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Hagi Ware
is a type of Japanese pottery traditionally originated from the town of Hagi, Yamaguchi, in the former Nagato Province. History The origins of Hagi ware can be traced back to the arrival of Korean potters to Hagi, a town situated in Yamaguchi Prefecture on the Japan Sea, following Japan's military invasion of the Korean peninsula in the late 16th century. As a result, a large number of Korean craftsmen were abducted and transported to Japan, where they played a crucial role in establishing new pottery types such as Satsuma, Arita, and Hagi ware ("hagi yaki"). The local feudal lord of the Hagi area at the time, Terumoto Mōri, had appointed potters in a castle town of Matsumoto (presently the city of Hagi) in order to create Hagi wares for his personal tea ceremonies and as gifts. The potters in Matsumoto steadily increased their production so that more kilns were established in Fukawa territory (presently the city of Nagato) during the mid-17th century. However, due to the M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hagi Ido Teskål - Chawan
Hagi, Hadži, or Hadzhi (Хаджи) is a name derived from hajji, an honorific title given to a Muslim person who has successfully completed the Hajj to Mecca, which was later adopted by Christian peoples as a word for ''pilgrim''. People Surname * Dimitri Atanasescu Hagi Sterjio (1836–1907), Aromanian teacher at the first Romanian school in the Balkans for the Aromanians * Gheorghe Hagi (1965–), Romanian footballer and manager * Kira Hagi (1996–), daughter of Gheorghe Hagi and Romanian actress * Ianis Hagi (1998–), son of Gheorghe Hagi and Romanian footballer * Jovan Hadži (1884–1972), zoologist * Mihali Adami Hagi (1754–1825), Aromanian scholar, better known as Daniel Moscopolites Given name * Hadzhi Dimitar, (1840–1868), Bulgarian revolutionary * Hadzhi Hristo (1821-1829), Bulgarian revolutionary (bg) * Hadži Mustafa Pasha (1733—1801), Ottoman commander * Hadži-Prodan (1760–1825), Serbian voivode Other * Japanese bush clover or Lespedeza * Hagi, Yam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay
Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay particles, but become hard, brittle and non–plastic upon drying or firing. Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide. Clay is the oldest known ceramic material. Prehistoric humans discovered the useful properties of clay and used it for making pottery. Some of the earliest pottery shards have been dated to around 14,000 BC, and clay tablets were the first known writing medium. Clay is used in many modern industrial processes, such as paper making, cement production, and chemical filtering. Between one-half and two-thirds of the world's population live or work in buildings made with clay, often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon
Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent In chemistry, the valence (US spelling) or valency (British spelling) of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules. Description The combining capacity, or affinity of an ...—its atom making four electrons available to form covalent bond, covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust. Three Isotopes of carbon, isotopes occur naturally, Carbon-12, C and Carbon-13, C being stable, while Carbon-14, C is a radionuclide, decaying with a half-life of about 5,730 years. Carbon is one of the Timeline of chemical element discoveries#Ancient discoveries, few elements known since antiquity. Carbon is the 15th Abundance of elements in Earth's crust, most abundant element in the Earth's crust, and the Abundance of the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viscosity
The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the internal frictional force between adjacent layers of fluid that are in relative motion. For instance, when a viscous fluid is forced through a tube, it flows more quickly near the tube's axis than near its walls. Experiments show that some stress (such as a pressure difference between the two ends of the tube) is needed to sustain the flow. This is because a force is required to overcome the friction between the layers of the fluid which are in relative motion. For a tube with a constant rate of flow, the strength of the compensating force is proportional to the fluid's viscosity. In general, viscosity depends on a fluid's state, such as its temperature, pressure, and rate of deformation. However, the dependence on some of these properties is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wood Ash
Wood ash is the powdery residue remaining after the combustion of wood, such as burning wood in a fireplace, bonfire, or an industrial power plant. It is largely composed of calcium compounds along with other non-combustible trace elements present in the wood. It has been used for many purposes throughout history. Composition Variability in assessment A comprehensive set of analyses of wood ash composition from many tree species has been carried out by Emil Wolff, among others. Several factors have a major impact on the composition: #Fine ash: Some studies include the solids escaping via the flue during combustion, while others do not. #Temperature of combustion. Ash content yield decreases with increasing combustion temperature which produces two direct effects: #*Dissociation: Conversion of carbonates, sulfides, etc., to oxides results in no carbon, sulfur, carbonates, or sulfides. Some metallic oxides (e.g. mercuric oxide) even dissociate to their elemental state and/or vapori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feldspar
Feldspars are a group of rock-forming aluminium tectosilicate minerals, also containing other cations such as sodium, calcium, potassium, or barium. The most common members of the feldspar group are the ''plagioclase'' (sodium-calcium) feldspars and the ''alkali'' (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust, and 41% of the Earth's continental crust by weight. Feldspars crystalize from magma as both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rocks. Compositions The feldspar group of minerals consists of tectosilicates, silicate minerals in which silicon ions are linked by shared oxygen ions to form a three-dimensional network. Compositions of major elements in common feldspars can be expressed in terms of three endmembers: * potassium feldspar (K-spar) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron
Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in front of oxygen (32.1% and 30.1%, respectively), forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. In its metallic state, iron is rare in the Earth's crust, limited mainly to deposition by meteorites. Iron ores, by contrast, are among the most abundant in the Earth's crust, although extracting usable metal from them requires kilns or furnaces capable of reaching or higher, about higher than that required to smelt copper. Humans started to master that process in Eurasia during the 2nd millennium BCE and the use of iron tools and weapons began to displace copper alloys, in some regions, only around 1200 BCE. That event is considered the transition from the Bronze Age to the Iron A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chawan
A ''chawan'' (; literally "tea bowl") is a bowl used for preparing and drinking tea. Many types of ''chawan'' are used in East Asian tea ceremonies. The choice of their use depends upon many considerations. History The ''chawan'' originated in China. The earliest ''chawan'' in Japan were imported from China between the 13th and the 16th centuries. The ''Jian chawan'', a Chinese tea bowl known as ''Tenmoku chawan'' in Japan, was the preferred tea bowl for the Japanese tea ceremony until the 16th century. In Japan, tea was also mainly drunk from this Chinese variety of tea bowls until about the 15th century. The Japanese term ''tenmoku'' is derived from the name of the Tianmu Mountain, where Japanese priests acquired these tea bowls from Chinese temples to bring back to Japan, according to tradition. An 11th-century resident of Fujian wrote about the Jian tea wares: : By the end of the Kamakura period (1185–1333), as the custom of tea drinking spread throughout Japan and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mōri Clan
The Mōri clan (毛利氏 ''Mōri-shi'') was a Japanese samurai clan descended from Ōe no Hiromoto. Ōe no Hiromoto was descended from the Fujiwara clan. The family's most illustrious member, Mōri Motonari, greatly expanded the clan's power in Aki Province. During the Edo period his descendants became ''daimyō'' of the Chōshū Domain under the Tokugawa shogunate. After the Meiji Restoration with the abolition of the ''han'' system and ''daimyō'', the Mōri clan became part of the new nobility. Origins The founder of the clan, Mōri Suemitsu, was the fourth son of Ōe no Hiromoto. He founded the clan when he took the name from his '' shōen'' named "Mōri" in Aikō District, Sagami Province. After the Jōkyū War, Suemitsu was appointed to the jitō office of a '' shōen'' in Aki Province. He was defeated by Hōjō Tokiyori in 1247 and committed suicide ('' seppuku'') at Minamoto no Yoritomo's shrine (''hokkedō'') along with his Miura clan allies. The genealogy of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crazing
Crazing is the phenomenon that produces a network of fine cracks on the surface of a material, for example in a glaze layer. Crazing frequently precedes fracture in some glassy thermoplastic polymers. As it only takes place under tensile stress, the plane of the crazing corresponds to the stress direction. The effect is visibly distinguishable from other types of fine cracking because the crazing region has different refractive indices from surrounding material. Crazing occurs in regions of high hydrostatic tension, or in regions of very localized yielding, which leads to the formation of interpenetrating microvoids and small fibrils. If an applied tensile load is sufficient, these bridges elongate and break, causing the microvoids to grow and coalesce; as microvoids coalesce, cracks begin to form. Polymers Crazing occurs in polymers, because the material is held together by a combination of weaker Van der Waals forces and stronger covalent bonds. Sufficient local stress over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiln
A kiln is a thermally insulated chamber, a type of oven, that produces temperatures sufficient to complete some process, such as hardening, drying, or chemical changes. Kilns have been used for millennia to turn objects made from clay into pottery, tiles and bricks. Various industries use rotary kilns for pyroprocessing—to calcinate ores, to calcinate limestone to lime for cement, and to transform many other materials. Pronunciation and etymology According to the Oxford English Dictionary, kiln was derived from the words cyline, cylene, cyln(e) in Old English, in turn derived from Latin ''culina'' ("kitchen"). In Middle English the word is attested as kulne, kyllne, kilne, kiln, kylle, kyll, kil, kill, keele, kiele. For over 600 years, the final "n" in kiln was silent. It wasn't until the late 20th century where the "n" began to be pronounced. This is due to a phenomenon known as spelling pronunciation, where the pronunciation of a word is surmised from its spelling an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
