Low-temperature alkaline-solution synthesis of oxygen metal inorganic compound monocrystal nano-material

An inorganic compound, single crystal nanotechnology, applied in the growth of polycrystalline materials, chemical instruments and methods, single crystal growth, etc., can solve the problems of small output, difficult to repeat, difficult to industrial production, etc.

Inactive Publication Date: 2007-01-17
SHANDONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In short, these methods are difficult to repeat because of harsh conditions, or because the output is too small and the cost is too high to be put into industrial production
Even so, due to the complexity of the composition and structure of composite oxide materials, these methods are only suitable for laboratory implementation, and the types of composite oxide nanomaterials prepared are only a few

Method used

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  • Low-temperature alkaline-solution synthesis of oxygen metal inorganic compound monocrystal nano-material
  • Low-temperature alkaline-solution synthesis of oxygen metal inorganic compound monocrystal nano-material
  • Low-temperature alkaline-solution synthesis of oxygen metal inorganic compound monocrystal nano-material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Synthesis of Barium Titanate Nanocubes

[0033] 1. Ingredients:

[0034] (1) Weigh 10 grams of KOH and 7 grams of NaOH into a polytetrafluoroethylene container with a volume of 25 milliliters.

[0035] (2) Add 1 mmol of barium chloride and 1 mmol of titanium dioxide to the alkali in the above polytetrafluoroethylene container.

[0036] (3) Teflon container is sealed to keep the reaction process clean.

[0037] 2. Heating and melting:

[0038] Heat the muffle furnace or oven to 210°C, and put the sealed polytetrafluoroethylene container into the heating device. Keep the heating equipment warm for 1 hour and stir to mix the melt and reactants evenly.

[0039] 3. Constant temperature reaction:

[0040] The reactants in the solution were reacted under the above conditions for 48 hours until the reaction was completed.

[0041] 4. Cooling:

[0042] The reaction vessel was taken out from the heating device, and cooled in an ice-water mixture until the reaction vessel dro...

Embodiment 2

[0049] Synthesis of Barium Strontium Titanate Nanocubes

[0050] 1. Ingredients:

[0051] (1) Weigh 10 grams of KOH and 7 grams of NaOH into a polytetrafluoroethylene container with a volume of 25 milliliters.

[0052] (2) Add 0.5 mmol of barium chloride, 0.5 mmol of strontium chloride and 1 mmol of titanium dioxide to the alkali in the above polytetrafluoroethylene container.

[0053] (3) Teflon container is sealed to keep the reaction process clean

[0054] 2. Heating and melting:

[0055] Heat the muffle furnace or oven to 220°C, and put the sealed polytetrafluoroethylene container into the heating device. Keep the heating equipment warm for 1 hour and stir to mix the melt and reactants evenly.

[0056] 3. Constant temperature reaction:

[0057] The reactants in the solution were reacted under the above conditions for 60 hours until the reaction was completed.

[0058] 4. Cooling:

[0059] The reaction vessel was taken out from the heating device, and cooled in an ic...

Embodiment 3

[0066] Synthesis of Iron Tetroxide Nanocubes and Nanocube Columns

[0067] 1. Ingredients:

[0068] (1) Weigh 10 grams of KOH and 7 grams of NaOH into a polytetrafluoroethylene container with a volume of 25 milliliters.

[0069] (2) Add 1 mmol of ferric chloride and 1 mmol of ferric oxide to the alkali in the above polytetrafluoroethylene container.

[0070] (3) Teflon container is sealed to keep the reaction process clean.

[0071] 2. Heating and melting:

[0072] Heat the muffle furnace or oven to 200°C, and put the sealed polytetrafluoroethylene container into the heating device. Keep the heating equipment warm for 1 hour and stir to mix the melt and reactants evenly.

[0073] 3. Constant temperature reaction:

[0074] The reactants in the solution were reacted under the above conditions for 70 hours until the reaction was completed.

[0075] 4. Cooling:

[0076] The reaction vessel was taken out from the heating equipment, and cooled in air until the reaction vessel...

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Abstract

The present invention discloses a hypothermal alkali liquation synthesis process of monocrystalline nanometer materials of oxygenous metal inorganic compounds. The compound oxide monocrystalline nanometer materials are synthesized with the inorganic salt of a metal and the oxide of another metal as main materials, melted mixed alkali as solvent, at atmospheric pressure and relatively low temperature of about 200DEG C. The present invention uses melted alkali as solvent for the first time and can synthesize oxide nanometer materials of different structures, compositions and functions, or monocrystalline nanometer materials of simple oxide and hydroxide. This process utilizes conventional materials and only controls the time and temperature during synthesis in favor of the industrial application. The produced monocrystalline nanometer materials includes ferroelectric and piezoelectric materials, ferromagnetic materials, semiconductive materials, ionic conductive materials, colossal magnetoresistance materials, high dielectric materials superconductors and etc. that can be applied to microelectronics, photoelectronics and communication.

Description

technical field [0001] The invention relates to a method for preparing an oxygen-containing metal inorganic compound, especially a single-crystal nanostructure of an oxide and hydroxide, in particular to a low-temperature alkali-melt synthesis method for an oxygen-containing metal inorganic compound single-crystal nano-material. Background technique [0002] The so-called composite oxide refers to a compound made of two or more metal ions and oxygen atoms, and its general formula is A x B y o z . Many composite oxides, such as composite metal oxides with perovskite, spinel, garnet and other structures, have many important properties such as ferroelectricity, ferromagnetism, semiconductor performance, luminescence performance, photoelectric performance and catalytic performance. performance, and has been widely valued. Due to the sudden change in material properties caused by quantum effects and other size effects, the nanostructure of these materials has received extensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22
Inventor 刘宏王中林胡陈果
Owner SHANDONG UNIV
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