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Microwave dielectric LTCC material and preparation method thereof

A microwave dielectric and raw material technology, applied in the field of microwave dielectric LTCC materials and their preparation, can solve problems such as low dielectric loss, and achieve the effect of reducing loss

Active Publication Date: 2016-07-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

I1-HwanPark reported that CaWO 4 with Mg 2 SiO 4 Mixing increases the porcelain density of the material system and obtains good microwave performance: 0.9CaWO 4 -0.1Mg 2 SiO 4 Sintered at 1200°C, ε r =10.0, Q×f=129858GHz, τ f =-49.6ppm / ℃ ("MicrowavedielectricpropertiesandmixturebehaviorofCaWO 4 -Mg 2 SiO 4 ceramics", Jpn.J.Appl.Phys.Vol.40(2001)pp.4956-4960), the hybrid material system has very low dielectric loss, but can only achieve high temperature sintering

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  • Microwave dielectric LTCC material and preparation method thereof
  • Microwave dielectric LTCC material and preparation method thereof
  • Microwave dielectric LTCC material and preparation method thereof

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Embodiment Construction

[0025] The following description is a specific embodiment of the LTCC microwave dielectric ceramic material of the present invention. Such as figure 1 Shown, the concrete preparation method of this material is as follows:

[0026] Step 1: According to the molar ratio of CaCO 3 : WO 3 =1:1 weighing configuration CaWO 4 Raw materials, according to the molar ratio Li 2 CO 3 : TiO 2 =1:1 weighing configuration Li 2 TiO 3 Raw materials; the prepared CaWO 4 and Li 2 TiO 3 The raw materials are ball-milled once, mixed evenly, and then dried for later use;

[0027] Step 2: After sieving the two drying materials obtained in Step 1, put them into crucibles for compaction respectively, raise the heating rate of 3°C / min to 850°C for pre-burning, keep the temperature for 3 hours, and cool down with the furnace to obtain their respective pre-burning materials. burning material;

[0028] Step 3: Raw material mole ratio Li 2 CO 3 :B 2 o 3 :SiO2 2 :CaO:Al 2 o 3 =52.45:31.06...

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Abstract

The invention belongs to the field of electronic ceramic materials and preparation thereof, and in particular relates to a microwave dielectric LTCC material and a preparation method thereof. The CaWO4 system microwave dielectric LTCC material provided by the invention comprises two phases of mixed CaWO4 and Li2TiO3 and 0.5-1wt% of an LBSCA glass fluxing agent, wherein tetragonal-phase scheelite CaWO4 is taken as the main crystal phase; a monoclinic system structure Li2TiO3 is taken as the auxiliary phase; the weight percentage ratio of the mixed material CaWO4 to Li2TiO3 is (84-86%):(14-16%); the total mixed material weight percentage of the LBSCA glass fluxing agent is 0.5-1wt%. The sintering temperature of the material is 900-950 DEG C, the dielectric constant of the material is 11.8-12.4, the Q*f value of the material is 57000-76000GHz, and the temperature coefficient of resonance frequency of the material is minus 2.9-1.1ppm / DEG C. The microwave dielectric LTCC material can be widely applied to LTCC microwave substrates and laminated microwave devices and modules.

Description

technical field [0001] The invention belongs to the field of electronic ceramic materials and its manufacture, in particular to a microwave dielectric LTCC material with low loss and low resonance frequency temperature coefficient characteristics and a preparation method thereof. Background technique [0002] In recent years, the emergence of LTCC (low temperature co-fired ceramics) technology has created conditions for the development of passive devices and hybrid integration of passive / active devices, and has rapidly been widely used in stacked chip passive devices. Many electronic materials and components manufacturers and universities have developed and produced various LTCC chip passive devices and components. In order to obtain high-performance LTCC passive integrated devices and components, high-performance LTCC materials are first required. . [0003] However, the current commercialized high-performance LTCC materials are mainly monopolized by foreign countries, and...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/626C04B35/64
CPCC04B35/495C04B35/6261C04B35/62645C04B35/62695C04B35/64C04B2235/3203C04B2235/3208C04B2235/3232C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/96C04B2235/9607
Inventor 苏桦张硕唐晓莉张怀武荆玉兰李元勋刘保元
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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