# Copyright 2019 TerraPower, LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Zinc Oxide."""
from armi.materials.material import Material
from armi.utils.units import getTk
[docs]class ZnO(Material):
propertyValidTemperature = {"linear expansion percent": ((10.12, 1491.28), "K")}
[docs] def setDefaultMassFracs(self):
self.setMassFrac("ZN", 0.8034)
self.setMassFrac("O16", 0.1966)
[docs] def density(self, Tk=None, Tc=None):
return 5.61
[docs] def linearExpansionPercent(self, Tk=None, Tc=None):
"""
Return the linear expansion percent for Polycrystalline ZnO.
Notes
-----
Digitized from Figure 1.24 from
Zinc Oxide: Fundamentals, Materials and Device Technology
"""
Tk = getTk(Tc, Tk)
self.checkPropertyTempRange("linear expansion percent", Tk)
return (
-1.9183e-10 * Tk**3 + 6.5944e-07 * Tk**2 + 5.2992e-05 * Tk - 5.2631e-02
)