Sapphire Deposits of Kashmir

The sapphire deposits of Kashmir are well known in the gem industry,[38] despite the fact their peak production took place in a relatively short period at the end of the nineteenth and early twentieth centuries. They have a superior cornflower blue hue to them with a mysterious and almost sleepy quality, described by some gem enthusiasts as ‘blue velvet”. Kashmir-origin contributes meaningfully to the value of a sapphire, and most corundum of Kashmir origin can be readily identified by its characteristic silky appearance and exceptional hue. The unique blue appears lustrous under any kind of light, unlike non-Kashmir sapphires which may appear purplish or grayish in comparison. Sotheby's has been in the forefront overseeing record-breaking sales of Kashmir sapphires worldwide. In October 2014, Sotheby’s Hong Kong achieved consecutive per-carat price records for Kashmir sapphires - first with the 12.00 carat Cartier sapphire ring at US$193,975 per carat, then with a 17.16 carat sapphire at US$236,404, and again in June 2015 when the per-carat auction record was set at US$240,205. At present, the world record price-per-carat for sapphire at auction is held by a sapphire from Kashmir in a ring, which sold in October 2015 for approximately US$242,000 per carat (HK$52,280,000 in total, including buyer's premium, or more than US$6.74 million)

The big deposit has increased the use of sapphire in many industries, such as cell phone screen, television screen, windows, etc. tungsten crucible is a main body to grow sapphire.

If there is any other question referring to tungsten crucible for sapphire growth furnace, please feel free to contact us through the following methods.

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Sapphire Mines

Sapphiremines are from alluvial deposits or from primary underground workings. Commercial mining locations for sapphire and ruby include (but are not limited to) the following countries: Afghanistan, Australia, Myanmar/Burma, Cambodia, China, Colombia, India, Kenya, Laos, Madagascar, Malawi, Nepal, Nigeria, Pakistan, Sri Lanka, Tajikistan, Tanzania, Thailand, United States, and Vietnam. Sapphires from different geographic locations may have different appearances or chemical-impurity concentrations, and tend to contain different types of microscopic inclusions. Because of this, sapphires can be divided into three broad categories: classic metamorphic, non-classic metamorphic or magmatic, and classic magmatic.

Sapphires from certain locations, or of certain categories, may be more commercially appealing than others, particularly classic metamorphic sapphires from Kashmir, Burma, or Sri Lanka that have not been subjected to heat-treatment.

The production of sapphire has been improving the development of hard windows, circuits, etc. the improvement of sapphire also leads to the going up production of tungsten parts, which are used for production process of sapphire.

If there is any other question referring to tungsten crucible for sapphire growth furnace, please feel free to contact us through the following methods.

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Sapphire Glass Windows

Some sapphire glass windows are made from pure sapphire boules that have been grown in a specific crystal orientation, typically along the optical axis, the c-axis, for minimum birefringence for the application.
The boules are sliced up into the desired window thickness and finally polished to the desired surface finish. Sapphire optical windows can be polished to a wide range of surface finishes due to its crystal structure and its hardness. The surface finishes of optical windows are normally called out by the scratch-dig specifications in accordance with the globally adopted MIL-O-13830 specification.

The sapphire windows are used in both high pressure and vacuum chambers for spectroscopy, crystals in various watches, and windows in grocery store barcode scanners since the material's exceptional hardness and toughness makes it very resistant to scratching.

The main part for growing sapphire is tungsten crucible, which can be customized.

If there is any other question referring to tungsten crucible for sapphire growth furnace, please feel free to contact us through the following methods.

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Sapphire Crystal Application - Integrated Circuits

Thin sapphire crystal wafers were the first successful use of an insulating substrate upon which to deposit silicon to make the integrated circuits known as silicon on sapphire or "SOS"; now other substrates can also be used for the class of circuits known more generally as silicon on insulator. Besides its excellent electrical insulating properties, sapphire has high thermal conductivity. CMOS chips on sapphire are especially useful for high-power radio-frequency (RF) applications such as those found in cellular telephones, public-safety band radios, and satellite communication systems. "SOS" also allows for the monolithic integration of both digital and analog circuitry all on one IC chip, and the construction of extremely low power circuits.

The main part for growing sapphire is tungsten crucible, which can be customized.

If there is any other question referring to tungsten crucible for sapphire growth furnace, please feel free to contact us through the following methods.

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Tel.: +86 592 512 9696/ +86 5925129595
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Sapphire Growth Process

If there is any other question referring to sapphire growth process and its tungsten heating elements, please feel free to contact us through the following methods.

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Sapphire Crystal Application - Infrared Transparent Window

Sapphire crystal for infrared transparent window needs to be high qualified, and should meet the basic requirements as following:

1)High mechanical strength: infrared transparent window material should have sufficient strength, so that it can withstand the high-speed movement of the pressure load.
2) High thermal stability: can withstand the impact of aerodynamic heating and high temperature caused by the change, transmittance and refractive index by the temperature changes.
3) High chemical stability: the material is exposed to the air, so that the material should be able to prevent salt solution or etching gas corrosion, and should not be easy deliquescence
4) High optical transmittance: can efficiently transmit the ultraviolet to the infrared radiation
5) High optical properties: small optical scattering and good refractive index
6) Meet requirement of large size window

The main part for growing sapphire is tungsten crucible, which can be customized.

If there is any other question, please feel free to contact us through the following methods.

Email: sales@chinatungsten.com
Tel.: +86 592 512 9696/ +86 5925129595
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Sapphire Crystal Application - Microelectronics

Silicon and gallium arsenide are conventional semiconductor materials of the first and second generations of representatives, their development to promote the development of microelectronics, photonics technology, in order to bring about huge changes in people's lives based on information technology. However, due to the performance of the material itself, the first-generation, second-generation semiconductor materials only work at 200 ℃ below the environment, and anti-radiation, high voltage breakdown performance and so can not meet modern electronic technology development for high-temperature, high-power , high-frequency, high-pressure and anti-radiation, can the new requirements that emits blue light. In this case, select the new electronic device material launched the third generation of semiconductors, GaN and SiC wide bandgap become the representative of the third generation of semiconductor material. With the development of microelectronics, the sapphire crystal is created and widely used for the promotion of this industry.

The main part for growing sapphire is tungsten crucible, which can be customized.

If there is any other question referring to tungsten crucible for sapphire growth furnace, please feel free to contact us through the following methods.

Email: sales@chinatungsten.com
Tel.: +86 592 512 9696/ +86 5925129595
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Sapphire Crystal Application - Laser Host

Sapphire crystal is an excellent laser host materials, such as titanium-doped sapphire crystal is the world's most outstanding broadband tunable laser crystal today, its tunable wavelength range of 660 ~ 1200nm. Moulton was first reported since 1982 to achieve laser oscillation since, because of its very wide tuning range and high gain, etc., which have been widely and well studied. With sapphire optical penetration range is very wide, from near-ultraviolet to mid-infrared light wavelength 0.9nm wavelength 5.5μm have good light transmittance, and within the band of 0.25 ~ 4.5μm is still more than 80% penetration rate; making large size, high integrity sapphire single crystal has been used as the matrix material US LICO (Laser interferometer gravitational observatory) project and other large interferometric device for measuring cosmic gravity waves in the preferred spectral components. Sapphire crystal used in civilian areas has also been very widely, such as in medical equipment, environmental equipment, laser equipment, chemical equipment, high vacuum test equipment, fiber guide wire plate textile industry, bar code scanners to scan window, never wear type Rado watch Mongolia and the like.

The main part for growing sapphire is tungsten crucible, which can be customized.

If there is any other question referring to tungsten crucible for sapphire growth furnace, please feel free to contact us through the following methods.
Email: sales@chinatungsten.com
Tel.: +86 592 512 9696/ +86 5925129595 
Fax: +86 5925129797