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Molybdenum-base low-temperature-sintered microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and low-temperature sintering, which is applied in the direction of ceramics and inorganic insulators, which can solve the problems of high price, high toxicity, and limited promotion of TeO2, and achieve simple chemical composition and preparation process, adjustable dielectric constant, and sintering The effect of low temperature

Inactive Publication Date: 2013-08-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But TeO 2 The price itself is very high and highly toxic, these shortcomings limit its promotion in industry
Therefore, if a performance similar to TeO can be developed 2 A system with more advantages in price and environmental friendliness may have a huge impact on the LTCC industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a molybdenum-based low-temperature sintered microwave dielectric ceramic material, comprising the following steps:

[0032] 1) The raw material Bi of analytical purity 2 o 3 、MoO 3 and V 2 o 5 By composition Bi 0.99333 (Mo 0.02 V 0.98 )O 4 After mixing, fully ball mill for 5 hours, dry at 120°C, pass through a 200-mesh sieve and briquette, and then keep warm at 700°C for 4 hours to obtain a sample briquette;

[0033] 2) After pulverizing the sample burnt block, after secondary ball milling for 5 hours, dry it at 120°C, pass through a 200-mesh sieve, press the block, and heat it again at 700°C for 4 hours to obtain the second sample burnt block;

[0034] 3) After pulverizing the sintered block of the secondary sample, after fully ball milling for 5 hours, drying at 120°C and then granulating, and then sifting through double-layer sieves of 60 mesh and 120 mesh to obtain the required porcelain powder, and the porcelain The material powder i...

Embodiment 2

[0038] A method for preparing a molybdenum-based low-temperature sintered microwave dielectric ceramic material, comprising the following steps:

[0039] 1) The raw material Bi of analytical purity 2 o 3 、MoO 3 and V 2 o 5 By composition Bi 0.98 (Mo 0.06 V 0.94 )O 4 After mixing, fully ball mill for 4 hours, dry at 150°C, pass through a 200-mesh sieve and briquette, and then heat at 700°C for 6 hours to obtain a sample briquette;

[0040] 2) After pulverizing the sample burnt block, after secondary ball milling for 4 hours, dry it at 150°C, pass through a 200-mesh sieve, press the block, and heat it again at 700°C for 6 hours to obtain the second sample burnt block;

[0041] 3) After pulverizing the sintered block of the secondary sample, ball mill it fully for 4 hours, dry it at 150°C and granulate it, and then sieve it through double-layer sieves of 60 mesh and 120 mesh to obtain the required porcelain powder. The material powder is pressed into shape (cylindrical s...

Embodiment 3

[0045] A method for preparing a molybdenum-based low-temperature sintered microwave dielectric ceramic material, comprising the following steps:

[0046] 1) The raw material Bi of analytical purity 2 o 3 、MoO 3 and V 2 o 5 By composition Bi 0.96667 (Mo 0.1 V 0.9 )O 4 After mixing, fully ball mill for 6 hours, then dry at 100°C, pass through a 200-mesh sieve and briquette, and then heat at 700°C for 5 hours to obtain a sample briquette;

[0047] 2) After pulverizing the sample burnt block, ball mill it for 6 hours for the second time, then dry it at 100°C, pass through a 200-mesh sieve, press the block, and heat it again at 700°C for 6 hours to obtain the second sample burnt block;

[0048] 3) After pulverizing the sintered block of the secondary sample, after fully ball milling for 6 hours, drying at 100°C and then granulating, and sieving through double-layer sieves of 60 mesh and 120 mesh to obtain the required porcelain powder, and the porcelain powder The powder i...

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Abstract

The invention discloses a molybdenum-base low-temperature-sintered microwave dielectric ceramic material and a preparation method thereof. The formula of the ceramic material is Bi1-x / 3(MoxV1-x)O4, wherein 0.02<=x<=0.95. The molybdenum-base low-temperature-sintered microwave dielectric ceramic disclosed by the invention has the characteristics of adjustable relative dielectric constant (24.5-74), favorable microwave behavior (Qf=7200GHz-10700GHz), lower sintering temperature (620-840 DEG C), adjustable temperature coefficient of resonance frequency (-380 to +135ppm / DEG C) and simple chemical composition. By adopting the solid-phase reaction sintering method, the invention is simple in technological operation, environment-friendly and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics, and relates to a microwave dielectric ceramic material and a preparation method thereof, in particular to a molybdenum-based low-temperature sintered microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] With the rapid development of modern information technology, higher and higher requirements are put forward for the miniaturization, portability, multi-function, high reliability and low cost of electronic products. Low temperature co-fired ceramics (Low Temperature Co-fired Ceramics, LTCC) technology is an eye-catching multidisciplinary integrated component technology that has emerged in recent years. Because of its excellent electronic and thermomechanical properties, it has become , the preferred way of modularization. It uses thick film materials, and according to the pre-designed structure, the electrode materials, substrates, elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622H01B3/12
Inventor 周迪庞利霞郭靖姚熹
Owner XI AN JIAOTONG UNIV
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