Materials

  • Decreasing the world's rare earths dependence on China

    China has one-third of the world’s known rare Earth elements, but produces and processes 97 percent of them; to decrease dependence on China, other countries can re-start rare earths mining, while addressing the environmental issues involved; recycle used rare earths (although the recycled material cannot always replace the original minerals), and develop alternatives

  • China says it will not use rare Earth minerals as diplomatic weapon

    China has reassured the United States it has no intention of withholding rare Earth minerals (referred to as “rare earths”) from the market, the U.S. Secretary of State has said; China suspended export of the metals, key to some high-tech industries, to Japan after a diplomatic spat between the two countries

  • China to cut rare Earths minerals export by 30 percent

    China controls more than 95 percent of the global market for rare Earth elements; China has cut rare earths exports by five to 10 percent a year since 2006; China Daily reported yesterday that the government would again cut rare earths export quotas by up to 30 percent next year, “to protect the metals from over-exploitation”; critics charge China’s real goal is to cripple important industrial segments of Western economies

  • High performance materials for the tunnel of the century

    On 15 October Swiss engineers finished their work on the Gotthard Tunnel — longest rail tunnel in the world; the 57-km (35.4-mile) high-speed rail link, which will open in 2017, will form the lynchpin of a new rail network between northern and southeastern Europe and help ease congestion and pollution in the Swiss Alps

  • TECHEXPO - Exclusive Security-Cleared Hiring Events - Register Now!
    view counter
  • Geologists warn of warming-induced landslides flattening cities

    There are 39 cities around the world with populations greater than 100,000 — and an untold number of smaller towns and villages — which are situated within 100 kilometers of a volcano that has collapsed in the past and which may, therefore, be capable of collapsing in the future; thinning glaciers on volcanoes could destabilize vast chunks of summit cones, triggering mega-landslides capable of flattening cities such as Seattle and devastating local infrastructure

  • Unease grows about China's rare Earth elements monopoly

    Rare Earth elements are quite abundant in the Earth’s crust, but environmental concerns and aggressive subsidies by China’s government to Chinese manufacturers have led to a Chinese near-monopoly: 90 percent of the world’s rare Earth elements are now being mined and processed in China; growing unease with this Chinese dominance has led to renewed efforts around the world to develop alternatives to rare Earth elements, and find environmentally sound ways to mine them

  • The world is running out of helium

    It has taken 4.7 billion years for the Earth to accumulate our helium reserves, which we will have exhausted within about a hundred years of the U.S.’s National Helium Reserve having been established in 1925; there is no chemical way of manufacturing helium, and the supplies we have originated in the very slow radioactive alpha decay that occurs in rocks

  • Japan develops vehicle motor free of rare Earth elements

    More than 90 percent of rare earths worldwide are produced in China; China had restricted exports of crucial rare Earth elements in order to cripple certain segments of the economies of other industrial countries; in response, Japanese automakers develop new engines

  • Is rare Earth elements war in the offing?

    China has just 37 percent of the world’s estimated reserves of rare Earth elements (REEs), but a whopping 97 per cent of world production of REEs now comes from China; only a few other countries have REEs on their territory, but environmental and cost issues have so far made mining REES unattractive; the biggest threat may come from the availability of elements needed in agriculture, most particularly phosphorus

  • Using bacteria to create self-healing concrete

    Cement production has an impact on the environment as it is very energy intensive, accounting for about 7 percent of the total anthropogenic atmospheric CO2 emissions; in addition to the energy consumption from production and transportation, air pollution, as well as land use and impacts on the landscape from related mining activities are also matters of concern; means of increasing the service life of concrete structures would make the material not only more durable, but also more sustainable — and researchers find that embedding certain bacteria in the concrete promises to do just that

  • New cement absorbs CO2

    Concrete — the essential material used by the world’s $3.8 trillion construction industry — accounts for 5 percent of the world’s man-made carbon dioxide emissions; each ton of cement emits about 800 kg (1,763 lb.) of CO2 during manufacture — and every year, some 3 billion tons of cement turn into nearly 30 billion tons of concrete, a British start-up has devised a new cement — based on magnesium silicates rather than limestone — that absorbs and stores CO2 when it is produced

  • New Florida museum is glass-covered hurricane-proof fortress

    The new Salvador Dali Museum in St. Petersburg is designed to withstand category 5 hurricanes; the roof is 12-inch thick solid concrete; the walls are even thicker, at eighteen inches; the glass, which makes up big sections of the outside of the museum, can hold up to a category 3 hurricane; if that glass breaks, letting rain, wind, and debris into the facility, the art will still be safe: storm doors will shield the galleries on the third floor, and the vault, which is on the second floor (all of the art is placed on the second and third floors, above the 30-foot storm surge of a category 5 storm)

  • High-tech opportunities of lab-produced silk

    Tougher than a bullet-proof vest yet synonymous with beauty and luxury, silk fibers are a masterpiece of nature whose remarkable properties have yet to be fully replicated in the laboratory; thanks to their amazing mechanical properties as well as their looks, silk fibers have been important materials in textiles, medical sutures, and even armor for 5,000 years; Tufts researchers are getting close to producing silk in the lab

  • Good business: Developers make buildings more disaster-secure than building code requires

    A Florida developer hopes to get more business by making his building hurricane-proof; with debris-resistant windows on all thirty-five of its stories, the developer says the building would withstand a Category 5 hurricane without significant damage; the extra hurricane proofing built into the Miami building shows that sometimes the private market can overtake the public sector when it comes to building design and safety standards; for example, in New York and Washington, D.C., some developers have put in anti-terrorism safeguards that exceed building codes

  • New electronic fiber make smarter fabric a reality

    A soft, flexible fiber with a 1,000 times more capacitance than a co-axial cable could lead to smarter textiles; these smart fabrics could sense their environment, store, transmit, and process information — as well as harvest and store the energy necessary to do all this