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Microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and mass percentage, which is applied in the field of microwave dielectric ceramic materials and its preparation, can solve the problems of limiting the application of MCT system ceramic materials, failing to meet low insertion loss microwave devices, and high dielectric loss, so as to achieve low production costs and meet Use requirements, the effect of low pre-burning temperature

Inactive Publication Date: 2019-09-27
SHANDONG GREEN TEC MOTOR DRIVEN TECH
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Problems solved by technology

MgO-CaO-TiO 2 (MCT) system ceramic material is a good microwave dielectric ceramic material. However, the calcium titanate phase has a high dielectric loss, which cannot meet the requirements of low insertion loss microwave devices. MgO-CaO-TiO 2 The sintering temperature of the system ceramic material is 1400-1450 °C, because of the high sintering temperature, the sintering cost is high, which limits the application of the MCT system ceramic material

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

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Embodiment Construction

[0024] The present invention adopts the light MgO of analytical purity, CaCO 3 、TiO 2 Prepare the main crystal phase as the raw material, with a purity of 4N Er 2 o 3 Doping, the specific implementation method is as follows: weigh the ingredients according to Table 1, put the mixture into the stirring ball mill tank, press the ball to water mass ratio of 1:2:0.8, ball mill for 2 to 6 hours, and the rotating speed is 260 rpm minute. The particle size is controlled at D 50 = within 1.2 μm, press-filter the material mixed with ball mill, dry in an oven at 100°C, pass through a 40-mesh sieve after crushing, pre-burn in a box-type resistance furnace according to the conditions in the table, and pass through a 40-mesh sieve after crushing for later use; Add the doping phase material Er according to the ratio in Table 2 2 o 3 Perform secondary ball milling, control the particle size below 0.8 μm, add 22wt% PVA solution to the slurry, carry out spray granulation, and use a manua...

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Abstract

The invention particularly relates to a microwave dielectric ceramic material with a simple formula and a preparation method thereof. The chemical composition is (1-x)MgTiO3+xCaTiO3+ywt%Er2O3, wherein x is greater than or equal to 0.03 and smaller than or equal to 0.1, and y is greater than or equal to 0 and smaller than or equal to 1. The microwave dielectric ceramic is low in cost and simple in process, the production cost is greatly reduced, the production efficiency is improved, the microwave dielectric ceramic material has a medium and low dielectric constant, small loss and the temperature coefficient close to zero and is suitable for microwave devices such as dielectric resonators, filters and duplexers, the price of raw materials is low, and the process route is simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of electronic information functional materials and devices, and specifically relates to a low-to-medium dielectric constant, high Q f and a temperature coefficient of resonance frequency τ f A microwave dielectric ceramic material with near-zero characteristics and a preparation method thereof. It can be used to make microwave devices such as dielectric resonators, filters and duplexers. Background technique [0002] In recent years, due to the rapid development of microwave communication, the demand for miniaturized and high-performance microwave circuits and microwave devices in modern communication technology fields such as mobile communication, satellite communication, global satellite positioning, Bluetooth, and wireless local area network is increasing. The way to realize the miniaturization, high stability and low cost of microwave equipment is the integration of microwave circuits. Traditional meta...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/465C04B35/622C04B35/626C04B41/88
CPCC04B35/465C04B35/622C04B35/62605C04B41/88C04B41/5116C04B2235/3224C04B2235/602C04B2235/6567C04B2235/77C04B41/4539C04B41/0072
Inventor 王明东戴文金
Owner SHANDONG GREEN TEC MOTOR DRIVEN TECH
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