Unlock instant, AI-driven research and patent intelligence for your innovation.

Lead-free giant-dielectric low-loss high-insulation-resistance ceramic material under broadband and preparation method thereof

A technology of resistive ceramics and giant dielectric, which is applied in the field of preparation of giant dielectric, low loss and high insulation resistance ceramic materials under lead-free broadband, can solve the problems of limiting potential applications, high dielectric loss, etc., and achieve good frequency stability and Effects of temperature stability, low dielectric loss, and low material cost

Active Publication Date: 2019-04-19
SHAANXI UNIV OF SCI & TECH
View PDF13 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Giant dielectric materials are often accompanied by high dielectric loss (>0.1), lower insulation resistance (DC100V, R9 Ω), and strong temperature, frequency and electric field dependence, which to some extent limits the potential application of giant dielectric materials in the microelectronics industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lead-free giant-dielectric low-loss high-insulation-resistance ceramic material under broadband and preparation method thereof
  • Lead-free giant-dielectric low-loss high-insulation-resistance ceramic material under broadband and preparation method thereof
  • Lead-free giant-dielectric low-loss high-insulation-resistance ceramic material under broadband and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of giant dielectric low loss high insulation resistance ceramic material under lead-free broadband, its formula is Sr 1- x La x TiO 3 ,in x =0.006.

[0022] Step 1: Preparation of pure phase Sr 1-x La x TiO 3 spare. According to molar ratio 0.994 : 0.006:1 Weigh SrCO 3 , La 2 o 3 and TiO 2 Mix to form a mixture. SrCO 3 , La 2 o 3 、TiO 2 The purity is above 99.0%.

[0023] Use a planetary ball mill to mill for 8 hours, then dry at 80°C for 36 hours, briquette, and place it in a box furnace at 1150°C for 3 hours to form Sr 1-x La x TiO 3 Powder;

[0024] Step 2: the synthesized Sr 1-x La x TiO 3 The powder is mixed with zirconia balls and deionized water according to the mass ratio of 1:4.8:0.8, and then ball milled for 18 hours and dried to obtain the dried material;

[0025] Step 3: Grinding the dried material through a 120-mesh sieve to form a sieved material;

[0026] Step 4: The sieved material obtained in step 3 is pres...

Embodiment 2

[0030] A preparation method of giant dielectric low loss high insulation resistance ceramic material under lead-free broadband, its formula is Sr 1- x La x TiO 3 ,in x =0.01.

[0031] Step 1: Preparation of pure phase Sr 1-x La x TiO 3 spare. Weigh SrCO according to the molar ratio 0.99:0.01:1 3 , La 2 o 3 and TiO 2 Mix to form a mixture. SrCO 3 , La 2 o 3 、TiO 2 The purity is above 99.0%.

[0032] Use a planetary ball mill to mill for 8 hours, then dry at 80°C for 28 hours, briquette, and place it in a box furnace at 1200°C for 3 hours to form Sr 1-x La x TiO 3 Powder;

[0033] Step 2: the synthesized Sr 1-x La x TiO 3 The powder is mixed with zirconia balls and deionized water according to the mass ratio of 1:5:1, and then ball milled for 20 hours and dried to obtain the dried material;

[0034] Step 3: Grinding the dried material through a 120-mesh sieve to form a sieved material;

[0035] Step 4: The sieved material obtained in step 3 is pressed into...

Embodiment 3

[0039] A preparation method of giant dielectric low loss high insulation resistance ceramic material under lead-free broadband, its formula is Sr 1- x La x TiO 3 ,in x =0.014.

[0040] Step 1: Preparation of pure phase Sr 1-x La x TiO 3 spare. Weigh SrCO according to the molar ratio 0.986:0.014:1 3 , La 2 o 3 and TiO 2 Mix to form a mixture. SrCO 3 , La 2 o 3 、TiO 2 The purity is above 99.0%.

[0041] Use a planetary ball mill to mill for 8 hours, then dry at 80°C for 24 hours, briquette, and place it in a box furnace at 1200°C for 3 hours to form Sr 1-x La x TiO 3 Powder;

[0042] Step 2: the synthesized Sr 1-x La x TiO 3 The powder is mixed with zirconia ball stone and deionized water according to the mass ratio of 1: 5: 1 and then ball milled for 24 hours and dried to obtain the dried material;

[0043] Step 3: Grinding the dried material through a 120-mesh sieve to form a sieved material;

[0044] Step 4: The sieved material obtained in step 3 is p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Insulation resistanceaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a lead-free giant-dielectric low-loss high-insulation-resistance ceramic material under the broadband. The method comprises the steps that SrCO3, La2O3and TiO2 are subjected to ball grinding, dried, pressed into blocks and roasted to synthesize Sr1-(i)x( / i)La(i)x( / i)TiO3 powder, then the powder is subjected to ball grinding and dried again, 120-mesh screening is conducted in sequence, and a screening material is formed; a grinding tool is used for pressing the powder into blocks, and then cold isostatic pressing is used for acquiring a compactblank; the prepared compact blank is roasted in nitrogen to obtain a test sample and then treated in air. The Sr1-(i)x( / i)La(i)x( / i)TiO3 lead-free giant-dielectric low-loss high-insulation-resistanceceramic material obtained through the method has giant dielectric constant (larger than 25,000), low dielectric loss (smaller than 0.035) and high insulation resistance (DC100V, R is larger than 109 omega) under the broadband (0.1 kHz-1MHz). The technology is simple, the material cost is low, and the material is environmentally friendly and becomes an important candidate material applied to an industrial application material.

Description

technical field [0001] The invention relates to the field of dielectric ceramic capacitors, in particular to a preparation method of a lead-free broadband ceramic material with a large dielectric, low loss and high insulation resistance. Background technique [0002] At present, giant dielectric constant materials have received extensive attention, which refers to materials with a dielectric constant > 10 3 dielectric material. Giant dielectric materials can not only be used to manufacture capacitors with relatively small volume and large capacity, but also have good conversion total energy density when used as electromechanical, thermoelectric and photoelectric transducers, so they have a wide range of applications in various aspects of electronic technology. potential applications. Giant dielectric materials are often accompanied by high dielectric loss (>0.1), lower insulation resistance (DC100V, R<10 9 Ω), and strong temperature, frequency, and electric field...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/47C04B35/622C04B35/626
CPCC04B35/47C04B35/622C04B35/62605C04B2235/3227C04B2235/6567C04B2235/661
Inventor 蒲永平郭旭王雯史瑞科李经纬杨梦蝶张磊师裕
Owner SHAANXI UNIV OF SCI & TECH