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Low-medium low-loss LTCC (Low Temperature Co-Fired Ceramic) microwave ceramic material and preparation method thereof

A microwave ceramic, low-loss technology, applied in the field of electronic ceramic materials and its manufacturing, can solve the problems of reducing the microwave performance of ceramics, ceramic cracking, etc., and achieve the effects of improving process compatibility and yield, convenient operation, and low dielectric loss.

Active Publication Date: 2014-07-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Low-temperature sintering can be achieved by adding low-melting oxides and glass phases, but the addition of glass phases will reduce the microwave performance of ceramics, and after the LTCC process is used to make devices or substrates, ceramics have the risk of cracking in case of soldering.

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  • Low-medium low-loss LTCC (Low Temperature Co-Fired Ceramic) microwave ceramic material and preparation method thereof
  • Low-medium low-loss LTCC (Low Temperature Co-Fired Ceramic) microwave ceramic material and preparation method thereof
  • Low-medium low-loss LTCC (Low Temperature Co-Fired Ceramic) microwave ceramic material and preparation method thereof

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Embodiment Construction

[0027] The following description is a specific embodiment of the LTCC microwave ceramic material of the present invention. Such as figure 2 Shown, the concrete preparation method of this material is as follows:

[0028] Step 1: Using CaCO 3 , WO 3 , Li 2 CO 3 As the initial raw material, according to 0.9 CaWO 4 -0.1 Li 2 WO 4 The molar ratio of each element in the formula molecular formula is converted into CaCO 3 , WO 3 and Li 2 CO 3 The mass percentage of the mass percentage is accurately weighed, ball milled in a planetary ball mill for 12 hours at a time, and the ball milled material is placed in an oven and dried at 100°C.

[0029] Step 2: Pass the dried material obtained in Step 1 through a 40-mesh sieve, put it into a crucible for compaction, and pre-burn it at a heating rate of 2 °C / min to 900 °C, keep it for 2 hours, and cool it with the furnace to obtain a pre-fired material for use .

[0030] Step 3: Roughly grind the bulk calcined material obtained in...

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Abstract

A low-dielectric and low-loss LTCC microwave ceramic material and a preparation method thereof, the material is a composite ceramic containing two phases, the main crystal phase is tetragonal scheelite CaWO4, and the auxiliary phase is trigonal scheelite structure Li2WO4, and its formula The molecular formula is (1-x)CaWO4-xLi2WO4. Its preparation method is to use CaCO3, WO3, Li2CO3 as the initial raw materials, convert the mass percentage of CaCO3, WO3 and Li2CO3 according to the molar ratio of each element in the formula molecular formula of (1-x)CaWO4-xLi2WO4, carry out weighing, ball milling, and drying Material, pre-firing, secondary ball milling; a series of processes such as drying material, granulation, molding, sintering, etc. to obtain low dielectric and low loss microwave ceramic materials.

Description

technical field [0001] The invention belongs to the field of electronic ceramic materials and its manufacture, and relates to a low-intermediate and low-loss microwave ceramic material sintered at low temperature and a preparation method thereof. Background technique [0002] In recent years, whether it is general-purpose electronic machines, communication equipment or consumer electronic products in the world, they are rapidly developing in the direction of miniaturization, light weight, integration, multi-function and high reliability. LTCC (Low Temperature Co-fired Ceramics) technology, as an advanced three-dimensional assembly and integration technology, has created conditions for the development of passive devices and hybrid integration of passive / active devices, and has rapidly gained popularity in laminated chip passive devices. a wide range of applications. Many internationally renowned manufacturers of electronic materials and components have entered this field, su...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 唐晓莉章著苏桦张怀武荆玉兰李元勋
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA