Ceramic electronic element

A technology of electronic parts and ceramics, which is applied in the field of ceramic electronic capacitors and can solve the problem of high heating temperature of ceramic bodies

Inactive Publication Date: 2002-10-23
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, ceramic electronic parts used in medium and high voltage regions, especially ceramic capacitors used in medium and high voltage regions, are formed with existing conductive pastes containing lead and lead-containing conductive pastes used to form terminal electrodes. Compared with the same ceramic electronic parts as the terminal electrodes, there is a problem that the heating temperature of the ceramic body is high

Method used

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  • Ceramic electronic element
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Embodiment

[0025] Next, as a conductive component, 33% by volume of Ag powder with a particle size of 0.1 to 5 microns, 6% by volume of glass powder of samples 1 to 9, and 61% by volume of excipients were mixed, and ground with a three-roll mill. After grinding, the conductive pastes of samples 1-9 were obtained. As the excipient, a solution prepared at a ratio of 80% by weight of terpineol and 20% by weight of ethylcellulose was used.

[0026] Next, screen-print the conductive pastes of samples 1 to 9 with a 3mm diameter template on both main surfaces of a ceramic body made of barium titanate with a target capacitance of 1nF, and heat it in air at 800°C for 2 hours. The condition of sintering to form the terminal electrodes, and 200 test samples of samples 1 to 9 were produced respectively.

[0027] Here, the penetration depth of the glass from the surface of the ceramic body was measured for each of 100 samples of test samples 1 to 9, and the measurement results are summarized ...

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Abstract

PURPOSE: A ceramic electronic component is provided to improve an adherence strength and a humidity resistance and to suppress an abnormal heat generation in the ceramic element body. CONSTITUTION: A ceramic electronic component(1) has a ceramic element body(2) and a terminal electrode(3) formed on the ceramic element body(2) using a conductive paste. The conductive paste contains a conductive constituent, glass powder, and an organic vehicle. The glass powder contains crystallization glass. The crystallization glass is an oxide made of B, Bi, and Al constituents, alkaline earth metal, and inevitable impurities. At least one portion of the glass powder is fused for penetrating inside the ceramic element body(2), when the terminal electrode(3) is to be baked for forming, and the depth in the penetration is set to be within 150 micrometer from the surface of the ceramic element body(2).

Description

technical field [0001] The invention relates to ceramic electronic parts used in the middle and high voltage areas, in particular to ceramic electronic capacitors used in the middle and high voltage areas. Background technique [0002] Conventionally, ceramic electronic parts have a ceramic body formed of ceramic materials such as dielectrics, semiconductors, and piezoelectric bodies. As a material constituting electrodes and wiring attached to these ceramic electronic components, conductive paste is often used. [0003] Glass powder is sometimes added to the conductive paste used to form the electrodes of ceramic electronic parts. The effect of adding glass powder to the conductive paste is that it usually softens and flows the electrodes during sintering, thereby promoting the sintering of the conductive components; improving the connection strength of the terminal electrodes; using glass to cover the ceramic body can improve moisture resistance; and In ceramic electronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/12C09D5/24C09J9/02H01B1/22H01G4/008
CPCH01G2/14H01G4/12
Inventor 三木武
Owner MURATA MFG CO LTD
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