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A method for preparing single pure phase bismuth ferrite material based on ion compensation

A bismuth ferrite and ion technology, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problems of segregation, volatile components of bismuth oxide, etc., and achieve no impurity introduction, clear cubic crystal structure, and easy process conditions. control effect

Inactive Publication Date: 2017-03-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention uses bismuth oxide and iron oxide as raw materials, adopts three-step sintering and two-time ion compensation to prepare bismuth ferrite material, in order to solve the technical problem that bismuth oxide is volatile and causes component segregation in the process of preparing bismuth ferrite, and the preparation is obtained Single pure phase bismuth ferrite material

Method used

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  • A method for preparing single pure phase bismuth ferrite material based on ion compensation
  • A method for preparing single pure phase bismuth ferrite material based on ion compensation
  • A method for preparing single pure phase bismuth ferrite material based on ion compensation

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Embodiment 1

[0030] A preparation method of single pure phase bismuth ferrite material specifically includes the following steps:

[0031] Step 1: Using bismuth oxide and iron oxide as raw materials, according to BiFeO 3 Calculate the mass percentage of bismuth oxide and iron oxide from the ratio of the metal elements, weigh and mix the materials, then use deionized water as the grinding medium, wet ball milling in a planetary ball mill for 18 hours, so that the raw materials are fully mixed evenly Mixed powder after ball milling; among them, the speed of the ball mill is 220 rpm, alternating directions once every 1 hour;

[0032] Step 2: Dry the mixed powder obtained in step 1 at 90°C in a blast drying oven to obtain a dried powder; then put the dried powder into a sintering furnace for the first time Pre-sintering, the pre-sintering temperature is 700℃, the time is 1.5h, and the heating rate is 2℃ / min. After the first pre-sintering is completed, it is cooled to room temperature with the furna...

Embodiment 2

[0039] A preparation method of single pure phase bismuth ferrite material specifically includes the following steps:

[0040] Step 1: Using bismuth oxide and iron oxide as raw materials, according to BiFeO 3 Calculate the mass percentage of bismuth oxide and iron oxide from the ratio of the metal elements, weigh and mix the materials, and then use deionized water as the grinding medium. Wet ball milling in a planetary ball mill for 18 hours to make the raw materials fully mixed evenly. Mixed powder after ball milling; among them, the speed of the ball mill is 220 rpm, alternating directions once every 1 hour;

[0041] Step 2: Dry the mixed powder obtained in step 1 at 100°C in a blast drying oven to obtain a dried powder; then put the dried powder into the sintering furnace for the first time Pre-sintering, the pre-sintering temperature is 700℃, the time is 1.5h, and the heating rate is 2℃ / min. After the first pre-sintering is completed, it is cooled to room temperature with the fu...

Embodiment 3

[0048] A preparation method of single pure phase bismuth ferrite material specifically includes the following steps:

[0049] Step 1: Using bismuth oxide and iron oxide as raw materials, according to BiFeO 3 Calculate the mass percentage of bismuth oxide and iron oxide from the ratio of the metal elements, weigh and mix the materials, and then use deionized water as the grinding medium. Wet ball milling in a planetary ball mill for 18 hours to make the raw materials fully mixed evenly. Mixed powder after ball milling; among them, the speed of the ball mill is 220 rpm, alternating directions once every 1 hour;

[0050] Step 2: Dry the mixed powder obtained in step 1 at 100°C in a blast drying oven to obtain a dried powder; then put the dried powder into the sintering furnace for the first time Pre-sintering, the pre-sintering temperature is 700℃, the time is 1.5h, and the heating rate is 2℃ / min. After the first pre-sintering is completed, it is cooled to room temperature with the fu...

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Abstract

The invention provides a method for preparing a single pure-phase bismuth ferrite material based on ion compensation, which belongs to the field of ceramic material preparation. First prepare the bismuth ferrite ceramic reaction mixture, and perform the first pre-sintering after drying; then add 0.3-0.7wt% bismuth oxide through the second ball mill for ion compensation, and perform the second pre-sintering after drying; Add 0.2-0.4wt% bismuth oxide for ion compensation by ball milling, sinter at 810-835°C for 0.5-1.5h after drying, and naturally cool to room temperature with the furnace to obtain a single-phase pure-phase bismuth ferrite material. The present invention uses bismuth oxide and iron oxide as raw materials, and adopts three-step sintering and two ion compensations to prepare a single pure-phase bismuth ferrite material, so as to solve the technical problem that bismuth oxide is volatile and causes component segregation in the process of preparing bismuth ferrite. A single pure phase bismuth ferrite material was prepared.

Description

Technical field [0001] The invention relates to the field of ceramic material preparation, in particular to a method for preparing a single pure phase bismuth ferrite material based on ion compensation. Background technique [0002] Bismuth Ferrite BiFeO 3 (BFO) is a typical multiferroic material with a high Curie transition temperature (T c = 1103K) and Neil transition temperature (T N =643K), it is one of the very few single-phase multiferroic materials that have both ferroelectricity and weak ferromagnetism under normal temperature conditions. As early as the 1960s, people have successfully prepared bismuth ferrite BiFeO 3 (BFO) powder material, but the temperature range for generating BFO single phase is quite narrow, and it is easy to produce impurity phases. Therefore, the preparation and research of single phase BFO powder is a long and slow process. It is easy to produce impurity phases when preparing bismuth ferrite materials because the element Bi is volatile, and the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00
Inventor 李颉张怀武廖宇龙李强李元勋马国坤
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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