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Preparation method of BiFeO3 porcelain added with Bi2O3-B2O3-SiO2 glass

A bi2o3-b2o3-sio2, glass technology, applied in the field of ceramic dielectric materials, can solve the problems of difficult detection of antiferromagnetism, large leakage conduction current, low dielectric constant, etc., and achieve saturation hysteresis loop and dielectric loss The effect of reducing and increasing the dielectric constant

Active Publication Date: 2015-05-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shift causes the valence state of iron ions to fluctuate (Fe 3+ converted to Fe 2+ ), the fluctuation of the iron valence state produces a large conductance, so that the BiFeO 3 The leakage conduction current is large
And BiFeO 3 Low dielectric constant and low resistivity make it difficult to observe hysteresis loop at room temperature, BiFeO 3 It is difficult to measure the antiferromagnetism at room temperature, these characteristics greatly limit its application

Method used

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  • Preparation method of BiFeO3 porcelain added with Bi2O3-B2O3-SiO2 glass
  • Preparation method of BiFeO3 porcelain added with Bi2O3-B2O3-SiO2 glass
  • Preparation method of BiFeO3 porcelain added with Bi2O3-B2O3-SiO2 glass

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preparation example Construction

[0034] A kind of added Bi 2 o 3 -B 2 o 3 -SiO 2 Glass BiFeO 3 The preparation method of pottery, comprises the following steps:

[0035] Step 1: Preparation of BiFeO 3 : According to the molar ratio of 1:1 Bi 2 o 3 and Fe 2 o 3 Mix to form a blend, then ball mill, dry, and briquette the blend, then place it at 780°C for 1 hour to form a pure phase of BiFeO 3 Powder;

[0036] Step 2: Preparation of Bi 2 o 3 -B 2 o 3 -SiO 2 Glass:

[0037] a. Burn the corundum crucible to 900-920°C in a muffle furnace;

[0038] b. Bi according to the molar ratio 2 o 3 :B 2 o 3 :SiO2 2 = 65:10:25 ratio for batching;

[0039] c. Put the prepared material into the crucible and continue to burn to 1250-1270°C, then keep it warm for 1-1.5h, after water quenching, grinding, and passing through an 80-mesh sieve to get Bi 2 o 3 -B 2 o 3 -SiO 2 Glass;

[0040] Step 3: Bi obtained in Step 2 2 o 3 -B 2 o 3 -SiO 2 Glass is added to the BiFeO obtained in step 1 by mass perce...

Embodiment 1

[0051] BiFeO of the present invention 3 Based on environmental protection relaxation ceramic dielectric material, its formula is BiFeO 3 +x wt% Bi 2 o 3 -B 2 o 3 -SiO 2 , where x=5, x is the mass percentage.

[0052] Step 1: Preparation of BiFeO 3 : According to the molar ratio of 1:1 Bi 2 o 3 and Fe 2 o 3 Mix to form a blend, then ball mill, dry, and briquette the blend, then place it at 780°C for 1 hour to form a pure phase of BiFeO 3 Powder;

[0053] Step 2: Preparation of Bi 2 o 3 -B 2 o 3 -SiO 2 Glass:

[0054] a. Burn the corundum crucible to 900°C in a muffle furnace;

[0055] b. Bi according to the molar ratio 2 o 3 :B 2 o 3 :SiO2 2 = 65:10:25 ratio for batching;

[0056] c. Put the prepared material into the crucible and continue to burn to 1250°C, then keep it warm for 1 hour, quench in water, grind, and pass through an 80-mesh sieve to get Bi 2 o 3 -B 2 o 3 -SiO 2 Glass;

[0057] Step 3: Bi obtained in Step 2 2 o 3 -B 2 o 3 -SiO 2 ...

Embodiment 2

[0061] BiFeO of the present invention 3 Based on environmental protection relaxation ceramic dielectric material, its formula is BiFeO 3 +x wt% Bi 2 o 3 -B 2 o 3 -SiO2 , wherein x=5.5, x is the mass percentage.

[0062] Step 1: Preparation of BiFeO 3 : According to the molar ratio of 1:1 Bi 2 o 3 and Fe 2 o 3 Mix to form a blend, then ball mill, dry, and briquette the blend, then place it at 780°C for 1 hour to form a pure phase of BiFeO 3 Powder;

[0063] Step 2: Preparation of Bi 2 o 3 -B 2 o 3 -SiO 2 Glass:

[0064] a. Burn the corundum crucible to 910°C in a muffle furnace;

[0065] b. Bi according to the molar ratio 2 o 3 :B 2 o 3 :SiO2 2 = 65:10:25 ratio for batching;

[0066] c. Put the prepared material into the crucible and continue to burn to 1260°C and keep it warm for 1.5h. After water quenching, grinding, and passing through an 80-mesh sieve, Bi is obtained. 2 o 3 -B 2 o 3 -SiO 2 Glass;

[0067] Step 3: Bi obtained in Step 2 2 o 3 -B...

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Abstract

The invention discloses a preparation method of BiFeO3 porcelain added with Bi2O3-B2O3-SiO2 glass. The method is characterized by comprising the following steps: step one, preparing BiFeO3; step two, preparing Bi2O3-B2O3-SiO2 glass; step three, adding the Bi2O3-B2O3-SiO2 glass obtained in the step two in mass percent of 5-9wt% in the BiFe3O obtained in the step to form a mixture, mixing the mixture with zirconia ball stone and deionized water, ball-milling and drying to obtain dried material, orderly pelleting and screening the dried material to form pelletized material; step four, manufacturing the pelletized material obtained in the step three into a sample, sintering to obtain a sintered sample; step five, grinding and cleaning the sintered sample obtained in the step four, uniformly coating the front and back sides of the ground and cleaned sintered sample with silver electrode slurry, sintering to obtain the BiFeO3 porcelain added with Bi2O3-B2O3-SiO2 glass. The low-loss porcelain dielectric material obtained by using the method disclosed by the invention is simple in preparation process and low in material cost, and has saturated ferroelectric hysteresis loop and low dielectric loss.

Description

technical field [0001] The invention relates to the field of ceramic dielectric materials, in particular to a Bi-added 2 o 3 -B 2 o 3 -SiO 2 Glass BiFeO 3 Methods of preparation of ceramics. Background technique [0002] With the increasingly higher requirements of human beings for ecological protection, material performance and size, the development of new materials at the atomic scale and the design and integration of the characteristics of different materials have become the focus of new material research. Scientists have proposed that functional nanomaterials with both ferroelectricity and ferromagnetism can be manufactured. This special functional material is used in information storage, microwave field, current measurement of high-voltage transmission lines, wide-band magnetic detection, and multifunctional electronic devices such as sensors, Brakes, sensors, converters and other aspects have considerable development potential, and have received extensive attenti...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 蒲永平王亚茹靳乾
Owner SHAANXI UNIV OF SCI & TECH
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