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Preparation method of inorganic single crystal, preparation method of composite film and application

A composite film and single crystal technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of poor processability, limited application, brittle and fragile quality, etc., and achieve good piezoelectric output performance, The preparation process is environmentally friendly and the process is simple

Active Publication Date: 2021-10-01
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Piezoelectric single crystals and piezoelectric ceramics generally have high d 33 value, but its brittle and brittle, poor processability, most of which are rich in heavy metal elements such as lead, barium, etc., greatly limit its application in the biological field
[0003] Based on the fact that the current piezoelectric single crystal contains heavy metal elements, which is not conducive to environmental protection, it is necessary to provide a new preparation method for inorganic single crystal

Method used

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  • Preparation method of inorganic single crystal, preparation method of composite film and application
  • Preparation method of inorganic single crystal, preparation method of composite film and application
  • Preparation method of inorganic single crystal, preparation method of composite film and application

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preparation example Construction

[0047] The embodiment of the present application provides a method for preparing an inorganic single crystal, comprising the following steps:

[0048] S11, dissolving the sodium salt in water to obtain a first solution;

[0049] S12, adding hexachlorotrimeric phosphazene into an organic solvent, and dissolving it to obtain a hexachlorotrimeric phosphazene solution;

[0050] S13, the first solution is added to the hexachlorotrimeric phosphazene solution, and Na is obtained after standing 3 (PO 2 NH) 3 4H 2 O single crystal;

[0051] Or, the preparation method of inorganic single crystal, comprises the following steps:

[0052] S21, dissolving both the sodium salt and the potassium salt in water to obtain a second solution;

[0053] S22, adding hexachlorotrimeric phosphazene into the first organic solvent, and obtaining hexachlorotrimeric phosphazene solution after dissolving;

[0054] S23, the second solution is added to the hexachlorotrimeric phosphazene solution, and K...

Embodiment 1

[0074] The embodiment of the present application provides a kind of Na 3 (PO 2 NH) 3 4H 2 The preparation method of O single crystal comprises the following steps:

[0075] S11, dissolving 0.24g of NaOH in 10mL of water to obtain a first solution;

[0076] S12. Add 0.3467g of hexachlorotrimeric phosphazene into 10mL of DMF, and dissolve to obtain a DMF solution;

[0077] S13. Add the first solution to the DMF solution and stir evenly, then place it in an oven at 40°C for 24 hours, and finally obtain 0.2238g of Na 3 (PO 2 NH) 34H 2 O crystalline product.

[0078] The embodiment of the present application also provides a method for preparing a composite membrane, comprising the following steps:

[0079] S31. Take 100 mg of the above-prepared Na 3 (PO 2 NH) 3 4H 2 O single crystal was added to 10mL of DMF, and ultrasonically dispersed to obtain a DMF dispersion;

[0080] S32. Add 1 g of PVDF to the DMF dispersion, heat to 60° C. and stir for 12 hours to obtain a PVD...

Embodiment 2

[0083] The embodiment of the present application provides a kind of KNa 2 (PO 2 NH) 3 2H 2 The preparation method of O single crystal comprises the following steps:

[0084] S21, dissolving 0.3366g of KOH and 0.3506g of NaCl in 10mL of water to obtain a second solution;

[0085] S22. Add 0.3467g of hexachlorotrimeric phosphazene into 10mL of DMF, and dissolve to obtain a DMF solution;

[0086] S23. Add the second solution to the DMF solution and stir evenly, then place it in an oven at 40°C for 24 hours, and finally obtain 0.2370g of KNa 2 (PO 2 NH) 3 2H 2 O crystalline product.

[0087] The embodiment of the present application also provides a method for preparing a composite membrane, comprising the following steps:

[0088] S31. Take 25 mg of KNa prepared above 2 (PO 2 NH) 3 2H 2 O single crystal was added to 10mL of DMF, and ultrasonically dispersed to obtain a DMF dispersion;

[0089] S32. Add 1 g of PVDF to the DMF dispersion, heat to 60° C. and stir for 12...

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Abstract

The invention provides a preparation method of an inorganic single crystal, a preparation method of a composite film and application. The preparation method of the inorganic single crystal comprises the following steps: dissolving sodium salt in water to obtain a first solution; adding phosphonitrilic chloride trimer into an organic solvent, and conducting dissolving to obtain a phosphonitrilic chloride trimer solution; adding the first solution into the phosphonitrilic chloride trimer solution, and conducting standing to obtain a single crystal; or dissolving the sodium salt and the potassium salt in water to obtain a second solution; adding phosphonitrilic chloride trimer into an organic solvent, and conducting dissolving to obtain a phosphonitrilic chloride trimer solution; and adding the second solution into the phosphonitrilic chloride trimer solution, and conducting standing to obtain the single crystal. The first solution containing the sodium salt or the second solution containing the potassium salt or the sodium salt reacts with the phosphonitrilic chloride trimer solution to finally prepare the single crystal, the prepared single crystal does not contain heavy metal elements, the preparation process is environment-friendly, and the process is simple. A piezoelectric device prepared from a composite film prepared from the single crystal has relatively good piezoelectric output performance.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a preparation method of an inorganic single crystal, a preparation method and application of a composite film. Background technique [0002] In recent years, a variety of materials with piezoelectric effect, such as inorganic piezoelectric single crystal (such as zinc oxide and zinc sulfide), piezoelectric ceramics (such as lead zirconate titanate, barium titanate, sodium niobate), piezoelectric polymer (such as polyvinylidene fluoride and its copolymers, polyamides) have been developed and widely used in drives, sensors, self-powered systems and energy harvesting. Piezoelectric single crystals and piezoelectric ceramics generally have high d 33 However, its brittleness, poor processability, and most of them are rich in heavy metal elements such as lead and barium, which greatly limit its application in the biological field. [0003] Since the current piezoelectric...

Claims

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Application Information

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IPC IPC(8): C30B29/10C30B7/14D04H1/728H01L41/18
CPCC30B29/10C30B7/14D04H1/728H10N30/852
Inventor 黎明黎婵杨子欣吴奕纯
Owner HUBEI UNIV
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