluoric acid (10ml) + nitric acid (40ml) + deionized water (300ml). The pure titanium metal substrate after pickling is then ultrasonically cleaned in acetone solution, taken out and air-dried.

[0122] (2) Configure the fluoride electrolyte for electrochemical anodic oxidation, NH in the electrolyte 4 The content of F is 0.25wt.%, the content of deionized water is 2wt.%, and the rest is ethylene glycol.

[0123](3) Perform anodic oxidation treatment on the pure titanium vibrating diaph...

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Abstract

The invention provides a vibrating membrane for a loudspeaker, its preparation method and application. Specifically, the present invention provides a vibrating membrane comprising a metal substrate and a metal oxide layer on at least one major surface of the substrate, wherein the metal oxide layer has one or more audio-improving and / or Or the following characteristics of sound quality: (i) the metal oxide layer has a nanotube array structure; (ii) the hardness and / or elastic modulus of the metal oxide layer are greater than the hardness and / or elasticity of the metal substrate modulus. An oxide layer is directly formed on the surface of the metal substrate through anodic oxidation treatment technology, which can effectively improve the hardness and elastic modulus of the vibrating film, and improve the audio and sound quality of the vibrating film.

Description

technical field [0001] The invention relates to the field of loudspeakers, in particular to a vibrating membrane, its preparation method and application. Background technique [0002] With the development of modern audio equipment technology, there are higher and higher requirements for the high-frequency diaphragm of the playback system. Traditional loudspeaker diaphragms are mostly made of organic plastic materials or their composite materials. However, the pronunciation effect of these materials is not satisfactory, especially in high-pitched and high-frequency sounds, and the sound quality is difficult to meet the application requirements. [0003] At present, in the field of high-pitched and high-frequency pronunciation, titanium and its alloy materials are mostly used to prepare vibrating membranes. Titanium and its alloys have good corrosion resistance and mechanical properties, and are ideal metal materials for high-end vibrating membranes. However, the traditional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R7/02H04R31/00
Inventor 李金龙王永欣王立平薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI