Ceramic Application of New Areas - Electronic Ceramics

80s of last century, with the development of China'sChina already accounts for 65% or more, quite
electronic industry and civilian needs, householdcompelling. In particular, ceramic resonator has a high
electrical appliances in the right ceramic filters andstability, without regulation, small size and low cost.
ceramic resonators demand for the rapid increase inTypical applications include: televisions, camcorders,
Jingdezhen in Jiangxi Province and the Shanghai Radiocomputers, CD ROM drive, Auto Electric, VCD,
999 plants at the same time the introduction of atelephone, copier, voice synthesizer, remote controls
factory in Japan Murata piezoelectric ceramicand toys.
frequency component production line, from theSecond, the piezoelectric ultrasonic transducer.
curtain of a piezoelectric ceramic products in China byPiezoelectric ultrasonic transducer is a transmitting and
a large number of military to civilian production of thereceiving ultrasonic acoustic devices in the water and
prelude. Through the exploration and the introductionair media widely used. In underwater acoustic
of the line digestion Japan advanced materials andcommunication played the role of the radar, known
processes, many domestic small and mediumas the sonar is essential for all kinds of ships
manufacturers of piezoelectric ceramics has beenimportant sensors. In industry, ultrasonic transducers
developed rapidly, such as Zhejiang CapitaCommercialhave been used in ultrasonic cleaning, ultrasonic
Electronics (Jiaxing Xinhua original pottery factory),machining, ultrasonic humidifier, ultrasonic
Jiangsu Jia electronics, Wuxi Baotong Electronics,emulsification, ultrasonic seed treatment, ultrasonic
Suzhou Jie Jia electronics.flaw detection, and ultrasound diagnostics. Today,
CapitaCommercial was main products are electronicpiezoelectric ultrasonic transducer, another widely
piezoelectric ceramic buzzer, the monthly output inused area of telemetry, remote control systems and
the last 10 million, through the introduction ofalarm systems.Third, the piezoelectric sound
advanced technology lines, digestion, absorption andgenerator. Piezoelectric and illustrated the typical
increased domestic production will soon become theproduct is the piezoelectric and piezoelectric buzzer
largest and most complete variety of high frequencyto send, receiver, watches, calculators, electronic
devices manufacturer of piezoelectric ceramic devicesalarm clock, small alarm and telephone, cell phone
in 2007 reached 715 million. Jiangsu, Jia e startringing are inseparable from the buzzer. With a
production of small quantities of multi chip ceramictransistor oscillator circuit and DC power supply may
filter, and now has developed into the largestissue a continuous buzzer sounds, with a switching
domestic manufacturer of IF ceramic filter, to 2007,circuit may be issued intermittent buzzer sounds,
annual output had reached 467 million.belonging to the underwater acoustic transducer
Ceramic materials to achieve great developmentmicrophone and speakers can also be used to expel
Looking back at the development of piezoelectricor to lure fish.Fourth, measurement and control of
ceramic industry 20 years ago, only Shandongpiezoelectric devices. Measurement and control of
University, Tsinghua University, South China Institutepiezoelectric devices are pressure, acceleration,
of Technology, Tianjin University, Sichuan University,angular rate sensors and ultrasonic sounding,
Shanghai Science and several universities such asultrasonic thickness measurement, ultrasonic velocity
piezoelectric materials and applications withmeasurements, ultrasound diagnostics.
professional, Shanghai Silicate Institute of PowerFifth, the piezoelectric ignition and piezoelectric
Technology Research Institute and the Group of 7,transformers. Start mass production in 1965, piezo
built 26 research institutes and application ofignition, the past 20 years to get faster
piezoelectric ceramic materials research, productiondevelopment, China is now almost all the gas stove,
and factories only radio ceramics factory in Zibo,bathroom gas boiler, gas room heaters, gas water
Shandong, the main projects carried out mostly withheaters, and cigarette lighters are piezoelectric
the military product related. Involving only the massignition. Piezoelectric transformer has a simple
production of civilian products of piezoelectric ceramicstructure, small size, transformer is high and a high
buzzers and ignition, a small amount for post andelectromechanical conversion efficiency, no
telecommunications of the multi chip ceramic filter,electromagnetic interference and security
mechanical filter, for acoustic and ultrasonicadvantages, it is used for electrostatic smoke
transducer such as piezoelectric ceramics.detectors, negative ion generators, electrostatic
Various types of piezoelectric devices in order tocoating equipment, electrostatic copiers, electric field
meet the different requirements on materialtreatment instrument and LCD backlight and so on.
properties, materials, researchers have conductedSAW formed a complete system for SAW devices
extensive studies of modified additives developed aare a hot field of electronic ceramic products. Surface
large number of high performance piezoelectricacoustic wave (SAW) is spread along a surface
ceramic materials.elastic waves, acoustic surface of China's technology
Lead titanate ceramics (PT)development started in 1970, after 37 years of
The late 90s of last century, in order to meet theresearch and development, has been basically formed
manufacturer for more than 10MHz high frequencyfrom the theoretical study of crystal materials
ceramic filters and ceramic resonators needs,growth and processing, device design and production,
materials researchers titanate ceramic materials byas well as system applications a complete
using a small amount of lanthanum oxide to replace,system.Surface acoustic wave technology
and add the amount of manganese, niobium, ceriumdevelopment in China can be divided into three
ions, to be the high frequency response is good,stages: the first stage, surface acoustic wave
excellent temperature stability of modified leadtechnology in the development and application of the
titanate ceramic materials, their electrical propertiesmilitary field. SAW technology development in all
with the same period in Japan's Murata very similarcountries of the initial impetus comes from defense
materials. It also developed a suitable for highand military areas, China is no exception; radar,
temperature ultrasonic transducer lead titanatecommunications, navigation and electronic
piezoelectric ceramic materials, the successful use ofcountermeasures Dengjun use a wide variety of
the environment for high temperature oil flow metersSAW signal processing devices. The second stage,
deep detection and so on.the acoustic wave technology to the table the field
Lead zirconate titanate ceramic (PZT)of radio and television. The third stage, SAW
80s of last century, Jingdezhen, Jiangxi and Shanghaitechnology in modern communications.
Radio 999 plants at the same time the introductionSurface Acoustic Wave in China has experienced 30
of a factory in Japan Murata piezoelectric ceramicyears of development, the emergence of more than
frequency components, production line, the main raw30 large and small manufacturing enterprises, although
material provided by Japan, which gives the domesticmany manufacturers, but the technical level and scale
mass production and lower costs resulted in greaterof production is limited, in addition to the first 26,55
difficulty, in order to break the Foreign blockade,and Power Technology Research Institute, Germany,
through research and development and improvementTsinghua University Young Electronics Co., Ltd., Wuxi
of PZT material, and soon realized the localization ofGood Electronics Co., Ltd., the production technology,
material formulation, self development of electricalsize and product categories have a certain
properties of PZT piezoelectric ceramic materials areadvantage, over those small scale, mainly in
entirely meet the requirements. Then they workedproduction of TV IF filters, resonators, and filters and
out a variety of bandwidth for different PZTother technological requirements intercom relative
piezoelectric ceramic materials.lower product based, product and low price.
Ternary ceramicsFrom the product packaging point of view, TV IF
The past 20 years, China ternary Modification ofSAW filters move from the metal package Molded
piezoelectric ceramic materials have done a great dealPackage direction, because of Molded package with
of continued research, testing a variety ofsmall size and light weight characteristics, especially in
combinations of elements to replace and add, expandan integrated tuner that can demonstrate its
many modified ternary, quaternary, and multi linesuperiority , many domestic enterprises have
materials, such as: PCM PZT, PMS PZT, PNZ PNSdeveloped their own production of plastic products,
PZT, PMS PNZ PNS PZT, etc. These materials havefrom the scale point of view, Wuxi Good Electronics
different properties, can meet a variety of needs, soCo., Ltd. and China Light and Power Technology Co.,
that the application of piezoelectric ceramic surfaceLtd. Deqing Huaying Electronics Plastic products
to be rapid expansion.occupy a larger market share.
Lead free piezoelectric ceramicsSMD products are now able to mass production of
The piezoelectric ceramics contain high levels of lead,domestic minimum size of 3mm 3mm, the main
the manufacturing process will lead to environmentalproduction units are in the power of technology 55,
pollution, in order to reduce pollution, domestic andDeqing Huaying, 26, and a good Electronics Co., Ltd.,
foreign researchers to carry out a lead freeWuxi. RF filters are now a mainstream product
piezoelectric ceramics research department, and leadpackages are based on the 2.5mm 2.0mm below the
compared to Department of piezoelectric ceramicflip chip technology, so domestic production is
materials, lead free system significantly differentcurrently SAWRF filter a lot of restrictions, due to
from the performance of piezoelectric ceramic leadcost, technology and other factors, the domestic
free piezoelectric ceramics, such as lead freeseveral powerful research institutes and production
piezoelectric ceramics department at about the Curieenterprises are still not in narrowing the product
point higher than 200 ? ~ 300 ?, the dielectricpackaging for further investment plans, Nanyang
constant is only 140 ~ 150, mechanical quality factorGolden Crown Group, has invested some of the flip
as high as 4000 ~ 7000. However, lead freechip devices, but not with productivity.
piezoelectric ceramics for electromechanical couplingAs the market competition, the current SAW
coefficient of performance such as the far less leadprofitability for the industry as a whole is generally
in ceramics, coupled with manufacturing processnot high, the largest market for mobile RF filter has
difficult to control, so lead free piezoelectric ceramicsbeen in maintaining the level of production, loss of
applied only in some specific areas, their study is stillinvestment opportunities. To the future in the
ongoing.industry to survive a certain position, we must,
Rapid infiltrationthrough their own technological progress, and
After 20 years of development, today, a completecontinuously improve product yield, reduce production
range of piezoelectric ceramic products, not onlycosts, improve product quality, increase productivity
widely used in military and industrial fields, but alsoscale. We believe that our industry in the future
penetrated into every corner of people's daily lives.development of SAW, you can do the following
Its application field mainly to the following fiveseveral aspects: first, to enhance mutual cooperation
aspects:and resource integration within. Second, the
First, the frequency control device. Developed rapidlyexpansion of international technical cooperation. Third,
in recent years, there are ceramic resonators,actively explore new fields of application. Surface
ceramic filters, as well as tuning fork filters,Acoustic Wave Technology In addition to the current
mechanical filters, ceramic Discriminator, notch filterconventional applications, there is the sensor, radio
and the delay line. One ceramic resonator, ceramicfrequency based other (RFID), etc. some of the
filters production of piezoelectric ceramic products inspecial purpose.