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1. 发明专利

JPH06316463A POWDERY RAW MATERIAL FOR CERAMIC MULTILAYERED CIRCUIT BOARD AND CRYSTALLITE CERAMIC MULTILAYERED CIRCUIT BOARD 失效
公开(公告)号：JPH06316463A
公开(公告)日：1994-11-15
申请号：JP6454294
申请日：1994-03-07
申请人： HITACHI LTD , CHICHIBU CEMENT KK
发明人： USHIFUSA NOBUYUKI , ISHIHARA SHOSAKU , AMI NORIHIRO , FUNAKOSHI RIE , OGIWARA SATORU , OHASHI MASABUMI , NAGAYAMA KOUSEI , KOBAYASHI FUMIYUKI , SEKIHASHI MASAO , FUJITA TAKESHI , TAGAMI BUNICHI , SENGOKU NORIO , YASUNAGA TAKUMI , EMU JII EMU YUU ISUMAIRU , NAKAI ZENJIRO
IPC分类号： C04B35/18 , H05K1/03 , H05K3/46
摘要： PURPOSE:To make shrinkage in firing isotropic and improve dimensional accuracy by incorporating an aluminum component, a silicon component and an alkaline earth metal component. CONSTITUTION:The powdery ceramic raw material containing 50-60wt.% aluminum component, 50-40wt.% silicon component (expressed in terms of silica) and 0.3-1.5wt.% mullite crystal (expressed in terms of alkaline earth metal oxide) is obtained by mixing a mullite sol mixture obtained by mixing at least an alumina sol with a silica sol with the alkaline earth metal, spraying them into an atmosphere of 1300-1500 deg.C and drying them, A green sheet is obtained by molding a slurry obtained by mixing the powdery raw material with the ceramic powder containing alumina and an additive containing a binder. After a conductive wiring is formed on the green sheet, a ceramic sintered compact is obtained by sintering the green sheet at 1500-1700 deg.C.

2. 发明专利

JPH05298919A 失效
公开(公告)号：JPH05298919A
公开(公告)日：1993-11-12
申请号：JP22128992
申请日：1992-08-20
申请人： CHICHIBU CEMENT KK
发明人： EMU JII EMU YUU ISUMAIRU , NAKAI ZENJIRO , ARAI HIROSHI
IPC分类号： H01B3/08 , H05K1/03
摘要： PURPOSE:To provide sufficient mechanical strength to a composite substrate, make its thermal expansion coefficient near that of silicon and its dielectric constant low, and fire at low temperature by making the composite circuit substrate using a cordierite-anorthite-boron-based composite and providing a fine structure to the composite circuit substrate wherein the anorthite is taken in the cordierite phase. CONSTITUTION:A composite circuit substrate is made of a cordierite-anorthite- boron-based composite material and has a fine structure wherein the anorthite is taken in the cordierite phase. The weight ratio of cordierite/anorthite is (50-95)/(5-50) and boron (calculated in terms of B2O3) to cordierite is 0.5-10wt.%. A cordierite-anorthite composite composition sol is prepared by mixing boehmite sol, silica sol, a water-soluble magnesium salt, and a water-soluble calcium salt, gelled, calcined, and sintered. As a result, the resulting composite circuit substrate has sufficient mechanical strength, thermal expansion coefficient near that of silicon, low dielectric constant, and can be sintered at low temperature.

3. 发明专利

JPS6217009A PREPARATION OF POWDERY SILICON NITRIDE 失效
公开(公告)号：JPS6217009A
公开(公告)日：1987-01-26
申请号：JP15526985
申请日：1985-07-16
申请人： CHICHIBU CEMENT KK
发明人： MINEGISHI KEIICHI , YUZAWA YUKIO , NAKAI ZENJIRO , NEMOTO FUMIO , TSUNATORI HIDEO , FUKUDA TADAO
IPC分类号： C01B21/068 , C04B35/626
摘要： PURPOSE:To obtain powdery silicon nitride contg. a large amt. of alpha-Si3N4 having fine and uniform particle size with high efficiency by forming a porous molded body by mixing siliceous raw material with a carbonaceous raw material, and heating the molded body in nonoxidizing gas atmosphere contg. N2 while controlling the flow rate of the gas. CONSTITUTION:A material contg. at least one among Mg, Ca, Yt, and Zr is mixed with SiO2 having particle size regulated to =0.01mm pore size are packed with a raw material isolating each pore from each other. Nonoxidizing atmosphere gas contg. N2 is passed through the molded body, heated at 1,200-1,600 deg.C while maintaining the conc. of CO in the waste gas at

4. 发明专利

JPH05105419A PRODUCTION OF SPHERICAL CERAMIC POWDER 失效
公开(公告)号：JPH05105419A
公开(公告)日：1993-04-27
申请号：JP12011391
申请日：1991-05-24
申请人： CHICHIBU CEMENT KK
发明人： EMU JII EMU YUU ISUMAIRU , NAKAI ZENJIRO , KUMAKI TAKAO , NEMOTO FUMIO , KATAYAMA KEIICHI
IPC分类号： C01B33/26 , C04B35/18
摘要： PURPOSE:To provide spherical ceramic powder practically free from aggregation and having proper particle diameter. CONSTITUTION:An alumina sol is mixed with a silica sol in (40 60) to (80:20) weight ratio of Al2O3:SiO2 and this mixture is adjusted to pH 2-4 and 3-25wt.% solid concn. The resulting dispersion liq. is sprayed in an atmosphere at 1,000-1,700 deg.C temp. of a flame in the form of mist having

5. 发明专利

JPH01249655A PRODUCTION OF CORDIERITE CERAMICS 失效
公开(公告)号：JPH01249655A
公开(公告)日：1989-10-04
申请号：JP7475288
申请日：1988-03-30
申请人： CHICHIBU CEMENT KK
发明人： EMU JII EMU YUU ISUMAERU , NAKAI ZENJIRO
IPC分类号： C04B35/195 , C04B35/16
摘要： PURPOSE:To enhance sinterability, purity and strength by mixing aluminosilicate sol with Mg(OH)2 sol, converting the mixture into gel and calcining the gel. CONSTITUTION:An org. or inorg. acid is added to water contg. dispersed boehmite, peptization is carried out at >=50 deg.C under ordinary pressure and the resulting pseudo-boehmite sol is mixed with silica sol and adjusted to 2-3pH to prepare aluminosilicate sol (A). An internal gelling agent such as hexamethylenetetramine is added to water contg. a dispersed magnesium salt such as MgCl2 and hydrolysis is carried out to prepare an Mg(OH)2 sol (B). The sol A is mixed with the sol B, adjusted to 2-3pH and converted into gel. This gel is dried, pulverized and calcined at 1,200-1,450 deg.C.

6. 发明专利

JPS63144111A PRODUCTION OF ULTRAFINE POWDER OF MULLITE HAVING COMPOSITION OF STOICHIOMETRIC AMOUNT 失效
公开(公告)号：JPS63144111A
公开(公告)日：1988-06-16
申请号：JP28772186
申请日：1986-12-04
申请人： CHICHIBU CEMENT KK
发明人： SOMIYA SHIGEYUKI , AKIBA TOKUJI , EMU JII EMU YUU ISUMAERU , NAKAI ZENJIRO
IPC分类号： C01B33/26
摘要： PURPOSE:To produce the titled high-purity ultrafine powder having excellent sintering properties and characteristics of sintered material, by blending boehmite sol with an acidic dispersion of amorphous silica in such a way that Al2O3/SiO2 becomes a specific molar ratio and treating by sol-gel method. CONSTITUTION:Boehmite is blended with an acidic dispersion of amorphous silica at pH 2-3 in such a way that a molar ratio of Al2O3/SiO2 is 1.5 and reaction is carried out while maintaining the blended solution at pH 2-3. Mullite sol thus formed is heated and concentrated up to pH 2 and gelatinized. In recent years, synthesis of high-purity mullite fine powder from aluminum n-butoxide and tetraethoxysilanol, etc., is developed, but this synthesis has drawbacks such as use of a large amount of expensive organic raw materials, difficulty in accurate control of Al/Si ratio of coprecipitate, requirement of long time in each process, etc. This invention solves the problems and can readily produce high-purity mullite ultrafine powder having excellent sintering properties, characteristics of sintered material and a composition of stoichiometric amount.

7. 发明专利

JPS62278109A PRODUCTION OF NON-OXIDE CERAMIC POWDER 失效
公开(公告)号：JPS62278109A
公开(公告)日：1987-12-03
申请号：JP11840586
申请日：1986-05-24
申请人： CHICHIBU CEMENT KK
发明人： YUZAWA YUKIO , NAKAI ZENJIRO , NEMOTO FUMIO , TSUNATORI HIDEO
IPC分类号： C01B21/068 , C01B21/072 , C01B31/36
摘要： PURPOSE:To produce the titled uniform and fine ceramic powder in high efficiency, by using granulated raw material composed of a carbonaceous material and a material composed mainly of SiO2 or Al2O3, charging the granule is a reaction chamber having a specific structure and calcining in a non-oxidizing atmosphere. CONSTITUTION:1pt.wt. of a raw material composed mainly of SiO2 or Al2O3 is mixed with 0.1-3pts.wt. of a carbonaceous raw material and the mixture is granulated. The granulated material is fed to the lower A-2 chamber of a reaction vessel divided by a gas-permeable partition wall 2 and composed of vertically divided semicylinders 20a, 20b having >=2 reaction chambers along longitudinal direction. The semicylinders 20a, 20b are restored to the original state by relatively sliding by the length of one chamber to vertically combine the chambers A, B and C with each other. The cylinders are rotated, the cylinder 20b is slid by the length of one chamber to combine the lower chamber A-2 with the upper chamber B-1, turned 180 deg. to transfer the raw material from the lower A-2 chamber to the upper B-2 chamber and the A-1 chamber is supplied with fresh raw material. The raw material is calcined at 1,200-2,200 deg.C in the reaction vessel having non-oxidizing atmosphere by repeating the above procedures.

8. 发明专利

JPS62260718A PRODUCTION OF ULTRAFINE POWDER OF HIGH-PURITY ZIRCONIA-ALUMINA BY HYDROTHERMAL PROCESS 失效
公开(公告)号：JPS62260718A
公开(公告)日：1987-11-13
申请号：JP10318586
申请日：1986-05-06
申请人： SOMIYA SHIGEYUKI , CHICHIBU CEMENT KK
发明人： SOMIYA SHIGEYUKI , YOSHIMURA MASAHIRO , NAKAI ZENJIRO , HISHINUMA KAZUMICHI , KUMAKI TAKAO
IPC分类号： C01F7/34 , C01G25/00 , C04B35/119 , C04B35/486 , C04B35/488 , C04B35/626
摘要： PURPOSE:To obtain ultrafine high-purity zirconia-alumina based slurry having pressure in an autoclave to afford the aimed ultrafine zirconia-alumina powder slurry. The slurry is dehydrated, dried, calcined and disintegrated to provide ultrafine zirconia-alumina based powder.

9. 发明专利

JPH04175264A RAW MATERIAL POWDER OF MULLITE BASED SINTERED COMPACT AND PRODUCTION OF MULLITE BASED SINTERED COMPACT 失效
公开(公告)号：JPH04175264A
公开(公告)日：1992-06-23
申请号：JP32592690
申请日：1990-11-29
申请人： CHICHIBU CEMENT KK
发明人： EMU JII EMU YUU ISUMAIRU , NAKAI ZENJIRO , KATAYAMA KEIICHI , YUZAWA YUKIO , NEMOTO FUMIO
IPC分类号： C04B35/18
摘要： PURPOSE:To obtain raw material powder capable of readily producing having sufficiently large strength, reduced in dispersion of strength and being small in lowering of strength at high temperature by specifying mullite crystal diameter, Al2O3/SiO2 ratio, average particle diameter and shape. CONSTITUTION:When a mixture of alumina sol and silica sol is sprayed to provide globular mullite based powder, the resultant powder has

10. 发明专利

JPH04135655A MEMBER FOR GRINDER 失效
公开(公告)号：JPH04135655A
公开(公告)日：1992-05-11
申请号：JP25670690
申请日：1990-09-26
申请人： CHICHIBU CEMENT KK
发明人： YAMAMOTO YOSHINORI , NAKAI ZENJIRO , YOSHIZANE TOSHIMASA , OHIRA HIROYUKI , SHIBAZAKI NOBUYUKI
IPC分类号： B02C15/12 , B02C17/20
摘要： PURPOSE:To enhance mechanical strength and to reduce cracking due to shock by constituting the member for a grinder of a mullite-based sintered body contg. zirconia and regulating the bulk density thereof to at least specified value. CONSTITUTION:The member for a grinder is used which is constituted of a mullite-based sintered body contg. 15-35wt.% zirconia and has >=3.4g/cm bulk density. The component of mullite material after sintering is desirably regulated to >=97wt.% as the total amount of Al2O3 and SiO2. A content of zirconia in the mullite-based sintered body less than 15wt.% is unsuitable as a grinding ball because fracture toughness and density are small. Therefore it is important that the content of zirconia in the mullite-based sintered body be regulated to >=15wt.%. Reversly a content of zirconia in the mullite-based sintered body e.g. larger than 35wt.%, increases a microcrack in the structure of the sintered body and decreases strength and the same is often cracked by shock. Therefore the content of zirconia is regulated to

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