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Columnar zinc oxide particles and method for producing same

A technology of zinc oxide particles and particles, applied in chemical instruments and methods, zinc oxide/zinc hydroxide, oxide conductors, etc., can solve problems such as insufficient conductivity

Inactive Publication Date: 2012-03-28
KYOWA CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particles obtained by this method are in the form of a fine powder, and since the aspect ratio is too small, the conductivity is insufficient.

Method used

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  • Columnar zinc oxide particles and method for producing same
  • Columnar zinc oxide particles and method for producing same
  • Columnar zinc oxide particles and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] Example 1 (synthesis of columnar zinc oxide particles)

Synthetic example 1

[0151] (reaction)

[0152] In the mixed solution of zinc chloride aqueous solution and aluminum sulfate aqueous solution with a zinc chloride concentration of 1.011 mol / L and an aluminum sulfate concentration of 0.00505 mol / L, the alkali equivalent ratio is set to 1.2, that is, relative to 1 mole of zinc chloride Add 1.2 moles of caustic soda while stirring, and react at 25° C. for 30 minutes. The pH of the reaction slurry was 5.91.

[0153] (rinse)

[0154] The obtained reaction slurry was washed with water.

[0155] (hydrothermal treatment)

[0156] The washed slurry was resuspended in ion-exchanged water, and hydrothermally treated at 120° C. for 15 hours.

[0157] (dry)

[0158] The obtained product was dehydrated, washed, and then dried to obtain particles. As a result of X-ray diffraction, the obtained particles were a mixture of zinc oxide and an alkaline zinc hydroxide compound, and it was found to be columnar crystals from the SEM photograph. Table 1 shows the ...

Synthetic example 2

[0160] Particles were obtained in the same manner as in Synthesis Example 1 except that the alkali equivalent ratio was changed to 1.4, the aluminum sulfate was changed to titanium(IV) sulfate, and the hydrothermal treatment conditions were changed to 170° C. and 20 hours. As a result of X-ray diffraction, the obtained particles were a mixture of zinc oxide and an alkaline zinc hydroxide compound, and it was found to be columnar crystals from the SEM photograph. Table 1 shows the properties of the particles.

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Abstract

Disclosed are columnar zinc oxide particles which are capable of providing a resin with sufficient thermal conductivity or electrical conductivity without being broken or deformed when blended and kneaded into the resin. Specifically disclosed are zinc oxide particles which are characterized by being represented by formula (1) and having a columnar particle content of not less than 80%. (In formula (1), Mn+ represents a trivalent or tetravalent metal; and x and a respectively satisfy the following formulae: 0.002 < x < 0.05 and 0 = a < 0.5.)

Description

technical field [0001] The present invention relates to a new zinc oxide particle. More specifically, it relates to columnar zinc oxide particles useful as a thermal conductivity improver or an electrical conductivity improver. Background technique [0002] Researches on improving the physical properties of the resin composition by blending various modifiers into the resin composition containing rubber, plastic, etc. have been extensively conducted. [0003] Examples of thermal conductivity improvers include crystalline silica, magnesium oxide, boron nitride, aluminum nitride, aluminum oxide, and beryllium oxide. In addition, tin oxide, zinc oxide, carbon black, tin oxide-coated titanium oxide, and the like are known as the conductivity improver. It is well known that in order to impart good conductivity to a composition, it is necessary to mix a large amount of modifiers such that the conductive modifiers are in contact with each other. In the case of expensive conductive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00C01G15/00C01G23/00C01G49/00C08K7/00C08L101/00H01B1/08H01B1/20H01B5/00
CPCH01B1/22B82Y30/00C01P2004/03C01P2004/16C01P2002/52C01G9/02Y10T428/2982C08K3/18C08L101/00C01P2004/11
Inventor 高畑晴美
Owner KYOWA CHEM IND
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