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公开(公告)号：KR100310275B1
公开(公告)日：2001-11-09
申请号：KR1019990000904
申请日：1999-01-15
Applicant: 한국과학기술연구원
IPC: C04B35/00 , C04B35/495 , C04B35/26
Abstract: 본발명은고 유전율이면서도유전손실이극소화된순수한 Pb(FeNb)O(PFN) 유전체세라믹스의새로운제조방법을제공하는것이다. 본발명의 PFN계유전체세라믹스의제조방법은통상의고상반응법에따라 PFN계유전체세라믹스분말을제조한후, 첨가제의혼입없이산소분위기에서하소및 소결시키는것을특징으로한다. 본발명에따르면, 하소및 소결공정의제어만으로고유전율이면서도유전손실이극소화된순수한 PFN 유전체세라믹스를얻을수 있다.
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公开(公告)号：KR1020000050797A
公开(公告)日：2000-08-05
申请号：KR1019990000904
申请日：1999-01-15
Applicant: 한국과학기술연구원
IPC: C04B35/00 , C04B35/495 , C04B35/26
CPC classification number: C04B35/497 , C04B35/64 , C04B2235/3272 , C04B2235/658 , H01B3/12
Abstract: PURPOSE: A process for preparing PFN dielectric ceramics without using additives at a low temperature of less than 950°C is provided which gives the title ceramics having high dielectric constant and low dielectric by controlling calcining and sintering processes. CONSTITUTION: A process comprises the steps of providing Pb(Fe1/2Nb1/2)O3(PFN) powder from Fe2O3, Nb2O5 and PbO, calcining the PFN powder in an oxygen atmosphere and sintering in an oxygen atmosphere at a temperature of less than 950°C after molding of calcined PFN powder. Only controlling calcining and sintering processes without requiring addition of additives such as Mn obtains a sintered body having high dielectric constant and minimized dielectric loss.
Abstract translation: 目的：提供在低于950℃的低温下不使用添加剂制备PFN介电陶瓷的方法，其通过控制煅烧和烧结方法得到具有高介电常数和低介电常数的标题陶瓷。 构成：一种方法包括从Fe2O3，Nb2O5和PbO中提供Pb（Fe1 / 2Nb1 / 2）O3（PFN）粉末的步骤，在氧气氛中煅烧PFN粉末，并在低于950℃的温度下在氧气氛中烧结 煅烧后的PFN粉末成型后的℃。 仅控制煅烧和烧结工艺而不需要添加添加剂如Mn得到具有高介电常数和最小的介电损耗的烧结体。
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公开(公告)号：KR1020000050735A
公开(公告)日：2000-08-05
申请号：KR1019990000805
申请日：1999-01-14
Applicant: 한국과학기술연구원
IPC: C04B35/03 , C04B35/495 , C04B35/46
CPC classification number: H01G4/1254 , H01G4/1218
Abstract: PURPOSE: A microwave dielectric composition prepared by using La(Mg2/3Nb1/3)O3 having a relatively low sintering temperature is provided which produces a ceramic dielectric substance having excellent microwave dielectric characteristics. CONSTITUTION: A composition comprises La(Mg2/3Nb1/3)O3 having a relatively low sintering temperature, TiO2 for improving the temperature coefficient characteristics of resonance frequency and one or plurality of W, Mo, Cr, Se, Te or Po for improving quality coefficient. The composition can prepare a ceramic dielectric substance showing excellent microwave dielectric characteristics such as high quality coefficient, dielectric constant and stable temperature coefficient even using inexpensive raw material.
Abstract translation: 目的：提供通过使用具有相对低的烧结温度的La（Mg2 / 3Nb1 / 3）O3制备的微波介电组合物，其产生具有优异的微波介电特性的陶瓷电介质。 构成：组合物包含具有相对较低烧结温度的La（Mg2 / 3Nb1 / 3）O3，用于提高共振频率的温度系数特性的TiO 2和用于改善质量的一个或多个W，Mo，Cr，Se，Te或Po 系数。 即使使用廉价的原料，该组合物也可以制备显示出优异的微波介电特性如高质量系数，介电常数和稳定的温度系数的陶瓷电介质。
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公开(公告)号：KR1020000013235A
公开(公告)日：2000-03-06
申请号：KR1019980031979
申请日：1998-08-06
Applicant: 한국과학기술연구원
IPC: C04B35/46
CPC classification number: H01B3/12 , C04B35/465 , C04B35/64
Abstract: PURPOSE: A microwave dielectric ceramic composition for low temperature firing contains an appropriate amount of additives such as B2O3, Sb2O3 and Y2O3 to obtain a dense sintered compact even at a low temperature of 1200°C and has good microwave characteristics. CONSTITUTION: A microwave dielectric ceramic composition for low temperature firing comprises (Mg,Ca)TiO3 as a principal component, and additives such as B2O3, Sb2O3 and Y2O3 so as to obtain a dense sintered compact even at a low temperature of 1200°C and has good microwave characteristics, wherein 0.2-0.5 wt.% of B2O3 is added.
Abstract translation: 目的：用于低温焙烧的微波介电陶瓷组合物含有适当量的添加剂如B2O3，Sb2O3和Y2O3，即使在1200℃的低温下也能获得致密的烧结体，并具有良好的微波特性。 构成：即使在低温烧成的微波介电陶瓷组合物中，以（Mg，Ca）TiO 3为主成分，也可以添加B2O3，Sb2O3，Y2O3等添加剂，即使在1200℃的低温下也能得到致密的烧结体， 具有良好的微波特性，其中添加了0.2-0.5重量％的B2O3。
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公开(公告)号：KR1020000009735A
公开(公告)日：2000-02-15
申请号：KR1019980030344
申请日：1998-07-28
Applicant: 한국과학기술연구원
IPC: C04B35/495
CPC classification number: H01B3/12 , C04B2235/3232 , C04B2235/3255
Abstract: PURPOSE: A composition comprising 1 mole MgNb2O6 and 0-1 mole TiO2 as a main composition and 0-0.4 wt.% of MO3(M¬6+ = W, Mo, Cr, Se, Te, and Po) as additives is provided which can be sintered at a relatively low temperature. CONSTITUTION: The composition comprises MgNb2O6 + xTiO2(where x = 0-1.0) and 0-0.4 weight% of MO3(where M is one element selected from W, Mo, Cr, Se, Te, and Po). For an example, 1 mole MgO and 1 mole Nb2O5 are mixed by a wet ball milling method and calcined at 1,100°C for 4 hr. The solution added with 2 wt.% PVA binder is sprayed on the calcined powder to give granules with a size of about 200 micro meters. A disk sample with a diameter of 10 mm and a thickness of 4.8 mm is formed with granules at pressure of 98 Mpa, held at 300-500°C for above 3 hr to remove the binder and calcined at 1,150-1,250°C for 4 hr in the atmosphere at a heating speed of 5°C/min. The sintered sample is grinded with a SiC abrasive paper to be a ratio of diameter to thickness of about 0.45. The composition has a relatively lower sintering temperature(1,200°C), higher quality coefficient(QX f is more than 40,000 GHz) and dielectric constant(epsilon is more than 25), more stable temperature coefficient(tau f =-49 from to +38 ppm/°C) than conventional high-frequency dielectric composition.
Abstract translation: 目的：提供包含1摩尔MgNb 2 O 6和0-1摩尔TiO 2作为主要组合物和0-0.4重量％的MO 3（M 6+ = W，Mo，Cr，Se，Te和Po）作为添加剂的组合物 其可以在相对低的温度下烧结。 构成：组合物包含MgNb2O6 + xTiO2（其中x = 0-1.0）和0-0.4重量％的MO3（其中M是选自W，Mo，Cr，Se，Te和Po中的一种元素）。 例如，通过湿球磨法将1摩尔MgO和1摩尔Nb 2 O 5混合，并在1100℃下煅烧4小时。 将加入2重量％PVA粘合剂的溶液喷涂在煅烧粉末上，得到尺寸为约200微米的颗粒。 在压力为98Mpa的颗粒上形成直径为10mm，厚度为4.8mm的圆盘样品，在300-500℃下保持3小时以除去粘合剂，并在1150-1,250℃下煅烧4 hr，加热速度为5℃/ min。 将烧结的样品用SiC砂纸研磨成直径与厚度之比约为0.45。 该组合物具有相对较低的烧结温度（1200℃），更高的质量系数（QX f大于40,000GHz）和介电常数（ε大于25），更稳定的温度系数（τf = -49从+ 38ppm /℃）比传统的高频电介质组合物。
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Patent Agency Ranking
公开(公告)号：KR1019980073313A
公开(公告)日：1998-11-05
申请号：KR1019970008514
申请日：1997-03-13
Applicant: 한국과학기술연구원
IPC: H01G4/12
Abstract: 본 발명은 1050~1150℃의 비교적 낮은 온도에서 소결되고, 소결조제 없이도 치밀한 미세구조와 우수한 유전특성을 가지며, 다양한 온도 보상 범위를 갖고, 비교적 값싼 금속 산화물 원료만으로 구성된 조성을 갖는 온도 보상용 마이크로파 유전체를 제공하기 위하여, 산화아연 및 산화티탄이 화학양론적으로 조합되는 ZnTiO
3 중의 Zn이 Zn 양 1에 대하여 0.175 내지 0.25의 양으로 Mg와, Zn 양 1에 대하여 0 보다 크고 0.15 이하의 양으로 Ni, Cu, Ba, Sr 및 그들의 조합으로 구성되는 군으로부터 선택되는 어느 하나로 치환되는 고주파용 유전체 세라믹 조성물을 제공한다.-
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公开(公告)号：KR102013787B1
公开(公告)日：2019-08-23
申请号：KR1020170071494
申请日：2017-06-08
Applicant: 한국과학기술연구원
IPC: H01L21/321 , H01L21/3105 , H01L21/02 , H01L21/3065
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公开(公告)号：KR101178226B1
公开(公告)日：2012-08-30
申请号：KR1020110046552
申请日：2011-05-18
Applicant: 한국과학기술연구원
IPC: C04B35/462 , C04B35/495 , C03C3/093 , C04B35/64
Abstract: 본 발명은 저온소성용 마이크로파 유전체 세라믹 조성물에 관한 것이다. 보다 구체적으로는 Zn
1-x Co
x TiNb
2 O
8 또는 ZnTi(Nb
1-y Ta
y )
2 O
8 유전체 조성물에 보로실리케이트계 유리프리트를 저온소결제로 첨가하여 제조한 저온소성용 유전체 세라믹 조성물로서, 900℃ 이하의 온도에서 저온소성이 가능하고 내화학성이 양호하며, 유전특성은 유전율 (k) 25 ～ 45, 품질계수 (Qㅧf) 10,000 GHz 이상, 공진주파수의 온도계수(τ
f )는 -100 ～ +100 ppm/℃의 범위로 조절이 가능하다. 따라서, 본 발명의 마이크로파 유전체 세라믹 조성물은 듀플렉서(duplexer), BPF(Band Pass Filiter) 등 수동부품에 응용되며, 기판 및 안테나 등에 응용되는 동일 또는 유사한 보로실리케이트계 유리프리트를 적용한 저유전율 유전체 조성물과 동일소성이 가능하여 다층 패키징 및 복합모듈화가 가능하다.
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