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Formula and prepn process of glass ceramics for HF chip inductor

A glass-ceramic, chip technology, applied in the direction of inductors, fixed inductors, fixed signal inductors, etc., can solve the problems of development lag, affecting the overall development of electronic products, etc., to promote nucleation growth and reduce sintering temperature. Effect

Inactive Publication Date: 2005-02-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Over the years, due to reasons such as the structure and materials of inductors, its development has seriously lagged behind the development of the other two types of passive components, which has affected the overall development of electronic products.

Method used

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  • Formula and prepn process of glass ceramics for HF chip inductor
  • Formula and prepn process of glass ceramics for HF chip inductor
  • Formula and prepn process of glass ceramics for HF chip inductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh CaO (40wt%) by weight percentage, B 2 o 3 (18wt%), SiO 2 (38wt%), ZnO (2.5wt%) and P 2 o 5 (1.5 wt%). After ball milling for 3 hours to mix the materials evenly, dry it at 70°C, put it into a platinum crucible, melt the glass (1350°C, keep it warm for 2 hours), and quench the molten glass into distilled water to obtain a transparent cullet. The cullet was subjected to wet ball milling (the ratio of glass to ethanol was 1:1 for 24 hours) so that the powder was glass powder NO1 with an average particle size of 1.0 μm, and the glass-ceramic material of the present invention was obtained. After granulation (the ratio of glass-ceramic material powder and 5% polyvinyl butyral is 60 / 40) and drying, it is dry-pressed at a pressure of 1.5 tons. The dry-pressed tablet was first degummed at 550°C (4 hours of heat preservation), then rapidly heated to 850°C (heating rate of 10°C / min) and held for 2 hours, and then a glass-ceramic with good dielectric properties was obtai...

Embodiment 2

[0025] Weigh CaO (42wt%) by weight percentage, B 2 o 3 (31wt%), SiO 2 (24wt%), ZnO (0.5wt%) and P 2 o 5 (2.5 wt%). After ball milling for 3 hours to mix the material evenly, dry it at 70°C, put it into a platinum crucible, melt the glass (1400°C, keep it warm for 2 hours), and quench the molten glass into distilled water to obtain a transparent cullet. The cullet is subjected to wet ball milling (the ratio of glass to ethanol is 1:1 for 24 hours) to obtain the glass ceramic powder NO2 of the present invention. After granulation (the ratio of glass-ceramic material powder and 5% polyvinyl butyral is 60 / 40) and drying, it is dry-pressed at a pressure of 1.5 tons. The dry-pressed tablet was first degummed at 550°C (4 hours of heat preservation), and then rapidly heated to 780°C (heating rate of 10°C / min) and held for 1.5 hours to obtain a glass-ceramic with good dielectric properties, as shown in Table 1. Show.

Embodiment 3

[0027] Weigh CaO (46wt%) by weight percentage, B 2 o 3 (26wt%), SiO 2 (23wt%), ZnO (3.5wt%) and P 2 o 5 (1.5 wt%). After ball milling for 3 hours to mix the material evenly, dry it at 70°C, put it into a platinum crucible, melt the glass (1380°C, keep it warm for 2 hours), and quench the molten glass into distilled water to obtain a transparent cullet. The cullet is subjected to wet ball milling (the ratio of glass to ethanol is 1:1 for 24 hours) to obtain the glass ceramic powder NO3 of the present invention. After granulation (the ratio of glass-ceramic material powder and 5% polyvinyl butyral is 60 / 40) and drying, it is dry-pressed at a pressure of 1.5 tons. The dry-pressed tablet was first degummed at 550°C (4 hours of heat preservation), and then rapidly heated to 800°C (heating rate of 10°C / min) and held for 2 hours to obtain a glass-ceramic with good dielectric properties, as shown in Table 1. Show.

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Abstract

The formula of nucleated glass ceramics for high-frequency chip inductor comprises five components of CaO, B2O3, SiO2, ZnO and P2O5, and their mixing ratio is: CaO 25-60 wt%, B2O3 10-50 wt%, SiO2 10-60 wt%, ZnO 1-10 wt% and P2O5 1-5 wt%. Said invented nucleated galss ceramics product possesses low dielectric constant (epsilon=4.9-5.5,1MHz), and its sintering temp. is lower (750-850 deg.C). The present invention also provides its preparation method.

Description

technical field [0001] The invention relates to a formula of glass-ceramic ceramics for high-frequency chip inductors and a preparation method thereof, belonging to the field of ceramic materials. Background technique [0002] Miniaturization, mobility, digitalization and high frequency have become the main trends in the development of electronic products today. With the continuous development of microelectronics technology, products such as mobile phones, portable computers, and color large-screen movements are constantly developing towards high frequency, and the production of electronic components suitable for high frequency and ultra-high frequency applications is imminent. Chip inductors are one of the three major types of passive components, which are mainly divided into two categories: multilayer chip inductors and wire-wound chip inductors. According to market estimates made by experts, the two share 60% and 40% respectively, and with the development of technology, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B32/02C03C4/14C03C10/00C03C10/04H01F17/00
CPCC03C10/0054C03C4/14
Inventor 周和平王少洪罗凌虹
Owner TSINGHUA UNIV
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