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Low-loss titanium barium stannate dielectric material

A technology of barium titanate stannate and dielectric materials is applied in the field of preparation of low-loss barium titanate stannate dielectric materials, and can solve the problems of large dielectric loss and temperature coefficient, restricting applications, reducing the dielectric constant of materials and the like

Inactive Publication Date: 2017-12-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, BaTiO 3 As a dielectric material for ferroelectric phase shifters, its dielectric loss and temperature coefficient are large, which limits its further application
In order to reduce the BaTiO 3 The temperature coefficient of the material can be modified by compound doping with rare earth elements to make the Curie peak shift to the left and broaden, but this method will reduce the dielectric constant of the material, and the cost of rare earth elements is also high

Method used

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  • Low-loss titanium barium stannate dielectric material

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Experimental program
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Effect test

Embodiment 1

[0021] 1. BaCO 3 、TiO 2 , SnO 2 According to the stoichiometric formula Ba(Sn 0.15 Ti 0.85 )O 3 For batching, the ratio is: 8.172gBaCO 3 , 2.8122g TiO 2 , 0.9287gSnO 2 , put 10g of mixed powder into a nylon tank, add 200ml of deionized water, add 150g of zirconium balls, and ball mill on a planetary ball mill for 6 hours at a speed of 400 rpm.

[0022] 2. Put the ball-milled powder in a drying oven, dry it at 100°C, and pass it through a 40-mesh sieve;

[0023] 3. Pre-fire the dried and sieved powder in a medium-temperature furnace at 1100°C and keep it warm for 4 hours.

[0024] 4. Mix the pre-fired powder in step 3 with 0.5wt% PVA, put it into a ball mill tank, add zirconia balls and deionized water, ball mill for 12 hours, dry and sieve, and then use a powder tablet machine Pressed into a green body with a pressure of 4MPa;

[0025] 5. Sinter the body at 1350°C and keep it warm for 4 hours to make low-loss Ba(Sn 0.15 Ti 0.85 )O 3 medium material.

Embodiment 2～10

[0027] Examples 2-10 are completely the same as Example 1 except for x value, calcining temperature and sintering temperature.

[0028] Specific Examples of the Invention The dielectric properties of the obtained product were tested by HEWLETT PACKARD 4278A (Agilent 4278A) at 1 kHz.

[0029] The relevant process parameters and dielectric properties of specific embodiments are shown in Table 1.

[0030] Table 1

[0031]

[0032]

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Abstract

The invention discloses a low-loss titanium barium stannate dielectric material. A chemical formula of the low-loss titanium barium stannate dielectric material is Ba(SnxTi1-x)O3 (x is greater than or equal to 0.01 and less than or equal to 0.3): mixing BaCO3, TiO2 and SnO2 according to an stoichiometric equation, ball milling, drying, sieving, pre-burning at 1050 to 1200 DEG C, adding 0.5 percent by weight of PVA, mixing, ball milling, drying, sieving, and pressing and molding into a green body; burning the green body at 1275 to 1400 DEG C, and obtaining the low-loss titanium barium stannate dielectric material. A dielectric constant sigma r of the low-loss titanium barium stannate dielectric material is 5000 to 11560, and the dielectric loss is 0.003 to 0.008.

Description

technical field [0001] The invention belongs to the field of electronic information materials and components, in particular to a method for preparing a low-loss titanium barium stannate dielectric material Background technique [0002] With the gradual development of electronic equipment in the direction of miniaturization, informatization and high intelligence, requirements for light weight, thinner and ultra-miniature electronic components are also put forward. Phased array radar is a very important electronic device. Among them, ferroelectric phase shifter is a kind of component that is widely used. With the gradual development of phased array radar in the direction of miniaturization and low loss, the improvement of ferroelectric The room temperature permittivity of dielectric materials used in phase shifters, reducing the dielectric loss and temperature coefficient have become the research direction of many researchers. [0003] BaTiO 3 Ceramic is a typical ferroelect...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/626
CPCC04B35/468C04B35/62615C04B2235/442C04B2235/96
Inventor 李玲霞孙正于仕辉杜明昆
Owner TIANJIN UNIV
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