Dielectric ceramic material, method for manufacturing same, and composite dielectric material

A technology of ceramic materials and manufacturing methods, applied in fixed capacitor dielectrics, chemical instruments and methods, titanium compounds, etc., can solve the problems of low dielectric constant of composite dielectrics, and achieve excellent filling, high dielectric constant, and excellent dispersion. Effect

Active Publication Date: 2018-01-02
NIPPON CHECMICAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In Patent Document 1, there is no problem with workability, but there is a problem that the amount that can be filled in the resin is about 30% by volume at most, and the dielectric constant of the obtained composite dielectric is low.

Method used

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  • Dielectric ceramic material, method for manufacturing same, and composite dielectric material
  • Dielectric ceramic material, method for manufacturing same, and composite dielectric material
  • Dielectric ceramic material, method for manufacturing same, and composite dielectric material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098]

[0099] 720 g of pure water was added to 130 g of barium chloride dihydrate and 130 g of oxalic acid dihydrate, and stirred at a temperature of 55° C. for 0.5 hours, and the obtained suspension was used as liquid A.

[0100] In addition, to TiO 2 560 g of pure water was added to 256 g of titanium tetrachloride aqueous solution converted into 15.3 mass %, and the solution which diluted was made B liquid.

[0101] Next, liquid B was added to liquid A at a reaction temperature of 55° C. over 30 minutes while stirring, and aging was performed for 0.5 hours while stirring was continued after the addition. After the aging, filter to recover the barium titanyl oxalate.

[0102] Next, the recovered barium titanyl oxalate was reslurried in pure water, and left to dry at 80° C. for 24 hours to obtain a powder of barium titanyl oxalate.

[0103]

[0104] 20 g of the obtained barium titanyl oxalate powder was put into an alumina crucible, the temperature was raised over 5 ho...

Embodiment 2

[0106]

[0107] The powder of barium titanyl oxalate was obtained in the same manner as in Example 1.

[0108]

[0109] Barium titanate particles were obtained in the same manner as in Example 1 except that the firing temperature was set to 1200°C. Table 1 shows various physical properties of the obtained barium titanate particles. In addition, the SEM photograph of the obtained barium titanate particles is shown in figure 1 , the particle size distribution is shown in figure 2 .

Embodiment 3

[0111]

[0112] The powder of barium titanyl oxalate was obtained in the same manner as in Example 1.

[0113]

[0114] Barium titanate particles were obtained in the same manner as in Example 1 except that the firing temperature was set to 1250°C. Table 1 shows various physical properties of the obtained barium titanate particles.

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Abstract

Provided is a dielectric ceramic material which is characterized in that: the dielectric ceramic material comprises perovskite (ABO3) composite oxide particles; the value of ((D90-D10)/D50) is 1.2 orless, where D10 is the particle size at which an accumulated value in a volume frequency particle size distribution measurement by a laser diffraction scattering method is 10%, D50 is the particle size at which the accumulated value therein is 50%, and D90 is the particle size at which the accumulated value therein is 90%; the average particle size D50 is 3 to 15 [mu]m; and the relationship between the theoretical specific surface area (m2/g) calculated by the average particle size D50 and the BET specific surface area (m2/g) measured by the BET method is 0.5<=((BET specific surface area-theoretical specific surface area)/theoretical specific surface area)<=9.0.

Description

technical field [0001] The present invention relates to a dielectric ceramic material useful as an inorganic filler for a composite dielectric, a method for producing the same, and a composite dielectric material using the same. Background technique [0002] For the miniaturization, thinning and high density of electronic equipment, more and more multilayer printed circuit boards are used. The multilayer printed circuit board increases the packaging density by providing a layer made of a high dielectric constant material on the inner layer or the surface layer, and thus can cope with further miniaturization, thinning and high density of electronic equipment. [0003] Conventionally, as a high dielectric constant material, a ceramic sintered body obtained by molding ceramic powder and then firing it is used, so its size and shape are restricted by the molding method. In addition, the sintered body is hard and brittle, so it is difficult to freely process it, and it is very d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/00C01G23/00C04B35/468C04B35/47C04B35/49C04B35/626H01G4/12
CPCH01B3/10H01G4/12C01G23/006C01P2002/34C01P2006/12
Inventor 田边信司
Owner NIPPON CHECMICAL IND CO LTD
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