专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0987016A PIEZOELECTRIC CERAMIC MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH0987016A
公开(公告)日：1997-03-31
申请号：JP26361995
申请日：1995-09-19
申请人： NIHON CEMENT
发明人： EZAKI TORU , KATAOKA MASAKO , YAMAKAWA TAKAHIRO , TAKAHASHI SHIGERU
IPC分类号： C04B35/49
摘要： PROBLEM TO BE SOLVED: To obtain a piezoelectric ceramic material having a large specific dielectric const. and electric-mechanical coupling coefft. at a temp. lower than a specified temp. by adding Ag and Pb to a PZT compsn. and sintering. SOLUTION: Powders of the source material are mixed to obtain Pb1-a-b Sra (Mg1/3 Nb2/3 )Zry Tiz O3-b (wherein (a), (b), (x), (y) and (z) are atomic ratios and satisfy 0 =1100 deg.C and

2. 发明专利

JPH08333161A PRODUCTION OF PIEZOELECTRIC MATERIAL 失效
公开(公告)号：JPH08333161A
公开(公告)日：1996-12-17
申请号：JP16011995
申请日：1995-06-05
申请人： NIHON CEMENT
发明人： KATAOKA MASAKO , EZAKI TORU , YAMAKAWA TAKAHIRO , TAKAHASHI SHIGERU
IPC分类号： C04B35/00 , C04B35/49 , C04B35/495
摘要： PURPOSE: To provide a producing method of a piezoelectric material capable of lowering a sintering temperature without addition of a sintering auxiliary or an excess amount of Pb and capable of hardly occurring destruction in polarization. CONSTITUTION: In a production of a piezoelectric having a composition of ABO3 , the raw materials are mixed so as the elements of A site be A=mB in a molar ratio (0.95 =5m /g, then sintered.

3. 发明专利

JPH08288607A MANUFACTURE OF PIEZOELECTRIC MATERIAL AND PASTE FOR FORMING CONDUCTOR OF PIEZOELECTRIC MATERIAL 失效
公开(公告)号：JPH08288607A
公开(公告)日：1996-11-01
申请号：JP11655195
申请日：1995-04-18
申请人： NIHON CEMENT
发明人： EZAKI TORU , KATAOKA MASAKO , YAMAKAWA TAKAHIRO , TAKAHASHI SHIGERU
IPC分类号： H05K1/09 , H01L41/083 , H01L41/187 , H01L41/22
摘要： PURPOSE: To suppress the growth and densification of particles by adding niobium oxide and/or antimony oxide to paste for forming conductor composed mainly of silver and palladium or palladium. CONSTITUTION: Paste for forming conductor is prepared by adding 70 pts.wt. ethyl cellulose, DBP, and α-terpineol and 20 pts.wt. PZT powder having the same composition as that a piezoelectric ceramic sheet has. Then Nb2 O5 and/or Sb2 O3 is added to the paste at a rate of 10-100μg/cm and the paste is printed on the piezoelectric ceramic sheet. A plurality of printed ceramic sheet are laminated, pressed, and sintered. The growth and densification of particles can be suppressed by lowering the driving force of sintering by lowering the surface energy of the PZT particles or lowering the sintering speed by hindering the diffusion of the ions constituting the PZT.

4. 发明专利

JPH08283069A PIEZOELECTRIC CERAMIC AND ITS PRODUCTION 失效
公开(公告)号：JPH08283069A
公开(公告)日：1996-10-29
申请号：JP10713795
申请日：1995-04-07
申请人： NIHON CEMENT
发明人： KATAOKA MASAKO , EZAKI TORU , YAMAKAWA TAKAHIRO , TAKAHASHI SHIGERU
IPC分类号： C04B35/49
摘要： PURPOSE: To improve the degree of deterioration even under high voltage load and to obtain a piezoelectric ceramic less liable to the reduction of energy transducing efficiency than conventional ceramics by introducing specified substitutive elements into PZT type piezoelectric ceramics. CONSTITUTION: The compsn. of this piezoelectric ceramic is represented by the formula Pb1-a-b Sra (Zrm Tin Mnx Nby Sbz )O1+2m+2n+2.5y+1.5z-b (where 0

5. 发明专利

JPH1051044A LAMINATION TYPE PIEZOELECTRIC TRANSFORMER ELEMENT 失效
公开(公告)号：JPH1051044A
公开(公告)日：1998-02-20
申请号：JP20173796
申请日：1996-07-31
申请人： NIHON CEMENT
发明人： KATAOKA MASAKO , EZAKI TORU , YAMAKAWA TAKAHIRO , INOUE YOSHIKAZU
IPC分类号： H01L41/107 , H01L41/22
摘要： PROBLEM TO BE SOLVED: To improve conversion efficiency, by constituting each inner electrode of Ag-Pd mixture containing Pd of specified wt.%, which has a specified thickness. SOLUTION: Inner electrodes 6a and 6b which are alternately laminated in the input region 2 of a lamination type piezoelectric transformer element 1 are electrically connected every other electrode. In a piezoelectric transformer element having viaconductor in the element, the viaconductor is apt to absorb natural vibration of the piezoelectric transformer element, similarly to the inner electrodes, and deteriorates conversion efficiency. Each inner electrode is constituted of Ag-Pd mixture containing Pd of 20-80wt.%, and the thickness is made 1-5μm. Thereby the inner electrode is made hard to absorb the vibration, and Qm of the whole element is improved, so that the conversion efficiency of the element can be improved.

6. 发明专利

JPH09312428A PIEZOELECTRIC BOOSTER MODULE 失效
公开(公告)号：JPH09312428A
公开(公告)日：1997-12-02
申请号：JP12865396
申请日：1996-05-23
申请人： NIHON CEMENT
发明人： KATAOKA MASAKO , EZAKI TORU , YAMAKAWA TAKAHIRO , INOUE YOSHIKAZU
IPC分类号： H01L41/107 , H01L41/22
摘要： PROBLEM TO BE SOLVED: To thin a piezoelectric booster module, and to make small its plan dimensions by a method wherein a case is fixed to the circumferential part of a substrate in such a manner that the case, in which a piezoelectric transducer element is housed, and at least a part of the thickness of a piezoelectric booster circuit substrate are overlapped in the range of thickness of the entire module. SOLUTION: A piezoelectric transducer element 4 is housed in a frame-like piezoelectric transducer element case 8, and the piezoelectric transducer element 4 is fixed to the case 8 leaving a suitable clearance between the side face and the case using a bonding agent 11 to be applied to the side face part. Also, the frame-like case 8 has pawls 3 to be used for fixing to a substrate. As above- mentioned, the case 8 is fixed to the edge part on the circumference of the substrate in such a manner that at least a part of the thickness of the case 8, in which the piezoelectric transducer element 4 is housed, and a piezoelectric booster circuit substrate is overlapped in the scope of thickness of the entire module. An input/output lead wire is connected to the piezoelectric transducer element 4.

7. 发明专利

JPH09223828A LAMINATED ELEMENT FOR PIEZOELECTRIC TRANSFORMER 失效
公开(公告)号：JPH09223828A
公开(公告)日：1997-08-26
申请号：JP5255396
申请日：1996-02-16
申请人： NIHON CEMENT
发明人： KATAOKA MASAKO , EZAKI TORU , YAMAKAWA TAKAHIRO , INOUE YOSHIKAZU
IPC分类号： H01L41/107 , H01L41/22
摘要： PROBLEM TO BE SOLVED: To prevent breakdowns between inner electrodes unexposed to the surface of a laminated element for piezoelectric transformers, by making the inner electrodes and interlayer connection conductors whereby the inner electrodes formed in the laminated element are connected every two electrode layers unexposed to the surface of the laminated element. SOLUTION: After cutting a piezoelectric ceramics tape in an adequate size, sticking it on a printing frame, via holes for filling interlayer connection conductors thereinto are bored therein. Filling conductor pastes into the via holes by using a metallic mask, and drying them, thereafter, conductot pastes for inner electrodes are printed thereon by using screening masks to prevent the conductor pastes from extruding from the side surfaces of a laminated element and to divide the inner electrodes into a-layer and b-layer ones. The printed a-layer and b-layer inner electrodes are superimposed on each other alternately. Thereto, two tapes are further bonded in a thermo- compression way in the uppermost and lowermost layers of the laminated element to burn them thereafter. In the two tapes, conductors are filled only into one-side via holes required for the connections of the uppermost and lowermost layers. Thereby, the unexposed inner electrode and unexposed interlayer connection conductors to the surfaces of the laminated element can be formed.

8. 发明专利

JPH092872A PIEZOELECTRIC COMPOSITION 失效
公开(公告)号：JPH092872A
公开(公告)日：1997-01-07
申请号：JP17543295
申请日：1995-06-19
申请人： NIHON CEMENT
发明人： EZAKI TORU , KATAOKA MASAKO , YAMAKAWA TAKAHIRO , TAKAHASHI SHIGERU
IPC分类号： C04B35/49 , H01L41/187
摘要： PURPOSE: To obtain a piezoelectric composition resistant to fracture even if large strain is developed, improved in piezoelectric properties and mechanical properties, with MgO grains smaller in size than PZT-PMN grains as the matrix phase dispersed homogeneously. CONSTITUTION: A mixture of PbO, SrCO3 , Nb2 O5 , ZrO2 and TiO2 is first calcinated and then incorporated with MgO of greater grain size followed by conducting a secondary baking to effect homogeneous dispersion of the resultant MgO grains in PZT-PMN grains as the matrix phase, thus obtaining the objective piezoelectric composition consisting of an oxide of perovskite crystal, structure having a composition of the formula Pb1-a-b Sra (Mg1/3 Nb2/3 )x Zry Tiz O3-b (in terms of atom number ratio, 0

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式