a flake 2 w 3 o 12 synthesis method

A technology of Y2W3O12 and synthesis method, applied in the field of material chemistry, to achieve the effects of simple process, compensation of thermal expansion, and stable shape control

Active Publication Date: 2020-07-28
合肥萃励新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Flaky Y 2 W 3 o 12 The synthesis of

Method used

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  • a flake <sub>2</sub> w <sub>3</sub> o <sub>12</sub> synthesis method

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Embodiment 1

[0010] Dissolve 0.225mol / L ammonium tungstate and 0.1-0.15mol / L yttrium nitrate in N,N-dimethylformamide, add 3 mol / L oxalic acid and 0.2mol / L α-naphthalenesulfonic acid, stir well, Move the solution into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, tighten the seal, and put it in a constant temperature oven at 220°C for 8 hours; after the reaction, filter the precipitate and wash it repeatedly with deionized water until the pH value is 7 ~8; Use centrifuge sedimentation or suction filtration equipment to filter and separate the sediment, put it in an oven at 70 ° C to dry to obtain figure 1 The final product shown is flake Y 2 W 3 o 12 .

Embodiment 2

[0012] Dissolve 0.225mol / L ammonium metatungstate and 0.15mol / L yttrium nitrate in N,N-dimethylformamide, add 2mol / L oxalic acid and 0.15mol / L β-naphthalenesulfonic acid, stir well, and transfer the solution into In a hydrothermal reaction kettle with a polytetrafluoroethylene liner, tighten the seal, put it in a constant temperature oven at 200°C and let it stand for 12 hours to react; after the reaction, filter the precipitate and wash it repeatedly with deionized water until the pH value is 7-8; Use centrifuge sedimentation or suction filtration equipment to filter and separate the precipitate, and put it in an oven at 70 ° C to dry to obtain the final product sheet Y 2 W 3 o 12 .

Embodiment 3

[0014] Dissolve 0.15mol / L sodium tungstate and 0.1mol / L yttrium chloride in N,N-dimethylformamide, add 1.5mol / L oxalic acid and 0.15mol / L 1,5-dinaphthalenesulfonic acid, stir Evenly, move the solution into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, tighten the seal, and put it in a constant temperature oven at 220°C for 10 hours; after the reaction, filter the precipitate and wash it repeatedly with deionized water until the pH The value is 7~8; use centrifuge sedimentation or suction filtration equipment to filter and separate the precipitate, put it in an oven at 60°C and dry it to get the final product sheet Y 2 W 3 o 12 .

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Abstract

The invention provides a synthetic method of flake Y2W3O12. The synthetic method comprises the following steps: tungstate and yttrium salt are dissolved in N,N-dimethyl formamide, wherein a atomic ratio Y to W is 2:3, oxalic acid and a template are added and uniformly stirred, a solution is moved to a hydro-thermal reaction vessel having a polytetrafluoroethylene inner container, the hydro-thermalreaction vessel is tightly screwed and sealed, the material is placed in a constant temperature baking oven at the temperature of 200-220 DEG C for a standing reaction for 8-12 hours; after the reaction is completed, sediment is filtered, deionized water is used for repeatedly cleaning the material until a pH value is 7-8, centrifuge deposition or pumping filtration equipment is employed for filtering the separated sediment, and the material is placed in a baking oven at the temperature of 50-70 DEG C to obtain a final product. The cost of the raw material is low, the synthetic method is a whole-liquid phase chemical reaction process, the process is simple, the morphology control for the flake Y2W3O12 is stable, the product can be used as a filling material for an electronic packaging metal support plate, and has the effect for compensating thermal expansion.

Description

technical field [0001] The invention belongs to the technical field of material chemistry and relates to a flake Y 2 W 3 o 12 synthetic method. Background technique [0002] With the development of science and technology, all kinds of electronic products are increasingly miniaturized and multi-functional, and the requirements for their reliability are also getting higher and higher. The thermal expansion characteristics of circuit board substrates greatly affect the reliability of electronic devices. Rare earth tungstate Y 2 W 3 o 12 With significant negative thermal expansion properties, a composite packaging material close to zero expansion can be obtained by matching metal powder metallurgy with an appropriate composition ratio or blending with polymer materials. Y 2 W 3 o 12 Common preparation methods of particles include solid phase method, sol-gel method, combustion method, co-precipitation method and so on. Flaky Y 2 W 3 o 12 Syntheses have rarely been r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00
CPCC01G41/006C01P2004/03
Inventor 汪元元
Owner 合肥萃励新材料科技有限公司
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