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A kind of antimony ion instead of niobium ion to prepare high quality factor neodymium niobate ceramics

A high quality factor, ion substitution technology, applied in the field of ceramic compositions, to achieve the effect of environmental protection, simple preparation process, and reduced unit cell volume

Inactive Publication Date: 2017-03-15
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on its preparation method and modification.

Method used

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  • A kind of antimony ion instead of niobium ion to prepare high quality factor neodymium niobate ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. According to the microwave dielectric ceramic composition Nd (Nb 1-x Sb x )O 4 (x=0.02), called Nd 2 o 3 -5.5760g, Nb 2 o 5 -4.3168g, Sb 2 o 5 -0.1072g of ingredients, 10g in total; the mixed powder was added to a polyester tank, after adding 160ml of deionized water and 150g of zirconium balls, ball milled on a planetary ball mill for 6 hours, and the speed of the ball mill was 1000 rpm;

[0025] 2. Put the ball-milled raw material in a drying oven, dry at 120°C and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0026] 3. Calcinate the powder at 900°C for 4 hours;

[0027] 4. Put the calcined powder into a polyester tank, ball mill it for 6 hours for the second time, dry it after discharge, and pass through a 40 mesh sieve; then add 6% paraffin wax as a binder for granulation, and Pass through an 80-mesh sieve; use a powder tablet press to press into a green body with a diameter of 10mm and a thickness of 5mm with a pressure of 7M...

Embodiment 2

[0031] 1. According to the microwave dielectric ceramic composition Nd (Nb 1-x Sb x )O 4 (x=0.04), called Nd 2 o 3 -5.5653g, Nb 2 o 5 -4.2206g, Sb 2 o 5 -0.2141g of ingredients, 10g in total; the mixed powder was added to the polyester tank, after adding 160ml of deionized water and 150g of zirconium balls, ball milled on a planetary ball mill for 6 hours, and the speed of the ball mill was 1000 rpm;

[0032] 2. Put the ball-milled raw material in a drying oven, dry at 120°C and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0033] 3. Calcinate the powder at 900°C for 4 hours;

[0034] 4. Put the calcined powder into a polyester tank, ball mill it for 6 hours for the second time, dry it after discharge, and pass through a 40 mesh sieve; then add 6% paraffin wax as a binder for granulation, and Pass through an 80-mesh sieve; use a powder tablet press to press into a green body with a diameter of 10mm and a thickness of 5mm with a pressure of ...

Embodiment 3

[0038] 1. According to the microwave dielectric ceramic composition Nd (Nb 1-xSb x )O 4 (x=0.06), called Nd 2 o 3 -5.5547g, Nb 2 o 5 -4.1248g, Sb 2 o 5 -0.3204g of ingredients, 10g in total; the mixed powder was added to a polyester tank, after adding 160ml of deionized water and 150g of zirconium balls, ball milled on a planetary ball mill for 6 hours, and the speed of the ball mill was 1000 rpm;

[0039] 2. Put the ball-milled raw material in a drying oven, dry at 120°C and pass through a 40-mesh sieve to obtain a powder with uniform particles;

[0040] 3. Calcinate the powder at 900°C for 4 hours;

[0041] 4. Put the calcined powder into a polyester tank, ball mill it for 6 hours for the second time, dry it after discharge, and pass through a 40 mesh sieve; then add 6% paraffin wax as a binder for granulation, and Pass through an 80-mesh sieve; use a powder tablet press to press into a green body with a diameter of 10mm and a thickness of 5mm with a pressure of 7MP...

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Abstract

The invention discloses high-quality-factor neodymium niobate ceramic prepared by replacing a niobium ion with a stibium ion. The ceramic comprises Nd(Nb1-xSbx)O4, wherein the mole number x is greater than 0 and less than or equal to 0.1. A preparation method of the ceramic comprises the steps of blending raw materials Nd2O3, Nb2O5 and Sb2O5 according to a chemical formula, performing ball milling, drying at 80-130 DEG C, performing sieving, calcinating for 4h at 900-1000 DEG C, performing secondary ball milling, pelleting and sieving, performing compression to form a blank body, sintering at 1225-1275 DEG C, and preparing the neodymium niobate ceramic. According to the ceramic, the stibium ion replaces Nb of a B site in NdNbO4; a dielectric constant of the prepared NdNbO4 ceramic is 20.6; a temperature coefficient of resonance frequency reaches -23.1ppm / DEG C; and a maximum quality factor is 73200GHz. The ceramic is simple in preparation technology and environment-friendly in process, and is a promising microwave dielectric material.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a kind of antimony ion replacing niobium ion to prepare high quality factor neodymium niobate ceramics and a preparation method thereof. Background technique [0002] With the development of microwave communication technology, microwave dielectric materials have attracted more and more attention, and materials that can be used in microwave devices should mainly meet the following three parameters, namely high dielectric constant and high quality factor And near-zero resonant frequency temperature coefficient, and these three parameters correspond to the size, operating frequency and thermal stability of the device made of the material. In terms of practical applications, mainly radars and global positioning systems (GPSs) operating in the microwave frequency band. [0003] Rare earth niobate (LnNbO 4 ) is a series of microwave dielectric materials with simila...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/495C04B35/622
Inventor 张平赵永贵
Owner TIANJIN UNIV
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