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Microcristalline Graphite Synthesis

#0462


Development of Technology of Monocristalline Graphite Synthesis.

Tech Area / Field

  • MAT-SYN/Materials Synthesis and Processing/Materials

Status
3 Approved without Funding

Registration date
04.10.1995

Leading Institute
NPP Ballistic Technologies, Russia, Moscow reg., Korolev

Project summary

Graphite is a crystalline modification of carbon that is stable at normal conditions. The unique crystalline structure of the graphite stipulates high anisotropy of its strength as well as thermal and electrical properties. For instance, the tensile strength of a perfect graphite monocrystai with three-dimensional ordering along its basal planes reaches 2,000 MPa (which is the record value amongst solid materials) whereas in the normal direction it equals to 20 MPa only. This one and other special features of monocrystalline graphite offer vast opportunities for its industrial application. The most promising examples are:

• neutron and x-ray monochromators;

• crystalline conversion of graphite into diamond;

• high capacity inertia) power storages.

The project has the following objectives:

• Exploratory development of a breakthrough technology of synthesizing three-dimensional (3D) ordered graphite monocrystals;

• Design and construction of a technological installation for production of perfect graphite monocrystals;

• Implementation of proof-of-concept test runs at the TsNHMASH large-scale ballistic facility to confirm the possibility of a graceful crystalline conversion of synthesized graphite monocrystals into diamonds in a way that preserves their initial crystalline quality.

Synthesis of 3D-ordered graphite monocrystals will be conducted through pyrolysis of cyclic hydrocarbons under orienting factors that will provide flatness and spatial orientation of atomic layers of a growing graphite crystal- The installation for implementation of this process will be built at the Ballistic Technologies to manufacture about 120 kg of graphite monocrystals for their subsequent application in x-ray and neutron monochromators.

The crystalline conversion of graphite monocrystals into diamonds is investigated within ISTC Project #30. If the manufactured graphite monocrystals can be gracefully converted into diamonds then an opportunity of a commercial-scale production of diamonds will be taken by the Ballistic Technologies at the TsNHMASH large-scale ballistic facility to yield up to 120 kg of synthetic diamonds per year. An expected profit of this venture will allow to provide a financial support to participating scientists and engineers on a long-term basis as well as sustain operation and maintenance of the unique facilities without dotations from the National Budget.

Within proposed project it is also planned to experimentally demonstrate the advantage of application of 3D-ordered graphite monocrystals to a high capacity inertia! power storage which can further be used to build an advanced electrically-propelled car without an internal combustion engine and organic fuel.


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