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Nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and zinc niobium titanate, applied in the field of ceramic compositions, can solve the problems of high sintering temperature, decreased dielectric properties, low dielectric constant, etc., and achieves the effects of good comprehensive performance and improved relative dielectric constant.

Inactive Publication Date: 2013-12-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the existing ZnTiNb 2 o 8 As a microwave dielectric material, microwave dielectric ceramics in the system mainly have the following problems: (1) The sintering temperature is too high, and after the sintering temperature is lowered by doping sintering aids, the dielectric properties will also decrease significantly; (2) τ f Negative, the temperature stability is not good enough; (3) The dielectric constant is low, and the ideal dielectric constant can be obtained by appropriate element doping

Method used

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  • Nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and preparation method thereof
  • Nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and preparation method thereof
  • Nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and preparation method thereof

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preparation example Construction

[0032] The preparation method of the present invention is as follows:

[0033] (1) Ingredients

[0034] The raw materials ZnO, Nb 2 o 5 、TiO 2 and Ni 2 o 3 Press (Zn 1-x Ni x )TiNb 2 o 8 , where the stoichiometric ratio of x=0.1 to 0.4 is mixed and put into a ball mill tank for ball milling; the ball milling medium is deionized water and zirconia balls, the weight ratio of balls:material:water is 2:1:0.6; ball milling 6h , with a rotation speed of 800 rpm, then put the mixture into an oven to dry at 90°C, then put it into a mortar for grinding, and pass through a 40-mesh sieve;

[0035] (2) synthesis

[0036] Put the powder sieved in step (1) into a crucible, compact it, cover it, synthesize it in a synthesis furnace at 1050°C, keep it warm for 4 hours, cool it down to room temperature naturally, and take it out of the furnace;

[0037] (3) Secondary ball milling

[0038] After the synthetic material in step (2) is ground, put it into a ball mill tank for ball mill...

specific Embodiment

[0048] x=0.1, the sintering temperature is 1100°C, 1125°C, 1150°C, and 1175°C, which are respectively recorded as Examples 1-1, 1-2, 1-3, and 1-4;

[0049] x=0.2, the sintering temperature is 1100°C, 1125°C, 1150°C, 1175°C, which are respectively recorded as Examples 2-1, 2-2, 2-3, and 2-4;

[0050] x=0.3, the sintering temperature is 1100°C, 1125°C, 1150°C, and 1175°C, which are respectively recorded as Examples 3-1, 3-2, 3-3, and 3-4;

[0051] x=0.4, the sintering temperature is 1100°C, 1125°C, 1150°C, and 1175°C, which are respectively recorded as Examples 4-1, 4-2, 4-3, and 4-4;

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Abstract

The invention discloses nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and a preparation method thereof. The stoichiometric equation is (Zn1-xNix)TiNb2O8, wherein x is equal to 0.1 to 0.4. According to the invention, ZnTiNb2O8 system microwave dielectric ceramic serves as basis, the traditional oxide mixing method is adopted and Ni2O3 is added to increase the dielectric constant, so that the (Zn1-xNix)TiNb2O8 microwave dielectric ceramic material with excellent comprehensive performance is prepared, wherein the optimal sintering temperature is 1,125 DEG C; and epsilon r=41.36, Q*f=31760.2 GHz, and tau f=-9.2 ppm / DEG C. The nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and the preparation method thereof are mainly used for realizing miniaturization of a resonant loop and are widely applied to industries of information, military industry, mobile communication, electrical and electronic appliances, aviation, petroleum exploration and the like.

Description

technical field [0001] The present invention relates to the ceramic composition characterized by composition, especially relates to a kind of (Zn 1-x Ni x )TiNb 2 o 8 Microwave dielectric ceramics of the system and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics are a new type of functional ceramic materials developed in recent decades. It mainly refers to the ceramic material used in microwave frequency (300MHz ~ 30GHz frequency band) circuits as a dielectric material and fulfills one or more functions. It is the key material for manufacturing microwave dielectric filters and resonators and other devices. It has excellent properties such as high dielectric constant, low dielectric loss, and low resonant frequency temperature coefficient. It is suitable for manufacturing various microwave components and can meet the needs of miniaturization, low cost, high reliability and integration of microwave circuits. Microwave dielectric c...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
Inventor 马卫兵陈天凯孙清池郇正利唐翠翠
Owner TIANJIN UNIV
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