Preparation method of bismuth system ceramic

A technology of ceramics and bismuth series, applied in the field of preparation of bismuth series ceramics, can solve the problems of easy volatilization of Bi elements, prone to impurity phase, uncertain performance test, etc., and achieve the effects of simple process operation, inhibition of volatilization, and easy realization.

Active Publication Date: 2019-08-06
XINXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present application provides a method for preparing bismuth-based ceramics, which solves the problem that the Bi element is easily volatilized in the high-temperature sintering process of t

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  • Preparation method of bismuth system ceramic
  • Preparation method of bismuth system ceramic
  • Preparation method of bismuth system ceramic

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Embodiment 1

[0036] A method for preparing bismuth-based ceramics, comprising the steps of:

[0037] (1) Weighing the starting raw materials: Calculate the ratio of the high-purity oxide raw materials required for ceramics according to the stoichiometric ratio, where the ceramics are Bi 3.25 La 0.75 Ti 3 o 12 or Bi 3.15 Nd 0.85 Ti 3 o 12 , that is, the B site in the ceramic is not doped, and an excess of 5% of bismuth oxide is selected when the raw materials are mixed;

[0038] (2) Ball milling: put agate balls of three different specifications, large, medium and small, into the ball milling jar, put the weighed starting materials into the ball milling jar, pour absolute ethanol into the ball milling jar, and then Place the ball milling jar in an ultrasonic cleaner for ultrasonic oscillation; place the oscillating ball milling jar on a planetary ball mill for ball milling;

[0039] (3) Drying: Gently remove the lid of the milled jar and replace it with plastic wrap. The plastic wra...

Embodiment 2

[0048] A method for preparing bismuth-based ceramics, comprising the steps of:

[0049] (1) The high-purity oxide raw materials required for ceramics are calculated according to the stoichiometric ratio, wherein the ceramics are Bi 315 Nd 0.85 Ti 29 Cr 0.1 o 12 , that is, the B-site ions in the ceramics are doped in a small proportion. In this embodiment, the doping amount is 0.1, and an excess of 5% of bismuth oxide is selected when the raw materials are mixed; at the same time, a small amount of 5% of bismuth oxide is selected for comparison when the raw materials are mixed. ;

[0050] (2) Ball milling: put agate balls of three different specifications, large, medium and small, into the ball milling jar, put the weighed starting materials into the ball milling jar, pour absolute ethanol into the ball milling jar, and then Place the ball milling jar in an ultrasonic cleaner for ultrasonic oscillation; place the oscillating ball milling jar on a planetary ball mill for ba...

Embodiment 3

[0060] A method for preparing bismuth-based ceramics, comprising the steps of:

[0061] (1) The high-purity oxide raw materials required for ceramics are calculated according to the stoichiometric ratio, wherein the ceramics are Bi 3.25 La 0.75 Ti 2.75 Fe 0.125 co 0.125 0 12 or Bi 3.15 Nd 0.85 Ti 2.75 Fe 0.125 co 0.125 o 12 , that is, the B-site ion doping amount in the ceramic is 0.25, and a small amount of 5% of bismuth oxide is selected when the raw materials are mixed;

[0062] (2) Ball milling: put agate balls of three different specifications, large, medium and small, into the ball milling jar, put the weighed starting materials into the ball milling jar, pour absolute ethanol into the ball milling jar, and then Place the ball milling jar in an ultrasonic cleaner for ultrasonic oscillation; place the oscillating ball milling jar on a planetary ball mill for ball milling;

[0063] (3) Drying: Gently remove the lid of the milled jar and replace it with plastic ...

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Abstract

The invention relates to a preparation method of a bismuth system ceramic. When a starting material is weighed according to a stoichiometric ratio and the doping proportion of B-position ions in the starting material is small, the use amount of Bi2O3 is increased on the basis of the original ratio; and when the doping proportion of the B-position ions in the starting material is large, the use amount of Bi2O3 is reduced on the basis of the original ratio. The problem of many uncertain factors in subsequent performance test due to impureness and impure phase of a prepared Bi system material, caused by easy volatilization of the Bi element in the high-temperature sintering process of conventional methods, is solved.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, in particular to a preparation method of bismuth-based ceramics. Background technique [0002] There are four main methods for preparing functional ceramics, including chemical co-precipitation, hydrothermal synthesis, sol-gel method, and solid-phase sintering method. Although the solid phase sintering process has its inherent disadvantages, such as high energy consumption, low efficiency, and insufficient powder fineness, this method does not use solvents, and the powder particles prepared by this method have no agglomeration, good filling performance, low cost, The advantages of large output and simple preparation process have become a common method for preparing new bulk materials. [0003] Multiferroic materials have two or more order parameters such as ferroelectric, ferromagnetic or ferroelastic at the same time, and the coupling between these two ferroic order parameters will ...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622C04B35/63
CPCC04B35/475C04B35/622C04B35/6303C04B2235/3227C04B2235/3232C04B2235/3298C04B2235/3224C04B2235/3241C04B2235/3272C04B2235/3275C04B2235/3281
Inventor 遆瑞霞苏芸王斌王晁阳吴花蕊程素君郭笑天王德华
Owner XINXIANG UNIV
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