Feature Article No.1: Contributing to the Advancement and Development of Humankind through Fine Ceramic Technology

Japan
 
Fine ceramics have unlimited potential as materials for a new age. Kyocera is contributing to global environmental protection and the advancement of society by expanding use of fine ceramic materials in diverse industries.
 
Continuously creating the new value which is demanded around the world in every field, from daily-use to advanced industrial applications Kyocera receives an award for its contribution to the asteroid exploration spacecraft, Hayabusa Pressure-resistant vessel supports ocean-bottom seismographs at a depth of 11,000 meters
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Pressure-resistant vessel supports ocean-bottom seismographs at a depth of 11,000 meters
Fine ceramics are also used in pressure-resistant vessels for ocean-bottom seismographs. The vessel utilizes the outstanding features of fine ceramics, such as high compressive strength, corrosion resistance and low specific gravity.

Kyocera, the Japan Agency for Marine-Earth Science and Technology, and Nippon Marine Enterprises, Ltd. jointly developed the fine ceramic Ocean-Bottom Seismograph. The vessel can withstand deep-ocean water pressure at 11,000 meters. As conventional glass vessels can only tolerate water pressure up to about 6,000 meters, the use of the fine ceramic material silicon nitride has made it possible to place seismographs at the bottom of what is said to be the deepest part of the world's oceans - the Mariana Trench.

This will allow for the formation of a detailed observation network and improved observational accuracy; as well as there are expectations for benefits to other research areas such as studying the mechanism of earthquake generation and structural analysis of the ocean floor. Kyocera will continue to improve the performance of the fine ceramic vessels, to enable more advanced measurement at deep ocean.
Photo by Nippon Marine Enterprises, Ltd.
Photo by Nippon Marine Enterprises, Ltd.

Photo by Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
The Self-Surfacing Ocean-Bottom Seismograph is an instrument designed to measure and record earthquakes on the ocean floor. After measurement, the main body floats to the surface and is recovered by a ship. Earthquake data is then analyzed.
Photo by Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

Kyocera's technological strength and ability to meet difficulties contributed to problem solving in this application
Kenichi Asakawa, Dr. of Engineering Assistant Director Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

"We were faced with the difficult problem of achieving high pressure resistance while at the same time maintaining light weight. Kyocera's prompt response has allowed us to proceed with development as planned. Kyocera's technological strength in ceramics combined well with JAMSTEC's oceanic equipment technological capability in pressure-resistant vessels, and efficiency in advanced technological development led to success. The resulting pressure-resistant vessel has enabled earthquake observation at ocean floor depths greater than 6,000 meters. We have high expectations for its usefulness in measurement of future earthquakes."
Photo:Kenichi Asakawa,  Dr. of Engineering Assistant Director Japan Agency for Marine-Earth Science and Technology (JAMSTEC)


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