Ash has been found thousands of kilometers away from an eruption site. Wind can carry small volcanic ash particles great distances. These rock fragments can mix with the solidified lava fragments in the air and create an ash cloud. Eruptions can also shatter the solid rock of the magma chamber and volcanic mountain itself. In the air, magma cools and solidifies into volcanic rock and glass fragments. The force of these explosions shatters and propels the liquid rock into the air. When gases inside a volcano's magma chamber expand, they violently push molten rock ( magma) up and out of the volcano. Ash is a product of explosive volcanic eruptions. Particles are sometimes called tephra-which actually refers to all solid material ejected by volcanoes. Coarse particles of volcanic ash look and feel like grains of sand, while very fine particles are powdery. Generally, particles of volcanic ash are 2 millimeters (.08 inches) across or smaller. Unlike the soft ash created by burning wood, volcanic ash is hard, abrasive, and does not dissolve in water. 239000000758 substrate Substances 0.Volcanic ash is made of tiny fragments of jagged rock, minerals, and volcanic glass.239000002245 particle Substances 0.000 title claims abstract description 25.Assignors: CHOI, JONG-SEO, PARK, DEUK-IL Application granted granted Critical Publication of US6204600B1 publication Critical patent/US6204600B1/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). reassignment SAMSUNG DISPLAY DEVICES CO., LTD. Assignors: CHOI, JONG-SEO, PARK, DEUK-IL Assigned to SAMSUNG DISPLAY DEVICES CO., LTD. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority to KR1019970054213A priority Critical patent/KR100252068B1/en Priority to KR97-54213 priority Application filed by Samsung Display Devices Co Ltd filed Critical Samsung Display Devices Co Ltd Assigned to SAMSUNG DISPLAY DEVICES CO., LTD. Original Assignee Samsung Display Devices Co Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US09/174,654 Inventor Deuk-il Park Jong-seo Choi Current Assignee (The listed assignees may be inaccurate.
#Particle playground emit over distance pdf
Google Patents Field emission device having floating electrode and conductive particle layerĭownload PDF Info Publication number US6204600B1 US6204600B1 US09/174,654 US17465498A US6204600B1 US 6204600 B1 US6204600 B1 US 6204600B1 US 17465498 A US17465498 A US 17465498A US 6204600 B1 US6204600 B1 US 6204600B1 Authority US United States Prior art keywords electrode substrate field emission emission device floating Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US6204600B1 - Field emission device having floating electrode and conductive particle layer US6204600B1 - Field emission device having floating electrode and conductive particle layer
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