The synthesis of merit boron-doped diamond

Hong

Under gangling temperature and oblige conditions, add a certain rate ofboron powderin iron-nickel powder catalyst to synthesize level boron-doped diamond single crystal.

The synthesis of quality boron-doped diamond

Throughoptical microscopy found that, the synthesis boron-doped diamond were threatening blackoctahedral, intact crystal form, uniform size; using scanning electronmicroscopy (SEM) analysis of the morphology of boron-doped diamond The resultsshow that: the synthesis of octahedral boron-doped diamond crystals surface issmooth, flat, crystal has big gradation of integrity, the deserving crystallineregion of boron-doped diamond is in the V-shaped territory of the 100 + 111range

The synthetic diamonds beginning environmentcontains many impurity ingredients, some of these impurities can transcribe intodiamond as the substitutional covert or the sett of inclusions Differrentimpurities influence on the exploit of diamond is different Boron is a commonimpurity plane in the diamond, in natural diamond you often can find its traces

When the diamond contains a certain amountof boron, cede correct the diamonds mood optical, thermal, chemical,electrical and specialist In optics make the crystal with color, with theincrease of the boron words in diamond, crystals from yellow graduallybecomes brownish red, gray, blue, until it becomes black black; in thermology, diamondhas deserving inoxidizability, heat resistance and thermal conductivity; in electricalaspects, make the diamond from insulation phenomenon turn into the P-type semiconductor, even havethe semimetals conductive; in chemistry, the boron-doped diamond can incision ironfamily material; in the mechanical properties, the diamonds abrasionresistance, toughness, compressive fastness are enhanced In different areashas shown a broad vision, which aroused the interest of many researchers.However, with the amplify of the character of boron doped, relatively feasible tosynthesize octahedral diamond with boron, the synthesized crystals surfacedefects were increased

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The iron-based brew powder (200 mesh) ascatalyst solvent, scaly graphite powder (200 mesh) as the carbon source, usehigh-purity boron powder as additive The synthesis conditions is 5.0GPa, 1450K-1700K,conduct an experiment Iron-based catalyst, flake graphite and the right amountof boron powder according to a certain standard uniformly various and pressedinto synthetic rods, assembling the pressed barstock in pyrophyllite synthesisblock. The pyrophyllite Synthesis barricade before assembling was through

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