BaO-Ln2O3-TiO2-series microwave capacitor medium material and preparation method thereof

A technology of bao-ln2o3-tio2 and capacitor dielectric, which is applied in the direction of fixed capacitor dielectric, fixed capacitor parts, ceramics, etc., can solve the problems of large temperature coefficient and no main component, and achieve excellent microwave dielectric properties and excellent microwave Dielectric properties, the effect of satisfying mobility

Inactive Publication Date: 2011-06-15
XIAMEN SUNYEAR ELECTRONICS CO LTD
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Problems solved by technology

[0003] Although BaO-Ln 2 o 3 -TiO 2 It is a microwave capacitor dielectric material, but there is no main component (Ba 1-X-Y Mg X mn Y ) (Nd 2-Z SM Z ) Ti 5 o 14 Compound microwave capacitor dielectric material, when its main parameter εr=90~100...

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  • BaO-Ln2O3-TiO2-series microwave capacitor medium material and preparation method thereof
  • BaO-Ln2O3-TiO2-series microwave capacitor medium material and preparation method thereof

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Embodiment Construction

[0014] Below in conjunction with embodiment the present invention will be further described, but the content of the present invention is not limited to embodiment.

[0015] The microwave capacitor dielectric material provided by the present invention is composed of: main component (Ba 1-X-Y Mg X mn Y ) (Nd 2-Z SM Z ) Ti 5 o 14 The solid solution is 89-96wt%, the sintering accelerator is 1.5-5wt%, and the modified dopant is 0.5-6wt%.

[0016] In the above composition, the main component is prepared by solid phase method at 1200℃~1300℃ (Ba 1-X-Y Mg X mn Y ) (Nd 2-Z SM Z ) Ti 5 o 14 , where X=0~0.02, Y=0~0.05, Z=0.002~0.025; sintering aids include Bi 2 03 , B 2 0 3 , CuO, V 2 0 5 , Li 2 O, ZnO, SiO 2 , Nb 2 o 5 、 Ta 2 o 5 One or more mixtures of oxides with low melting points; modified dopants include different metal oxides such as ZrO 2 , MgO, TiO 2 , MnO 2 , SrO and CaO etc. one or more mixtures.

[0017] The weight percentage of the above-mentioned s...

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Abstract

The invention discloses a BaO-Ln2O3-TiO2-series microwave capacitor medium material and a preparation method thereof. The microwave capacitor medium material is characterized by consisting of (Ba1-X-YMgXMnY) (Nd2-ZSmZ) Ti5O14 serving as a main component, a sintering additive and a modification dopant, wherein X is equal to 0 to 0.02, Y is equal to 0 to 0.05 and Z is equal to 0.002 to 0.025; the sintering additive comprises one or the mixture of low-melting-point oxides such as Bi2O3, B2O3, CuO, V2O5, Li2O, ZnO, SiO2, Nb2O5, Ta2O5 and the like and low-melting-point glass powder; and the modification dopant comprises one or the mixture of different metal oxides such as ZrO2, MgO, TiO2, MnO2, SrO, CaO and the like. By adopting the method, the uniform microwave capacitor medium material which can be sintered at the temperature of between 1,250 DEG C and 1,330 DEG C and has high microwave dielectric property is prepared, wherein epsilon r is equal to 90 to 100, Q.f is more than or equal to 5,500 GHZ (3.5 to 4.5 GHZ), and tau f (at the temperature of between 40 DEG C below zero and 25 DEG C or between 25 DEG C and 125 DEG C) is less than or equal to 10 PPM/DEG C.

Description

technical field [0001] The present invention relates to a kind of BaO-Ln 2 o 3 -TiO 2 The invention relates to a microwave capacitor dielectric material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics is a new type of functional electronic ceramics developed rapidly in the past 30 years. It has the characteristics of low loss, small frequency temperature coefficient, and high dielectric constant. Microwave ceramic materials can be used to make dielectric resonators (Dielectric Resonator, DR for short), dielectric filters, duplexers, microwave dielectric antennas, dielectric frequency stabilized oscillators (called DRO), dielectric waveguide transmission lines, etc. Microwave dielectric ceramics have attracted worldwide attention in the fields of modern communications and military technology. At present, microwave devices are developing in the direction of high integration, miniaturization, high reliability and low cost. As a...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622H01B3/12H01G4/12
Inventor 邹海雄张军志林康李太坤
Owner XIAMEN SUNYEAR ELECTRONICS CO LTD
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