Preparation method of ceramic capacitor dielectric with high dielectric constant and ultra-wide working temperature

A technology with ultra-wide working temperature and high dielectric constant, applied in the field of ceramic compositions, can solve the problems of high working temperature environment mismatch, restricting the application of electronic equipment, etc., and achieve good application prospects, ultra-high working temperature range, and low sintering temperature. Effect

Inactive Publication Date: 2014-06-18
TIANJIN UNIV
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Problems solved by technology

For example, the anti-lock braking system in automotive electronics needs to work in the temperature range of 150°C to 250°C, and the sensor in the cylinder works at 200°C to 300°C. The X9R material with the highest working temperature limit among the wide temperature stable dielectric devices currently under study , and its upper limit working temperature only reaches 200°C, which does not match the high working temperature environment, which limits the application of electronic equipment

Method used

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  • Preparation method of ceramic capacitor dielectric with high dielectric constant and ultra-wide working temperature
  • Preparation method of ceramic capacitor dielectric with high dielectric constant and ultra-wide working temperature
  • Preparation method of ceramic capacitor dielectric with high dielectric constant and ultra-wide working temperature

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Embodiment Construction

[0014] The raw materials used in the present invention are commercially available analytical reagents.

[0015] Na first 2 CO 3 、 Bi 2 o 3 、TiO 2 According to the mass ratio of 3:15:10, mixed with deionized water, ball milled for 6 hours, dried and calcined at 800°C to obtain Na 0.5 Bi 0.5 TiO 3 powder; press Na again 0.5 Bi 0.5 TiO 3 Powder and BaTiO 3 and Nb 2 o 5 The mass ratio is 1:3.0~7.0:0.1~0.15, mixed with deionized water and ball milled for 2~8 hours, dried and calcined at 750~1000℃ to obtain frit;

[0016] Bi 2 o 3 , Pb 3 o 4 , ZnO, H 3 BO 3 According to the mass percentage of 5:4:8:3, it is mixed with alcohol and ball milled for 10 hours, dried, melted and quenched, ground and sieved to obtain glass powder;

[0017] Then put the frit into 100g, add 1~10g ZnO, 8g glass powder, and 0.1~0.8g CeO 2 Ingredients; then mix the raw materials with deionized water and ball mill for 2-8 hours and dry;

[0018] Then add paraffin wax with a mass percentage o...

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Abstract

The invention discloses a preparation method of a ceramic capacitor dielectric with a high dielectric constant and an ultra-wide working temperature. The preparation method comprises the steps: blending Na2CO3, Bi2O3 and TiO2 according to a weight ratio of 3:15:10 to prepare Na0.5Bi0.5TiO3 powder, then blending with BaTiO3 and Nb2O5 according to a weight ratio of 1:(3.0-7.0):(0.1-0.15), calcining at a temperature of 750-1000 DEG C to prepare a melt; and adding 1-10 percent by weight of ZnO, 8 percent by weight of glass powder and 0.1-0.8 percent by weight of CeO2 except for the melt for performing secondary blending, pelletizing, forming and de-waxing, and then sintering at a temperature of 1100-1150 DEG C. A ceramic capacitor dielectric material is high in dielectric constant, low in dielectric loss, low in sintering temperature, ultra-wide in working temperature range, low in raw material cost, and better in application prospect, and does not contain a toxic material.

Description

technical field [0001] The invention relates to a ceramic composition characterized by components, in particular to a barium titanate-based ceramic capacitor medium with high dielectric constant and ultra-wide operating temperature range and a preparation method thereof. Background technique [0002] With the increasing requirements of electronic components to meet harsh environmental conditions, the upper limit operating temperature requirements of wide-temperature stable dielectric materials continue to increase. For example, the anti-lock braking system in automotive electronics needs to work in the temperature range of 150°C to 250°C, and the sensor in the cylinder works at 200°C to 300°C. The X9R material with the highest working temperature limit among the wide temperature stable dielectric devices currently under study , and its upper limit operating temperature only reaches 200°C, which does not match the high operating temperature environment, which limits the appli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622C04B41/88
Inventor 李玲霞张宁陈俊晓柳亚然于经洋
Owner TIANJIN UNIV
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