Wide temperature range type high-temperature lead-free ceramic capacitor material and preparation method

A technology of ceramic capacitors and lead-free ceramics, applied in capacitors, fixed capacitors, fixed capacitor dielectrics, etc., can solve problems such as poor temperature stability, large lead pollution, environmental and human hazards, etc., to reduce dielectric loss and improve dielectric Constant, environmentally friendly effect
CN108484167AInactive Publication Date: 2018-09-04GUILIN UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUILIN UNIVERSITY OF TECHNOLOGY
Publication Date
2018-09-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a wide temperature range type high-temperature lead-free ceramic capacitor material and a preparation method. The ceramic comprises 0.92(K0.5NaO.5) NbO3-(0.92-x)LiNbO3-xSrTiO3-y(Bi0.5Li0.5)ZrO3-zCuO, wherein x ranges from 0.02 to 0.05; y ranges from 0.02 to 0.08; z ranges from 0.02 to 0.05. The high-temperature lead-free ceramic capacitor material is prepared by a sol-gel technology; the temperature stability in a high temperature range is high; the dielectric constant is high and the loss is low in the wide high temperature range; and the material meets different application demands under high temperature environments.
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Description

technical field

[0001] The invention belongs to the field of electronic information materials, and in particular relates to a high-temperature potassium sodium niobate-based lead-free ceramic capacitor material with a wide temperature range and a preparation method thereof. Background technique

[0002] Traditional X7R, X8R, and X9R capacitors are rated at 125°C, 150°C, and 175°C, respectively. These types of capacitors are widely used in electronic circuit systems. With the development of technology, higher requirements are put forward for the use temperature of capacitors. For example, capacitors used in the circuit system of hybrid or electric drive vehicles, aerospace and oil drilling platforms need to be used at temperatures above 200°C. Ideal high-temperature ceramic capacitors have a high dielectric constant (ε r ), wide temperature stability range (generally ±15% dielectric constant change) and low dielectric loss (tanδ). High ε r It is conducive to the miniaturiz...

Claims

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