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High temperature stable X9R type multilayer ceramic capacitor dielectric material and preparation method thereof

A capacitor dielectric and multilayer ceramic technology, applied in the field of functional ceramic materials, can solve the problems of poor capacitance stability of MLCC, achieve good temperature stability, overcome high temperature reduction effect, high industrialization prospects and industrial application value

Active Publication Date: 2014-07-23
FUJIAN TORCH ELECTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, X7R and X8R type MLCC devices are not competent, because their corresponding service temperature upper limit is 125°C and 150°C respectively, and the dielectric constant of the existing pure barium titanate drops sharply above the Curie temperature (about 125°C). , MLCC capacitors have poor stability and are not suitable for directly making X9R ceramic dielectric materials

Method used

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  • High temperature stable X9R type multilayer ceramic capacitor dielectric material and preparation method thereof
  • High temperature stable X9R type multilayer ceramic capacitor dielectric material and preparation method thereof
  • High temperature stable X9R type multilayer ceramic capacitor dielectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0038] (1) Weigh 52.26g Bi respectively 2 o 3 , 11.89g Na 2 CO 3 and 35.85g TiO 2 , mixed ball milling, sieving, and calcining at 800°C for 4 hours to synthesize sodium bismuth titanate;

[0039] (2) Accurately weigh 136.25g of barium titanate and 13.75g of bismuth sodium titanate, mix them by ball milling, dry them, crush them through a 40-mesh sieve, and calcinate at 1200°C for 3 hours to synthesize a co-fusion compound;

[0040] (3) For 53.88g of barium titanate and sodium bismuth titanate eutectic compound and 1.12g of Nb 2 o 5 Weighing, ball milling, drying, crushing and passing through a 40-mesh sieve, and calcining at 1080°C for 3 hours to synthesize the eutectic compound;

[0041] (4) 17.74g CaCO 3 , 10.96g H 3 BO 3 , 21.30g SiO2 2 Weighing, ball milling with alcohol as the medium, drying, crushing through a 40-mesh sieve, and calcining at 800°C for 4 hours to synthesize calcium borosilicate oxide;

[0042] (5) 94.79g BaCO 3 and 55.21 gMnCO 3 Ball milling,...

specific Embodiment 2

[0044] (1) Weigh 52.26g Bi respectively 2 o 3 , 11.89g Na 2 CO 3 and 35.85g TiO 2 , mixed ball milling, sieving, and calcining at 900°C for 2 hours to synthesize sodium bismuth titanate;

[0045] (2) Accurately weigh 136.25g of barium titanate and 13.75g of bismuth sodium titanate, mix them by ball milling, dry them, crush them through a 40-mesh sieve, and calcinate at 1140°C for 4 hours to synthesize a co-fusion compound;

[0046] (3) For 53.88g of barium titanate and sodium bismuth titanate eutectic compound and 1.12g of Nb 2 o 5 Weighing, ball milling, drying, crushing through a 40-mesh sieve, and calcining at 1060°C for 4 hours to synthesize the eutectic compound;

[0047] (4) 17.74g CaCO 3 , 10.96g H 3 BO 3 , 21.30g SiO2 2 Weighing, ball milling and mixing with alcohol as the medium, drying, crushing through a 40-mesh sieve, and calcining at 800°C for 4 hours to synthesize calcium borosilicate oxide;

[0048] (5) 94.79g BaCO 3 and 55.21 gMnCO 3 Ball milling, ...

specific Embodiment 3

[0050] (1) Weigh 52.26g Bi respectively 2 o 3 , 11.89g Na 2 CO 3 and 35.85g TiO 2 , mixed ball milling, sieving, and calcining at 850°C for 3 hours to synthesize sodium bismuth titanate;

[0051] (2) Accurately weigh 136.25g of barium titanate and 13.75g of bismuth sodium titanate, mix them by ball milling, dry them, crush them through a 40-mesh sieve, and calcinate at 1140°C for 2 hours to synthesize a co-fusion compound;

[0052] (3) For 53.76g barium titanate and sodium bismuth titanate eutectic compound and 1.24g Nb 2 o 5 Weighing, ball milling, drying, crushing through a 40-mesh sieve, and calcining at 1120°C for 3 hours to synthesize the eutectic compound;

[0053] (4) 17.74g CaCO 3 , 10.96g H 3 BO 3 , 21.30g SiO2 2 Weighing, ball milling and mixing with alcohol as the medium, drying, crushing through a 40-mesh sieve, and calcining at 900°C for 2 hours to synthesize calcium borosilicate oxide;

[0054] (5) 94.79g BaCO 3 and 55.21 gMnCO 3 Ball milling, drying...

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Abstract

The invention discloses a high temperature stable X9R type multilayer ceramic capacitor dielectric material and a preparation method of the high temperature stable X9R type multilayer ceramic capacitor dielectric material. The high temperature stable X9R type multilayer ceramic capacitor dielectric material disclosed by the invention is prepared by the steps of adding a calcium-boron-silicon compound to a barium titanate-sodium bismuth titanate-niobium pentoxide eutectic compound serving as a matrix, compounding one or more of Ce, Nd and La oxides, and compounding one or more of barium-manganese oxide, magnesium oxide and zinc oxide; and the invention provides the preparation method of the high temperature stable X9R type multilayer ceramic capacitor dielectric material. The X9R type multilayer ceramic capacitor dielectric material prepared by using the material and the method provided by the invention has high temperature resistance (above 200 DEG C), and good temperature stability, and enable components and parts such as multilayer ceramic capacitors, tuners and duplexers to be suitable for the application at a high temperature (above 200 DEG C), thus having extremely high industrialization prospect and industrial application value.

Description

technical field [0001] The invention relates to the technical field of functional ceramic materials, in particular to a high-temperature stable X9R type multilayer ceramic capacitor dielectric material and a preparation method thereof. Background technique [0002] Multilayer ceramic capacitors (hereinafter referred to as MLCC) are an important category of chip components. Due to their compact structure, small size, high specific capacitance, low dielectric loss, and low price, they are widely used in automobiles, computers, mobile phones, etc. Electronic products such as telephones, scanners, and digital cameras are also more and more widely used in military electronic equipment such as aerospace, weapons, ships, and military communications. MLCC is especially suitable for chip surface assembly, which can greatly increase the circuit assembly density and reduce the volume of the whole machine. This outstanding feature makes MLCC the fastest growing and most used chip electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
Inventor 林志盛陈永虹张子山蔡劲军蔡明通
Owner FUJIAN TORCH ELECTRON TECH CO LTD
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