{"id":42,"date":"2023-09-22T11:22:22","date_gmt":"2023-09-22T11:22:22","guid":{"rendered":"http:\/\/localhost\/ecole9ja\/?p=42"},"modified":"2023-09-22T11:32:42","modified_gmt":"2023-09-22T11:32:42","slug":"jss-1-first-term-basic-technology-bst-lesson-note-week-9","status":"publish","type":"post","link":"https:\/\/ecolebooks.com\/nigeria\/posts\/jss-1-first-term-basic-technology-bst-lesson-note-week-9\/","title":{"rendered":"Jss 1 First Term Basic Technology BST Lesson Note – Week 9"},"content":{"rendered":"

week 9; properties of ceramics and glass<\/p>\n

\n\n\n\n
\"\"\/<\/strong>Ceramic Material Characteristics
\n\t\t\t\t\t\t\t\t\t<\/strong>Ceramics and glasses are inorganic, nonmetallic materials consisting of metallic and nonmetallic elements bonded primarily with ionic and covalent bonds. These high strength bonds give rise to the special characteristics of these materials. They occupy a unique place in the spectrum of engineered materials offering many desirable alternatives to the metals and polymers in common usage.<\/p>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
General Characteristics of Structural Materials<\/strong><\/td>\n<\/tr>\n
Characteristic<\/strong><\/td>\nCeramics<\/strong><\/td>\nMetals<\/strong><\/td>\nPolymers<\/strong><\/td>\n<\/tr>\n
Density<\/td>\nLow to High<\/td>\nLow to High<\/td>\nLow<\/td>\n<\/tr>\n
Hardness<\/td>\nHigh<\/td>\nMedium<\/td>\nLow<\/td>\n<\/tr>\n
Tensile Strength<\/td>\nLow to Medium<\/td>\nHigh<\/td>\nLow<\/td>\n<\/tr>\n
Compressive Strength<\/td>\nHigh<\/td>\nMedium to High<\/td>\nLow to Medium<\/td>\n<\/tr>\n
Young’s Modulus<\/td>\nMedium to High<\/td>\nLow to High<\/td>\nLow<\/td>\n<\/tr>\n
Melting Point<\/td>\nHigh<\/td>\nLow to High<\/td>\nLow<\/td>\n<\/tr>\n
Dimensional Stability<\/td>\nHigh<\/td>\nLow to Medium<\/td>\nLow<\/td>\n<\/tr>\n
Thermal Expansion<\/td>\nLow to Medium<\/td>\nMedium to High<\/td>\nHigh<\/td>\n<\/tr>\n
Thermal Conductivity<\/td>\nMedium<\/td>\nMedium to High<\/td>\nLow<\/td>\n<\/tr>\n
Thermal Shock<\/td>\nLow<\/td>\nMedium to High<\/td>\nHigh<\/td>\n<\/tr>\n
Electrical Resistance<\/td>\nHigh<\/td>\nLow<\/td>\nHigh<\/td>\n<\/tr>\n
Chemical Resistance<\/td>\nHigh<\/td>\nLow to Medium<\/td>\nMedium<\/td>\n<\/tr>\n
Oxidation Resistance<\/td>\nMedium to High<\/td>\nLow<\/td>\nLow<\/td>\n<\/tr>\n
Machinability<\/td>\nMedium<\/td>\nLow<\/td>\nMedium<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u00a0<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
.There are wide variations in the properties of ceramics and glasses due primarily to differences in bonding and wide variations in chemical composition. However, as a materials class, the following characteristics are typical.<\/td>\n<\/tr>\n
\"\"\/<\/td>\nLow to moderate density compared to metals<\/td>\n<\/tr>\n
\"\"\/<\/td>\nHigh modulus of elasticity (stiffness)<\/td>\n<\/tr>\n
\"\"\/<\/td>\nGood strength retention at elevated temperatures<\/td>\n<\/tr>\n
\"\"\/<\/td>\nResistant to high temperature creep<\/td>\n<\/tr>\n
\"\"\/<\/td>\nDimensional stability<\/td>\n<\/tr>\n
\"\"\/<\/td>\nHigh compressive strength<\/td>\n<\/tr>\n
\"\"\/<\/td>\nLow to moderate tensile and shear strength<\/td>\n<\/tr>\n
\"\"\/<\/td>\nHigh hardness<\/td>\n<\/tr>\n
\"\"\/<\/td>\nCorrosion and oxidation resistant<\/td>\n<\/tr>\n
\"\"\/<\/td>\nGood electrical insulation properties<\/td>\n<\/tr>\n
\"\"\/<\/td>\nWide range of thermal conductivity<\/td>\n<\/tr>\n
\"\"\/<\/td>\nWide range of thermal expansion coefficient<\/td>\n<\/tr>\n
\"\"\/<\/td>\nBrittle<\/td>\n<\/tr>\n
\"\"\/<\/td>\nLow impact strength<\/td>\n<\/tr>\n
\"\"\/<\/td>\nSensitive to thermal shock<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

uses of ceramics;<\/p>\n

Uses of Ceramics
\n<\/h2>\n

Ceramic products are hard, porous, and brittle. As a result, they are used to make pottery, bricks, tiles, cements, and glass. Ceramics are also used at many places in gas turbine engines. Bio-ceramics are used as dental implants and synthetic bones. Given below are some other important uses of ceramics.<\/p>\n

Uses of Whitewares
\n\t\t\t\t<\/h3>\n

Whitewares find application in spark plugs, electrical insulators, laboratory equipments, crucibles, dishes, and high-class potteries.<\/p>\n

Uses of Clay
\n\t\t\t\t<\/h3>\n

Clay is the starting raw material for manufacturing bricks, tiles, terracotta, pottery, earthenwares, sewer, drain pipes, and covers for electrical cables.<\/p>\n

Uses of Stonewares
\n\t\t\t\t<\/h3>\n

Stonewares are used for constructing sanitary fixtures, such as sinks and bath tubs. Stonewares are also used in the construction of piping vessels, drainage pipes, underground cable sheathings, sewerage pipes, home pipes, absorption towers, valves, and pumps in the chemical industry. They are cheaper than many other construction materials but are rather fragile and once broken, they have no resale value.<\/p>\n

Uses of Glass
\n\t\t\t\t<\/h3>\n

The main use of glass is to make household glassware, decorative items, and optical lenses. Glasses are used for heat insulation purposes, for example, in ovens. Glass is used as an insulator in metal pipelines, in vacuum cleaners, and on the walls and roofs of houses. Glass is resistant to chemicals. As a result, it is used to filter corrosive liquids such as acids and acid solutions. It is also used for sound insulation. Safety glass is used in aircraft, automobiles, helicopter, and submarines. Glass can also be…
\nquestion <\/p>\n

    \n
  1. \n
    define ceramics\n<\/div>\n<\/li>\n
  2. \n
    5 properties of ceramics\n<\/div>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    week 9; properties of ceramics and glass Ceramic Material Characteristics Ceramics and glasses are inorganic,…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,45],"tags":[],"class_list":["post-42","post","type-post","status-publish","format-standard","hentry","category-posts","category-first-term-jss1-basic-technology"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/42","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/comments?post=42"}],"version-history":[{"count":1,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/42\/revisions"}],"predecessor-version":[{"id":43,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/42\/revisions\/43"}],"wp:attachment":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/media?parent=42"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/categories?post=42"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/tags?post=42"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}