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Ceramic ultrafine powder tape casting ultrathin dielectric paste and ceramic film formed by ceramic ultrafine powder tape casting ultrathin dielectric paste

A technology of ultra-fine powder and dielectric slurry, which is applied in the fields of fixed capacitor dielectric, fixed capacitor parts, and capacitor manufacturing. , to achieve the effect of good peeling degree, smooth surface and stable strength

Active Publication Date: 2021-08-27
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are only a handful of MLCC manufacturers in China that can cast films of 2 μm and below. Even if they can cast films of 2 μm and below, the quality of the films is relatively poor, and the number of defects is very large, which leads to the failure of MLCC. The rate will be very high, which cannot meet the requirements for the preparation of multilayer ceramic capacitors

Method used

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  • Ceramic ultrafine powder tape casting ultrathin dielectric paste and ceramic film formed by ceramic ultrafine powder tape casting ultrathin dielectric paste
  • Ceramic ultrafine powder tape casting ultrathin dielectric paste and ceramic film formed by ceramic ultrafine powder tape casting ultrathin dielectric paste
  • Ceramic ultrafine powder tape casting ultrathin dielectric paste and ceramic film formed by ceramic ultrafine powder tape casting ultrathin dielectric paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The ceramic ultrafine powder casting ultra-thin medium slurry described in this embodiment, based on 100 parts of the total weight of the slurry, includes the following components:

[0047]

[0048]

[0049] The preparation method of ceramic ultrafine powder casting ultrathin medium slurry described in this embodiment includes the following steps:

[0050] (1) Take the above-mentioned selected amount of porcelain powder, ethanol, ethyl acetate, oleic acid, and dispersant (AKM-0531) to mix, put the mixed slurry into a 10L nylon tank for tank grinding, nylon tank Put 3mm zirconia balls in advance, the volume filling rate of zirconia balls reaches 45%, the pot milling speed is 60Hz, and the pot milling time is 6H;

[0051] (2) Continue to add the selected plasticizer (DOP), defoamer (DC-350CS), binder (BH-3 and BM-2) to the above slurry, and disperse the mixed slurry in this step for 6 hours After sealing the tank body, continue to put the nylon tank on the tank mil...

Embodiment 2-11

[0066] The slurry system of the following examples 2-11 of the present invention is the same as that of example 1, the only difference is that the added content of each functional auxiliary agent is slightly different, and the specific auxiliary agent added amount is shown in the following table 1 respectively. The preparation process of the slurry is the same as in Example 1.

[0067] Table 1 embodiment 2-11 slurry (based on slurry 100g total amount)

[0068]

[0069]

experiment example

[0077] According to the test method of the obtained slurry and the obtained membrane performance (based on the same casting method) in the foregoing embodiment 1, the obtained slurry in the above-mentioned examples 2-11 and comparative examples 1-3 and based on the slurry flow The performance of the stretched diaphragm is detected, the test method and equipment are the same as in Example 1, and the test results are shown in Table 2 below.

[0078] Table 2 performance test results of slurry and diaphragm

[0079]

[0080]

[0081] Visible, the present invention is based on the slurry that barium titanate ultrafine powder forms, and its viscosity performance is very stable, has effectively ensured that the casting performance of slurry makes, and, the ceramic diaphragm obtained through scraper casting process, not only can A thin film with a thickness of less than 2 μm is obtained, and the thickness uniformity and quality of the diaphragm are good, which can meet the perfo...

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Abstract

The invention belongs to the technical field of inorganic materials, particularly relates to barium titanate ceramic ultrafine powder tape casting ultrathin dielectric paste, and further discloses a tape casting method of the barium titanate ceramic ultrafine powder tape casting ultrathin dielectric paste, and a ceramic film and an MLCC device which are formed by tape casting of the barium titanate ceramic ultrafine powder tape casting ultrathin dielectric paste. The ceramic ultrafine powder casting ultrathin dielectric paste is developed based on deep processing of the barium titanate ultrafine powder, a paste system with excellent dispersity and casting stability is formed by selecting proper organic solvent, dispersing agent, surfactant, plasticizer, defoaming agent and adhesive, the paste viscosity is very stable, and the performance requirements of casting high-quality ultra-thin dielectric diaphragms of 2 microns and below and corresponding chip multilayer ceramic capacitors can be met.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a barium titanate ceramic superfine powder casting ultra-thin medium slurry, and further discloses its casting method, and its casting-formed ceramic film and MLCC device. Background technique [0002] MLCC (Multi-layer Ceramic Capacitors) is a chip multilayer ceramic capacitor. It is laminated by ceramic dielectric diaphragms with printed electrodes in a dislocation manner. After a high-temperature sintering, a ceramic chip is formed, and then packaged at both ends of the chip. The upper metal layer forms a monolithic structure, also known as a monolithic capacitor. In recent years, MLCC has gradually become one of the largest and fastest-growing chip components in the world. Relying on the good technical framework of 4G, the fifth generation of mobile communication technology (5G) came into being, and the upgrading of communication technology has put fo...

Claims

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Application Information

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IPC IPC(8): H01G4/12H01G4/30H01G13/00
CPCH01G4/1227H01G4/30H01G13/00
Inventor 张凯宋锡滨徐姗姗王海超刘超
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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