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4 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on KClO3 by Materials Project

KClO3 is Potassium chlorate structured and crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. K is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of K–O bond distances ranging from 2.86–3.18 Å. There are two inequivalent O sites. In the first O site, O is bonded in a 4-coordinate geometry to three equivalent K and one Cl atom. The O–Cl bond length is 1.51 Å. In the second O site, O is bonded to three equivalent K and one Cl atom to form a mixture of distorted edge and corner-sharing OK3Cl tetrahedra. The O–Cl bond length is 1.51 Å. Cl is bonded in a trigonal non-coplanar geometry to three O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KClO3 by Materials Project

KClO3 is Potassium chlorate-like structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. K is bonded in a 9-coordinate geometry to nine equivalent O atoms. There are three shorter (2.91 Å) and six longer (3.06 Å) K–O bond lengths. O is bonded in a 4-coordinate geometry to three equivalent K and one Cl atom. The O–Cl bond length is 1.51 Å. Cl is bonded in a trigonal non-coplanar geometry to three equivalent O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on KClO3 by Materials Project

KClO3 is Potassium chlorate-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. K is bonded in a 9-coordinate geometry to nine O atoms. There are a spread of K–O bond distances ranging from 2.87–3.21 Å. There are two inequivalent O sites. In the first O site, O is bonded to three equivalent K and one Cl atom to form a mixture of distorted corner and edge-sharing OK3Cl tetrahedra. The O–Cl bond length is 1.51 Å. In the second O site, O is bonded in a 2-coordinate geometry to three equivalent K and one Cl atom. The O–Cl bond length is 1.50 Å. Cl is bonded in a trigonal non-coplanar geometry to three O atoms.

36 MATERIALS SCIENCE↗
NASA NTRS1974

A study of the effects of solid phase reactions on the thermal degradation and ballistic properties of solid propellants

The thermal stability of perchlorate composite propellants was studied at 135 and 170 C. The experimental efforts were concentrated on determining the importance of heterogeneous oxidizer-fuel reactions in the thermal degradation process. The experimental approach used to elucidate the mechanisms by which the oxidizer fuel composites thermally degrade was divided into two parts: (1) keeping the fuel constant and varying the nature of the oxidizers, and (2) holding the oxidizer constant and varying the fuel components. The fuel component primarily utilized in the first phase was polyethylene. Oxidizers included KClO4, KClO3, NH4ClO4 and NH4ClO4 doped with materials such as chlorate, phosphate and arsenate. In the second phase the oxidizer used was primarily NH4ClO4 while the fuels included saturated and unsaturated polybutadiene prepolymers and a series of bonding agents. Techniques employed in the current study include thermogravimetric measurements, differential thermal analysis, infrared, mass spectrometry, electron microscopy, and appropriate wet chemical analysis.

Schmidt, W. G.↗