N-type Man Made Diamond Crystal

Silicon carbide (SiC), also known as carborundum /kɑːrbəˈrʌndəm/, is a semiconductor containing silicon and carbon. It occurs in nature as the extremely rare mineral moissanite. Synthetic SiC powder has been mass-produced since 1893 for use as an abrasive. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests. Electronic applications of silicon carbide such as light-emitting diodes (LEDs) and detectors in early radios were first demonstrated around 1907. SiC is used in semiconductor electronics devices that operate at high temperatures or high voltages, or both. Large single crystals of silicon carbide can be grown by the Lely method and they can be cut into gems known as synthetic moissanite. SiC with high surface area can be produced from SiO2 contained in plant material.

History

Early experiments

Non-systematic, less-recognized and often unverified syntheses of silicon carbide include:

J. J. Berzelius's reduction of potassium fluorosilicate by potassium (1810)

César-Mansuète Despretz's passing an electric current through a carbon rod embedded in sand (1849)

Robert Sydney Marsden's dissolution of silica in molten silver in a graphite crucible (1881)

Paul Schuetzenberger's heating of a mixture of silicon and silica in a graphite crucible (1881)

Albert Colson's heating of silicon under a stream of ethylene (1882).
 

Product	4H-SiC & 6H-SiC
Grade	Grade l	Grade ll
Diameter	50.8mm±0.38mm
Thickness	8mm- or Customer Specification
Primary Flat Orientation	Perpendicular to <11-20>±5.0︒
Primary Flat Length	15.88mm±1.65mm
Secondary Flat Orientation	90°CW from Primary flat±5.0°
Secondary Flat Length	8.0m±1.65mm
Positive Angle chip direction	{0001}±0.28
Off axis Wafer Orientation	4.0°toward<11-20>±0.5° 8.0°toward<11-20>±0.5°
Edge Exclusion	1.0㎜
TTV/Bow	<15um/<15um
Micropipe Density	<10piece cm-2	<30piece/cm-2
Resistivity	Conductive	0.01-0.03×cm	0.01-0.1×cm
	Semi-insulating	>105×cm
Surface Finish	Both Polished (Si face Ra <0.2nm) or Customer Specification

Useful of our moissanite crystal, rough moissanite

Uses of silicon carbide

Electronic circuit elements

Ultraviolet LED

Silicon carbide was the first commercially important semiconductor material. A crystal radio "carborundum" (synthetic silicon carbide) detector diode was patented by Henry Harrison Chase Dunwoody in 1906. It found much early use in shipboard receivers.

Power electronic devices

Silicon carbide is a semiconductor in research and early mass production providing advantages for fast, high-temperature and/or high-voltage devices. The first devices available were Schottky diodes, followed by junction-gate FETs and MOSFETs for high-power switching. Bipolar transistors and thyristors are currently developed. A major problem for SiC commercialization has been the elimination of defects: edge dislocations, screw dislocations (both hollow and closed core), triangular defects and basal plane dislocations.

Machine of our moissanite crystal, rough moissanite

Factory of our moissanite crystal, rough moissanite

Exhibition of our company

Bangkok Gem&Jewelry Fair 62nd

Package and shipment and payment of our moissanite crystal

 Why choose us:

1. 30 sets of advanced imorted and national cutting machine

2. we are specialized in manufacturing synthetic gemstones and jewelry according to customers request. All kinds of colors, sizes and shapes can be customized.

3. The jewelry such as Ring, Pendant. Earring, Necklace, Bracelet, Bangle, Brooch

4. Unique styles, excellent quality and considerate services win general customers’ unanimous recognition and praise. We adhere to the management idea of regarding quality as life, innovation as driving force and customer first!

Moissanite  Maintenance

The Moissanite ring should be removed when doing heavy work, so as to avoid the deformation of the ring and the Mosang stone.Maintenance Moissanite ring, professional cleaning: Moissanite stone is very lipophilic and easy to contaminate oil, so apply hand cream and remove Moissanite when washing dishes. It can't be worn while swimming, and the chloride bleach in the water will erode the Moissanitering. It is recommended to choose professional jewelry cleaners and instrument cleaning. Maintenance Moissanite Ring, Classified Storage: Classify and store different gems to prevent friction between then.

Brand story

Hmois

In 1893, The French Nobel Prize winner Dr. Henry Moissan found these sparkling pieces of Sic.

In 1905, To order Dr. Henri moissan, the newly found gem was named Moissanite

Our company in order to celebrate the Dr. Henry Moissan, So named our brand to Hmois

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