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Preparation method of calcium doped lead titanate ceramic fiber

A ceramic fiber, lead titanate technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of lead titanate ceramic difficulties, large coercive field, sample fragmentation and other problems, achieve high uniformity, reduce Calcination temperature, easy modification effect

Inactive Publication Date: 2017-09-15
HEBEI CHEM & PHARMA COLLEGE
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Problems solved by technology

However, with the development of science and technology, the requirements for materials are getting higher and higher. Not only do fibers have good crystallization properties and precise stoichiometric ratios, but they also require fibers to have smooth and complete surfaces, as well as different physical and chemical properties. On the other hand, due to the large square coercive field of lead titanate, the grain boundary energy of ceramics is high, so that when it passes through the Curie point in the calcination process, it is easy to cause the sample to break or even pulverize, thus giving titanate The preparation of lead ceramics brings certain difficulties

Method used

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  • Preparation method of calcium doped lead titanate ceramic fiber
  • Preparation method of calcium doped lead titanate ceramic fiber
  • Preparation method of calcium doped lead titanate ceramic fiber

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Embodiment Construction

[0036] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0037] A method for preparing calcium-doped lead titanate ceramic fibers, the innovation of which is that a sol-gel method is adopted, and the specific steps are as follows:

[0038] (1) Preparation of stable sol:

[0039]a. Mix tetrabutyl titanate with chelating agent triethanolamine, and heat to reflux, then add solvent absolute ethanol to fully stir to form a clear sol;

[0040] b. Add the catalysts glacial acetic acid, calcium acetate, and lead acetate trihydrate in sequence to the clear sol, the concentration is controlled at 1mol / L, and reflux and stir in a water bath at 80°C for 1 hour to obtain stable Pb 1-x Ca x TiO 3 (x=0-30%) pale yellow stable sol;

[0041] The molar ratio of calcium acetate to lead acetate trihydrate, glacia...

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Abstract

The invention relates to a preparation method of calcium doped lead titanate ceramic fiber, and the preparation method is characterized by comprising the following specific steps: (1) preparation of stable sol; (2) drawing and drying; (3) decomposition of dry gel fiber; and (4) sintering. The sintering conditions are as follows: the sintering temperature is 750 DEG C, the sintering time is 60min, and the heating rate is 2 DEG C / min. The preparation method has scientific and reasonable design, simple process, easy operation, low cost, and other advantages, the ceramic fiber prepared by the method has high strength, superior performance, smooth surface, high density, low tendency to fragmentation and other advantages, and the method has the advantages of convenient operation and easy implementation, and is a highly innovative preparation method of the calcium doped lead titanate ceramic fiber.

Description

technical field [0001] The invention relates to a method for preparing ceramic fibers, in particular to a method for preparing calcium-doped lead titanate ceramic fibers. Background technique [0002] Lead titanate (PbTiO 3 ) is a ferroelectric material with a tetragonal perovskite structure, which has high Curie temperature, large axial ratio, small relative permittivity, large piezoelectric anisotropy, good stability, and easy adjustment of performance parameters, etc. Advantages, it is a very important ferroelectric material, and fiber is an ideal geometry for reducing heat capacity in small devices and improving response and sensitivity, which expands its use in micro devices, so it has a wide range of applications prospect. However, with the development of science and technology, the requirements for materials are getting higher and higher. Not only do fibers have good crystallization properties and precise stoichiometric ratios, but they also require fibers to have s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/10C04B35/472C04B35/622C04B35/624
CPCD01F9/10C04B35/472C04B35/62231C04B35/624C04B2235/3208
Inventor 胡亚伟
Owner HEBEI CHEM & PHARMA COLLEGE
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