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Medium-temperature sintering temperature-stabilizing type microwave medium ceramic and preparation method thereof

A microwave dielectric ceramic and temperature-stable technology, which is applied in the field of electronic ceramics and its preparation, can solve the problems of high sintering temperature, poor temperature stability, limited practical application, etc., and achieve the effects of reducing sintering temperature, improving stability and low loss.

Pending Publication Date: 2020-02-04
无锡鑫圣慧龙纳米陶瓷技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these materials are MgO-TiO 2 Mainly ceramic powder, its loss is low, the synthesis process is simple, and the price of raw materials is low, but the temperature stability of this type of ceramic is poor, and the sintering temperature is high, which limits its practical application

Method used

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  • Medium-temperature sintering temperature-stabilizing type microwave medium ceramic and preparation method thereof
  • Medium-temperature sintering temperature-stabilizing type microwave medium ceramic and preparation method thereof

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preparation example Construction

[0023] The present invention also provides a method for preparing a temperature-stable microwave dielectric ceramic sintered at a medium temperature, comprising the following steps:

[0024] (1) Preparation of ceramic base material powder: according to the molar ratio of each element in the composition expression xMgO-yTiO2-zCaCO3, MgO, TiO 2 , CaCO 3 Carry out batching, mix well and carry out ball milling, after ball milling, dry, sieve, put into corundum crucible and carry out roasting then, obtain ceramic matrix powder, wherein, in composition expression xMgO-yTiO 2 -zCaCO 3 Among them, x, y, z represent the molar ratio respectively, and 0.85≤x≤0.95, 0<z≤0.06, y=1+z;

[0025] (2) Preparation of microwave dielectric ceramics: according to the mass ratio of ceramic base material and sintering aid in the ratio of 1:0 to 0.14, mix ceramic base material powder and sintering aid, after mixing, ball mill and then bake Drying, granulation and sieving, pressing the sifted mixed p...

Embodiment 1

[0033] This embodiment 1 is used to illustrate the preparation method of the temperature-stable microwave dielectric ceramics sintered at medium temperature of the present invention, comprising the following steps:

[0034] (1) Preparation of ceramic base material powder: in the composition expression xMgO-yTiO 2 -zCaCO 3 Among them, x=0.89, y=1.02, z=0.02, that is, according to the composition expression 0.89MgO-1.02TiO 2 -0.02CaCO 3 The molar ratio of each element in MgO, TiO 2 , CaCO 3 Carry out batching, mix well and carry out ball milling, ball milling time is 4 hours, dry after ball milling, drying temperature is 100 ℃, pass through 60 mesh screens after drying, then put into corundum crucible, vibrate or knock crucible to make powder The materials are densely packed, and fired at 1080°C for 4 hours to obtain ceramic base material powder;

[0035] (2) Preparation of microwave dielectric ceramics: according to the mass ratio of the ceramic base material powder and th...

Embodiment 2

[0038] This embodiment 2 is used to illustrate the preparation method of the temperature-stable microwave dielectric ceramics sintered at medium temperature of the present invention, comprising the following steps:

[0039] (1) Preparation of ceramic base material powder: in the composition expression xMgO-yTiO 2 -zCaCO 3 Among them, x=0.91, y=1.04, z=0.04, that is, according to the composition expression 0.91MgO-1.04TiO 2 -0.04CaCO 3 The molar ratio of each element in MgO, TiO 2 , CaCO 3 Carry out batching, mix well and carry out ball milling, ball milling time is 4 hours, dry after ball milling, drying temperature is 100 ℃, pass through 60 mesh screens after drying, then put into corundum crucible, vibrate or knock crucible to make powder The materials are densely packed, and fired at 1080°C for 4 hours to obtain ceramic base material powder;

[0040] (2) Preparation of microwave dielectric ceramics: according to the mass ratio of the ceramic base material powder and th...

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Abstract

The invention discloses medium-temperature sintering temperature-stabilizing type microwave medium ceramic. The microwave medium ceramic comprises a ceramic base material; and the constitution expression of the ceramic base material is xMgO-yTiO2-zCaCO3, wherein x, y and z represent molar ratio respectively, x is more than or equal to 0.85 and less than or equal to 0.95, z is more than 0 and lessthan or equal to 0.06, and y is the sum of 1 and z. The invention also discloses a preparation method of the medium-temperature sintering temperature-stabilizing type microwave medium ceramic. The microwave medium ceramic takes MgO, TiO2 and CaCO3 as the raw materials, designs proper molar ratio and is sintered by a solid-phase sintering method; and the microwave medium ceramic has high temperature stability, low sintering temperature, low production cost and high practical application value.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its preparation, and in particular relates to a temperature-stable microwave dielectric ceramic sintered at a medium temperature and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics is a new type of functional ceramics developed in recent decades, and it is the key material for the manufacture of microwave dielectric resonators and filters. On the basis of the original microwave ferrite, it has greatly upgraded the formula and manufacturing process, so that it has excellent properties such as suitable electrical constant, low microwave loss, and small temperature coefficient. It is suitable for making various modern microwave ferrites. Devices, such as frequency stabilized oscillators, filters, duplexers, etc. in electronic countermeasures, navigation, communications, radar, household satellite direct TV receivers, and mobile phones, etc., c...

Claims

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Application Information

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IPC IPC(8): C04B35/465C04B35/622
CPCC04B35/465C04B35/622C04B2235/3206C04B2235/3208C04B2235/5427C04B2235/602C04B2235/656C04B2235/6567
Inventor 吉岸王丹王晓慧
Owner 无锡鑫圣慧龙纳米陶瓷技术有限公司