Magnesium titanate based composite ceramic sintered at low temperature and preparation method thereof

A technology of composite ceramics and magnesium orthotitanate, which is applied in the field of microwave dielectric materials, low-temperature sintered magnesium orthotitanate-based composite ceramics and its preparation, can solve the problems of inability to co-fire silver electrode materials and limit the application of materials, and achieve excellent microwave Dielectric properties, abundant sources, and low-cost effects

Inactive Publication Date: 2013-07-10
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above studies have shown that Mg 2 TiO 4 The resonance frequency of the base material has been effectively regulated, but the sintering temperature is still as high as 1200°C, which cannot be co-fired with the silver electrode material, which limits the application of the material

Method used

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  • Magnesium titanate based composite ceramic sintered at low temperature and preparation method thereof
  • Magnesium titanate based composite ceramic sintered at low temperature and preparation method thereof
  • Magnesium titanate based composite ceramic sintered at low temperature and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] To prepare 0.9(Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 -0.1 (Ca 0.8 Sr 0.2 )TiO 3 -3.0wt.%LiF-0.8wt.%Fe 2 o 3 -1.5wt.%V 2 o 5 Take the composite ceramic material shown as an example, the raw materials used and the preparation method are as follows:

[0022] 1. Preparation (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 Burnt powder

[0023] Press (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 The stoichiometric ratio of raw materials MgO4.285g, ZnO0.455g, TiO 2 3.574g and SnO 2 1.686g, put into nylon ball mill jar, add 20g agate balls, 20g dehydrated ethanol, the mass ratio of raw material and agate balls, dehydrated ethanol is 1: 2: 2, with planetary ball mill ball mill 6 hours, rotating speed is 360 revs / minutes, put it in an oven and dry it at 80-100°C for 4 hours, put it into a corundum crucible and pre-fire it at 1150°C for 3 hours, and prepare (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 Burnt powder.

[0024] 2. Preparation (Ca 0.8 Sr 0.2 )TiO ...

Embodiment 2

[0030] To prepare 0.9(Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 -0.1 (Ca 0.8 Sr 0.2 )TiO 3 -3.0wt.%LiF-0.8wt.%Fe 2 o 3 -0.5wt.%V 2 o 5 Take the composite ceramic material shown as an example, the raw materials used and the preparation method are as follows:

[0031] In step 3 of the preparation of low-temperature sintered magnesium orthotitanate-based composite ceramics in embodiment 1, press 0.9 (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 -0.1 (Ca 0.8 Sr 0.2 )TiO 3 -3.0wt.%LiF-0.8wt.%Fe 2 o 3 -0.5wt.%V 2 o 5 The stoichiometric ratio of raw materials (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 Calcined powder 9.123g, (Ca 0.8 Sr 0.2 )TiO 3 Calcined powder 0.877g, LiF0.03g, Fe 2 o 3 0.008g and V 2 o 5 0.005g, packed into a nylon ball mill jar, (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 Calcined powder and (Ca 0.8 Sr 0.2 )TiO 3 The molar ratio of calcined powder is 9:1, LiF, Fe 2 o 3 and V 2 o 5 The addition amount is (Mg 0.95 Zn 0.05 ) 2...

Embodiment 3

[0033] To prepare 0.9(Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 -0.1 (Ca 0.8 Sr 0.2 )TiO 3-3.0wt.%LiF-0.8wt.%Fe 2 o 3 -3.0wt.%V 2 o 5 Take the composite ceramic material shown as an example, the raw materials used and the preparation method are as follows:

[0034] In step 3 of the preparation of low-temperature sintered magnesium orthotitanate-based composite ceramics in embodiment 1, press 0.9 (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 -0.1 (Ca 0.8 Sr 0.2 )TiO 3 -3.0wt.%LiF-0.8wt.%Fe 2 o 3 -3.0wt.%V 2 o 5 The stoichiometric ratio of raw materials (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 Calcined powder 9.123g, (Ca 0.8 Sr 0.2 )TiO 3 Calcined powder 0.877g, LiF0.03g, Fe 2 o 3 0.008g and V 2 o 5 0.03g, packed into a nylon ball mill jar, (Mg 0.95 Zn 0.05 ) 2 (Ti 0.8 sn 0.2 )O 4 Calcined powder and (Ca 0.8 Sr 0.2 )TiO 3 The molar ratio of calcined powder is 9:1, LiF, Fe 2 o 3 and V 2 o 5 The addition amount is (Mg 0.95 Zn 0.05 ) 2 (...

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Abstract

The invention relates to magnesium titanate based composite ceramic sintered at low temperature and a preparation method thereof. The magnesium titanate based composite ceramic is composed of the material adopting the following general formula: 0.9 (Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4-0.1(Ca0.8Sr0.2)TiO3-3.0wt%LiF-0.8wt%Fe2O3-xwt%V2O5, wherein x is between 0.5 and 3.0. The sintering temperature of the magnesium titanate based composite ceramic can be decreased to 900 to 975 DEGC, so that the defect of the large temperature coefficient of the resonant frequency of the ceramic material is overcome; and thus the temperature stability of the material is ensured. According to a preparation method, the adopted raw materials are abundant and low in cost, thereby being favorable for industrial production. The magnesium titanate based composite ceramic can be widely used for manufacturing microwave devices such as low-temperature co-fired ceramic systems, GPS (Global Positioning System) antennae, wave filters for wireless local area networks, multilayer dielectric resonators and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its manufacture, and relates to a microwave dielectric material, in particular to a low-temperature sintered magnesium orthotitanate-based composite ceramic and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramic materials used in microwave frequency (300MHz ~ 300GHz) circuits as dielectric materials to complete one or more functions. Ideal microwave dielectric ceramics have a suitable dielectric constant (ε r ), a high quality factor (Q×f), and a temperature coefficient of resonant frequency that tends to zero (τ f ). Components such as resonators, filters, and microwave integrated circuit substrates made of microwave dielectric ceramics have been widely used in modern communication technologies such as mobile communications, wireless local area networks, and military communications. With the development of modern communica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/465C04B35/63C04B35/622
Inventor 刘鹏姚国光
Owner SHAANXI NORMAL UNIV
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