Preparation methods and application of lanthanum complex precursor, lanthanum oxide fiber and lanthanum zirconate fiber derived from lanthanum oxide fiber

A technology of precursors and complexes, used in the synthesis of lanthanum zirconate organic precursors, the preparation of lanthanum zirconate fibers, and the field of lanthanum oxide, can solve the problems of inability to remove harmful elements, unfriendly environment, etc., to avoid moisture absorption and adhesion , the reaction process is simple, the effect of high macro strength

Active Publication Date: 2021-07-09
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the existing technology, especially the existing defects that a large amount of spinning aids are used in the preparation process of lanthanum oxide and lanthanum zirconate fibers, and the raw materials used are not enviro

Method used

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  • Preparation methods and application of lanthanum complex precursor, lanthanum oxide fiber and lanthanum zirconate fiber derived from lanthanum oxide fiber
  • Preparation methods and application of lanthanum complex precursor, lanthanum oxide fiber and lanthanum zirconate fiber derived from lanthanum oxide fiber
  • Preparation methods and application of lanthanum complex precursor, lanthanum oxide fiber and lanthanum zirconate fiber derived from lanthanum oxide fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A preparation method of lanthanum oxide fiber, comprising the following steps:

[0056] (1) Weigh lanthanum carbonate and propionic acid with masses of 60.00g and 100.00g respectively, add them into a beaker, and heat at 60°C for reaction. The final fully reacted product appears as a transparent viscous resinous liquid macroscopically. Its rheological curve is as figure 1 shown by figure 1 It can be seen that with the increase of shear stress, the liquid product exhibits a complex rheological behavior of first shear thinning and then shear thickening. The obtained reaction product was concentrated under reduced pressure at 70° C. for 0.5 h to obtain a lanthanum oxide precursor.

[0057] (2) Weigh 3.00 g of the lanthanum oxide precursor obtained in step (1), 9.00 g of dichloromethane, and 0.06 g of spinning aid PEO into a beaker, and then stir and mix at 30°C. After being completely dissolved, a transparent spinning solution is obtained.

[0058] (3) Transfer the sp...

Embodiment 2

[0062] The lanthanum oxide fiber was prepared according to the same steps as in Example 1, except that the lanthanum source in step (1) was replaced by an equimolar amount of lanthanum acetate, and the weighed masses were: 30.00 g of lanthanum acetate and 90.00 g of propionic acid.

Embodiment 3

[0064] Lanthanum oxide fibers were prepared according to the same steps as in Example 1, except that the lanthanum source in step (1) was replaced by lanthanum hydroxide in an equimolar amount, and the weighed masses were: lanthanum hydroxide 25.28g, propionic acid 90.00 g.

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Abstract

The invention relates to preparation methods and application of a lanthanum complex precursor, a lanthanum oxide fiber and a lanthanum zirconate fiber derived from the lanthanum oxide fiber. The precursors of the two fibers can be drawn in real time under the condition that no polymer spinning aid is added. For the lanthanum oxide fiber precursor, a precursor capable of being drawn in real time is obtained by taking a lanthanum source and a carboxylic acid ligand as raw materials; and the lanthanum zirconate fiber precursor is obtained by adding a certain proportion of a poly-zirconium precursor on the basis of the lanthanum oxide precursor. The lanthanum oxide and lanthanum zirconate fibers of 0.5-2 [mu]m can be prepared from spinning solutions prepared from the two precursors in an electrospinning mode respectively. The key point of the invention lies in the preparation of the lanthanum zirconate fiber precursor: while the high-spinnability lanthanum zirconate precursor is obtained, the simplicity of the preparation method is ensured, and the method has reference significance for synthesis of other rare earth oxides and zirconate spinnable precursors thereof and preparation of corresponding fibers, and is beneficial to promotion of wide application of the zirconate fiber.

Description

technical field [0001] The invention relates to a method for preparing lanthanum oxide and lanthanum zirconate fibers, in particular to a spinnable lanthanum oxide precursor and the synthesis of a lanthanum zirconate organic precursor derived therefrom, and a fiber preparation method. This method has reference significance for the synthesis of other rare earth oxides and their zirconate spinnable precursors and the preparation of corresponding fibers. The invention belongs to the technical field of new material preparation. Background technique [0002] Because of the advantages of light weight, low thermal conductivity, small heat capacity, good thermal shock resistance and convenient use, ceramic fibers are widely used in industrial furnaces, thermal engineering equipment and aircraft thermal protection systems. [0003] At present, refractory ceramic fibers commonly used for spacecraft heat insulation include quartz fibers, aluminum silicate fibers, mullite fibers, alumi...

Claims

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Application Information

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IPC IPC(8): C07F5/00B01J31/22B01J35/06C09K11/06B01J20/22B01J20/28B01J20/30D01D5/00
CPCC07F5/003B01J31/2213B01J35/06C09K11/06B01J20/223B01J20/28023D01D5/0053B01J2531/37B01J2531/0213C09K2211/182
Inventor 王新强朱泽张晓谦施淑颖郭振峰谢永帅朱陆益张光辉许东
Owner SHANDONG UNIV
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