Introduction Tokyo Kagaku Kenkyusho Co., Ltd.
Tokyo Kagaku Kenkyusho Co., Ltd Headquarters Tunnel Furnace Testing Furnace
Gate The founder Greetings We have been taking part in the research, development and manufacture of a series of phosphors for more than a half of century. In our beginning, lighting was our basic interest. We have continued our research, development and manufacture of phosphors based on our original text that: lighting creates a peaceful society. Through trial and error in our research and development, we have continued to strive day after day with our motto: Pride of technique and quality to the world. This is the basis of our management principles. Until now, we have successfully offered a series of products with applications for lighting equipment, neon-signs, image displays, paintings and the like. For this work we have received a high level of appreciation from our customers. In recent years we have begun to offer new applications beyond lighting and these have also been widely received. We appreciate the support and praise we have received from our customers. Techniques in the world are evolving and expanding every day. We intend to continue our objective: to further improve our technique and our quality. We understand we must render services for the future if we are going to help our customers change with the times. It is our commitment to develop and provide products for the future.
Company Outline Company Name: Tokyo Kagaku Kenkyusho Co., Ltd. Location: 2-2-1 Shimotsuruma Yamato-shi Kanagawa-ken 242-0001 Japan Established: March 1950 Representatives Tomofumi Moriyama, President History March 1950 Established in Tagagi-cho Meguro-ku, Tokyo for the purpose of research of phosphors to be applied to neon-sign and fluorescent lamps Entrance July 1953 Established in Tokyo Kagaku Kenkyusho for commercial production October 1958 Planning for the construction of a manufacturing plant to expand the business. July 1959 Construction of the head-office and manufacturing plant at Inage-shi Chiba-ken and changed the company s name to Tokyo Kagaku Kenkyusho Co., Ltd as a corporate organization March 1966 Further expanded the business with the construction of the Kanagawa plant at Shimotsuruma Yamato-shi Kanagawa-ken. February 1967 Moved our head-office into Kanagawa plant in Yamato-shi Kanagawa-ken April 1977 Closed Chiba plant and moved the operations to the head-office October 1977 Installed a continuous pusher furnace to improve our operations December 1987 Merged San-ei Rika Kogyo November 1989 Completed a new plant building at Kanagawa. June 1994 Completed new office building at Kanagawa. March 1995 H. Moriyama inaugurated as President November 2002 Acquired ISO 14001 September 2005 Incorporated Donnghua Florescent Material CO. Ltd (Shanghai) in China January 2011 Acquired ISO 9001 October 2013 T. Moriyama inaugurated as President
What is Phosphor? Phosphor while unfamiliar to many, is an important chemical substance that is in electrical appliances that are used every day. Phosphors are used in fluorescent lamps, television and other appliances. This chemical substance receives energy from the outside and transforms that energy into a variety of colors. In the case of a fluorescent lamp, Phosphor is coated inside the glass tube. When electricity is applied to the electrodes at both ends of the tube, thermo-electrons collide against the gaseous mercury in the tube that results in the discharge of ultraviolet rays. The ultraviolet rays hit on the phosphor which converts it into visible light (luminescence). The phosphor changes the ultraviolet rays that are not visible into visible light. What happens in the phosphor? Phosphor contains a very small quantity of impurity that is like a source that emits light (this is said to be an activator). After receiving energy of ultra-violet rays from the outside, electrons in the atom of the impurity are pushed up into a larger orbit in the outside as if they jump from the original orbit by absorbing energy. But the electrons always try to return to their original orbit. The difference between the energies in the outside and the original orbit makes photons emit. At this time light is generated. By modifying both host substances composed of phosphor and different species of impurities, various lights (visible lights) can be generated. Excitation state by energy from outside Emitting light when returning back to the ground state Energy Light Electron Ground State Atomic Nucleus Excitation State Image of light emission
Patented Process Creates Spherical Phosphors! We have developed spherical phosphors. By changing the particular size of alumina as a raw material, a series of spherical phosphors can be developed. (Patent granted) Conventional aluminate phosphor Spherical aluminate phosphor Scanning Electron Microscope
Our company name is Tokyo Kagaku Kenkyusho or Tokyo Kagaku Laboratory in English. BET Surface Area Analyzer Laser Micron Sizer Spectrometer In Japan, the history of phosphor research and manufacturing is only a half-century-old. We think there are still many unknowns to investigate. That is why we have a greater number of employees taking part in research and analytical measurements in our company. In addition to a variety of analytical instruments for investigation and product inspection, we also have particle size distribution measurement equipment, spectrophotometer and an electron microscope, which can observe particle shapes. We are able to analyze individual particles. True Denser VUV Spectrometer We are committed to assist our customers in their investigations and research.
TRI-BAND PHOSPHORS Fluorescance Peak Emission Band Width (50%) BaMgAl10O17 Eu BaMgAl10O17 Eu,Mn (Ba,Sr)MgAl10O17 Eu (Ba,Sr)MgAl10O17 Eu,Mn 452nm 452nm,515nm 453nm 453nm,515nm 51nm 53nm - LaPO4 Ce,Tb CeMgAl11O19 Tb BaMgAl10O17 Eu,Mn 543nm 543nm 515nm,452nm 6nm 6nm - 611nm 5nm Code Name Blue BAM Green LAP CAT BAM-G Red YOX Chemical Formula Y2O3 Eu SPECIAL FLUORESCENT PHOSPHORS Peak Emission Band Width (50%) SrB4O7 Eu 370nm 16nm SPE Sr2P2O7 Eu 420nm 28nm Blue CW CaWO4 415nm 112nm Bluish green BAM-G BCA 452nm, 515nm 480 495nm 88nm Green CMZ ZSM SAE Ce(Mg,Zn)Al11O19 Mn Zn2SiO4 Mn Sr4Al14O25 Eu 517nm 525nm 493nm 58nm 40nm 65nm Orange SRS (Sr,Mg)3(PO4)2 Sn 620nm 140nm Red YOX Y2O3 Eu 611nm 5nm Deep-red MGM 3.5MgO 0.5MgF2 GeO2 Mn 655nm 15nm Fluorescance Code Name Ultra-violet SBE Violet Chemical Formula BaMgAl10O17 Eu,Mn (Ba,Ca,Mg)10(PO4)6Cl2 Eu
CCFL Phosphors Peak Emission Band Width (50%) BaMgAl10O17 Eu 452nm 51nm LAP LaPO4 Ce,Tb 543nm 6nm Red YOX YPV YVE Y2O3 Eu Y(P,V)O4 Eu YVO4 Eu 611nm 620nm 620nm 5nm 5nm 5nm Deep-red MGM 3.5MgO 0.5MgF2 GeO2 Mn 655nm 15nm Fluorescance Code Name Blue BAM Green Chemical Formula PDP Phosphors Peak Emission Band Width (50%) BaMgAl10O17 Eu 452nm 51nm Green ZSM LAP YBT Zn2SiO4 Mn LaPO4 Ce,Tb YBO3 Tb 525nm 543nm 544nm 40nm 6nm 8nm Red YGB (Y,Gd)BO3 Eu 593nm,612nm,627n m - Fluorescance Code Name Blue BAM Chemical Formula For LED, UV Emitting Lamps, and more Phosphors
Access Tokyo Kagaku Kenkyusho Co., Ltd. 2-2-1 Shimotsuruma Yamato-shi Kanagawa-ken 242-0001 Japan TEL: +81-46-261-5006 FAX: +81-46-264-0896 URL http://www.tokyokagaku.co.jp/ tkk@tokyokagaku.co.jp