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Positive-temperature-coefficient ceramic dielectric material and preparing method thereof

A positive temperature coefficient, ceramic dielectric technology, applied in the field of ceramic dielectric materials, can solve problems such as increase and decrease in actual capacitance, and achieve the effect of high dielectric constant, positive temperature coefficient, and high dielectric constant

Inactive Publication Date: 2019-07-30
TAIYUAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This temperature rise results in a decrease or increase in the actual capacitance

Method used

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  • Positive-temperature-coefficient ceramic dielectric material and preparing method thereof
  • Positive-temperature-coefficient ceramic dielectric material and preparing method thereof
  • Positive-temperature-coefficient ceramic dielectric material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: A kind of positive temperature coefficient ceramic dielectric material, be 10% Yb by mass percentage 2 o 3 and 90% Na 0.2 Bi 0.6 ZrO 3 composition.

[0017] The method for preparing the positive temperature coefficient ceramic dielectric material, the steps are as follows: the raw material Na 2 CO 3 、 Bi 2 o 3 and ZrO 2 According to the general formula Na 0.2 Bi 0.6 ZrO 3 , for batching, ball milling on a ball mill with a speed of 400r / min for 6 hours, drying in a 3.3kw ordinary oven at 100°C for 4 hours, passing through 250 holes / cm 2 Sieve the sample, raise the temperature to 800°C at 5°C / min, and keep the temperature at 800°C for 3 hours to obtain frit A.

[0018] For secondary batching, according to 90% frit A and 10% Yb 2 o 3 Mix evenly, add 70ml of deionized water, mill on a ball mill at a speed of 400r / min for 8 hours, dry at 120°C for 4 hours, pass through 250 holes / cm 2 Sieve the sample, add 8wt% paraffin to granulate, press into a ...

Embodiment 2

[0019] Embodiment 2: a kind of positive temperature coefficient ceramic dielectric material, be 15% Yb by mass percentage 2 o 3 and 85% Na 0.2 Bi 0.6 ZrO 3 composition.

[0020] The method for preparing the positive temperature coefficient ceramic dielectric material, the steps are as follows: the raw material Na 2 CO 3 、 Bi 2 o 3 and ZrO 2 According to the general formula Na 0.2 Bi 0.6 ZrO 3 , for batching, ball milling on a ball mill with a speed of 400r / min for 5 hours, drying in a 3.3kw ordinary oven at 100°C for 5 hours, passing through 200 holes / cm 2 Sieve the sample, raise the temperature to 800°C at 7°C / min, and keep it at 800°C for 2 hours to obtain frit A.

[0021] For secondary batching, according to 85% frit A and 15% Yb 2 o 3 Mix evenly, add 70ml of deionized water, mill on a ball mill at a speed of 400r / min for 8 hours, dry at 120°C for 4 hours, pass through 200 holes / cm 2 Dividing sieve, add 7wt% paraffin wax to granulate, press to form a green bo...

Embodiment 3

[0022] Embodiment 3: a kind of positive temperature coefficient ceramic dielectric material, be 20% Yb by weight percentage 2 o 3 and 80% Na 0.2 Bi 0.6 ZrO 3 composition.

[0023] The method for preparing the positive temperature coefficient ceramic dielectric material, the steps are as follows: the raw material Na 2 CO 3 、 Bi 2 o 3 and ZrO 2 According to the general formula Na 0.2 Bi 0.6 ZrO3 , for batching, ball milling on a ball mill with a speed of 400r / min for 4 hours, drying in a 3.3kw ordinary oven at 100°C for 5 hours, passing through 120 holes / cm 2 Sieve the sample, raise the temperature to 800°C at 10°C / min, and keep it at 800°C for 4 hours to obtain frit A.

[0024] For secondary batching, according to 80% frit A and 20% Yb 2 o 3 Mix evenly, add 70ml of deionized water, mill on a ball mill at a speed of 400r / min for 8 hours, dry at 120°C for 5 hours, pass through 120 holes / cm 2 Sieve the sample, add 5wt% paraffin to granulate, press into a green body w...

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Abstract

The invention belongs to the technical field of ceramic dielectric materials, and provides a positive-temperature-coefficient ceramic dielectric material and a preparing method thereof in order to solve the problem that a capacitance temperature coefficient of an existing ceramic dielectric material is positive or negative and continuously changes within the range from -55 DEG C to 150 DEG C. Theceramic dielectric material is prepared from, by mass, 80-90% of Na0.2Bi0.6ZrO3 and 10-20% of Yb2O3. The ceramic dielectric material has the advantages of high dielectric constant, low in dielectric loss and positive temperature coefficient. The material Na0.2Bi0.6ZrO3 has a perovskite structure and has no Curie peak within the range from -55 DEG C to 150 DEG C, Na+ and Bi3+ can be stably fixed after Yb2O3 is dopted, and the ceramic dielectric material has a positive capacitance temperature coefficient within the range from -55 DEG C to 150 DEG C.

Description

technical field [0001] The invention belongs to the technical field of ceramic dielectric materials, and in particular relates to a positive temperature coefficient ceramic dielectric material and a preparation method thereof. Background technique [0002] Chip Multilayer Ceramic Capacitor (MLCC) is one of the three major passive electronic components. It, together with chip inductors and chip resistors, constitutes an indispensable basic passive component in the electronic information industry. MLCC has the advantages of compact structure, high specific volume, small volume, low loss, and low price. In addition to being widely used in civil electronic equipment such as mobile communications, radio and television, household appliances, home computers, medical equipment, and measuring instruments, MLCC is also used in aerospace , Military mobile communications, tank electronics, military signal monitoring and weapon warhead control and other military electronic equipment and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622H01G4/12H01G4/30
CPCC04B35/48C04B35/622C04B2235/3201C04B2235/3224C04B2235/3298C04B2235/5436C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567H01G4/1236H01G4/30
Inventor 郭雅晶薛乃涛毛丽君
Owner TAIYUAN NORMAL UNIV
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